JP2010183704A - Power receiving control device, power receiving apparatus, power transmission control device, power transmission apparatus, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power receiving control device enabling an efficient test in a non-contact power transmission system, and to provide a power receiving apparatus, a power transmission control device, a power transmission apparatus, and an electronic apparatus. <P>SOLUTION: The power receiving control device 50 installed on the power receiving apparatus 40 of the non-contact power transmission system includes a reception processing section 123 for performing reception processing of information from the power transmission apparatus 10, and a sequence control section 124 for performing sequence control of the power receiving control device 50. The reception processing section 123 receives test mode designation information from the power transmission apparatus 10, and the sequence control section 124 executes test sequence processing different from usual sequence processing based on the received test mode designation information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power reception control device, a power reception device, a power transmission control device, a power transmission device, an electronic device, and the like.

  In recent years, contactless power transmission (contactless power transmission) that uses electromagnetic induction and enables power transmission even without a metal part contact has been highlighted. Charging of telephones and household equipment (for example, a handset of a telephone) has been proposed.

  There exists patent document 1 as a prior art of such non-contact electric power transmission. In Patent Document 1, ID authentication is realized by transmitting and receiving an authentication code between a power transmission side (primary side) and a power reception side (secondary side), and insertion of a foreign object or the like is detected.

  In such a non-contact power transmission system, sequence control during normal operation is complicated. For this reason, the tests (shipment test, failure analysis) are also complicated, and there are problems such as an increase in test time.

JP 2006-60909 A

  According to some aspects of the present invention, it is possible to provide a power reception control device, a power reception device, a power transmission control device, a power transmission device, an electronic device, and the like that enable an efficient test in a contactless power transmission system.

  One embodiment of the present invention is a non-contact power that electromagnetically couples a primary coil and a secondary coil to transmit power from a power transmitting device to a power receiving device and supply power to a load of the power receiving device. A power reception control device provided in the power reception device of a transmission system, comprising: a reception processing unit that performs reception processing of information from the power transmission device; and a sequence control unit that performs sequence control of the power reception control device, wherein the reception The processing unit receives test mode designation information from the power transmission device, and the sequence control unit relates to a power reception control device that executes a test sequence process different from the normal sequence process based on the received test mode designation information To do.

  According to one aspect of the present invention, when the power transmission device transmits the test mode designation information, the reception processing unit receives the test mode designation information. The sequence control unit executes a test sequence process different from the normal sequence process based on the received test mode designation information. In this way, the test sequence process corresponding to the desired test mode can be executed without executing the normal sequence process. Therefore, an efficient test in a contactless power transmission system is possible.

  In one aspect of the present invention, the information processing apparatus includes a transmission processing unit that performs a transmission process of information to the power transmission device, and the transmission processing unit displays test compatibility information indicating a test mode that can be supported by the power reception control device. It may be sent to the device.

  In this way, the test mode is set on the power transmission side from the test modes that can be handled by the power reception control device, and the test mode designation information corresponding to the test mode is transmitted from the power transmission side to the power reception side. become. Therefore, only the test sequence process corresponding to the test mode that can be handled by the power receiving side is executed, and versatility can be improved.

  In one aspect of the present invention, the sequence control unit performs a process for transmitting a full charge detection command to the power transmission device without detecting a full charge of a battery included in the load of the power reception device. It may be executed as a sequence process.

  In this way, it is possible to efficiently inspect in a short time whether the full charge detection sequence has been properly executed.

  In one aspect of the present invention, when the sequence control unit receives a recharge confirmation command for a battery included in the load of the power receiving apparatus from the power transmission apparatus, the sequence control unit transmits a response command for the recharge confirmation command to the power transmission apparatus. The process for transmitting to the server may be executed as the test sequence process.

  In this way, it is possible to efficiently inspect in a short time whether the recharging confirmation sequence has been properly executed.

  In the aspect of the invention, the sequence control unit may execute, as the test sequence process, a self-test process that combines a series of processes for testing.

  In this way, a self-test process that is a combination of a series of processes can be automatically executed, so that the efficiency of the test can be improved.

  In the aspect of the invention, the sequence control unit may execute a process for transmitting detection information on the power receiving side to the power transmission device as the test sequence process.

  In this way, the power transmission side can acquire detection information on the power receiving side using the test sequence process.

  In one aspect of the present invention, a command processing unit that performs command processing may be included, and the sequence control unit may shift to test sequence processing according to the test mode designation information in command branching in the command processing.

  In this way, various test sequence processes can be added or deleted, and various tests can be handled.

  In one aspect of the present invention, the sequence control unit, when receiving a test mode designation command as the test mode designation information from the power transmission device, specifies a test sequence designated by the test mode designation command in the command branch. You may transfer to processing.

  In this way, the power transmission side can transmit the test mode designation information to the power receiving side using the test mode designation command.

  According to another aspect of the present invention, the reception processing includes a negotiation processing unit that performs contactless power transmission negotiation processing, and a setup processing unit that performs contactless power transmission setup processing based on a result of the negotiation processing. The unit may receive the test mode designation information from the power transmission device in the setup process.

  In this way, in the setup process, if test mode designation information is transmitted from the power transmission side to the power reception side, the power transmission side instructs the power reception side before the start of normal power transmission, and the power reception side performs a test corresponding to the instructed test mode. Sequence processing can be executed.

  Another aspect of the present invention relates to a power reception device including any one of the power reception control devices described above and a power reception unit that converts an induced voltage of the secondary coil into a DC voltage.

  Another aspect of the invention relates to an electronic device including the power receiving device described above and a load to which power is supplied by the power receiving device.

  Another aspect of the present invention is a non-contact power that electromagnetically couples a primary coil and a secondary coil to transmit power from a power transmitting device to a power receiving device, and supplies power to a load of the power receiving device. A power transmission control device provided in the power transmission device of a transmission system, comprising: a transmission processing unit that performs a transmission process of information to the power reception device; and a sequence control unit that performs sequence control of the power transmission control device; When set, the sequence control unit executes a test sequence process corresponding to the test mode, and the transmission processing unit relates to a power transmission control device that transmits test mode designation information to the power receiving device.

  According to another aspect of the present invention, in the test mode, test sequence processing corresponding to the test mode is executed, and test mode designation information is transmitted to the power receiving side. In this way, the power transmission side and the power reception side can execute the test sequence process corresponding to the desired test mode without executing the normal sequence process. Therefore, an efficient test in a contactless power transmission system is possible.

  According to another aspect of the present invention, the information processing apparatus includes a reception processing unit that performs reception processing of information from the power receiving device, and the transmission processing unit includes test support availability information that indicates a test mode that the power reception control device can handle. This is related to the power transmission control device that transmits, to the power receiving device, test mode designation information that is determined to be supported by the test supportability information when received by the reception processing unit.

  In this way, the test mode is set on the power transmission side from the test modes that can be handled by the power reception control device, and the test mode designation information corresponding to the test mode is transmitted to the power reception side. Therefore, only the test sequence process corresponding to the test mode that can be handled by the power receiving side is executed, and versatility can be improved.

  In another aspect of the present invention, a command processing unit that performs command processing may be included, and the sequence control unit may shift to test sequence processing corresponding to the test mode in command branching in the command processing.

  In this way, various test sequence processes can be added or deleted, and various tests can be handled.

  In another aspect of the present invention, the sequence control unit may perform processing for transmitting a test mode designation command corresponding to the test mode as the test mode designation information to the power receiving apparatus.

  In this way, the power transmission side can transmit the test mode designation information to the power receiving side using the test mode designation command.

  Further, in another aspect of the present invention, the transmission includes a negotiation processing unit that performs contactless power transmission negotiation processing, and a setup processing unit that performs contactless power transmission setup processing based on a result of the negotiation processing, the transmission The processing unit may transmit the test mode designation information to the power receiving apparatus in the setup process.

  In this way, in the setup process, if test mode designation information is transmitted from the power transmission side to the power reception side, the power transmission side instructs the power reception side before the start of normal power transmission, and the power reception side performs a test corresponding to the instructed test mode. Sequence processing can be executed.

  Moreover, the other aspect of this invention is related with the power transmission apparatus containing the power transmission control apparatus in any one of said, and the power transmission part which produces | generates alternating voltage and supplies it to the said primary coil.

  Moreover, the other aspect of this invention is related with the electronic device containing the power transmission apparatus as described above.

1A, 1B, and 1C are explanatory diagrams of contactless power transmission. Explanatory drawing of an opposing test. 1 is a configuration example of a power transmission device, a power transmission control device, a power reception device, and a power reception control device of the present embodiment. 4A and 4B are explanatory diagrams of data transfer by frequency modulation and load modulation. FIG. 5A to FIG. 5C are operation explanatory diagrams in normal sequence processing. FIG. 6A to FIG. 6C are operation explanatory diagrams in normal sequence processing. 7A and 7B are explanatory diagrams of the test mode. FIGS. 8A to 8C are explanatory diagrams of operations in the test sequence process. FIG. 9A to FIG. 9C are operation explanatory diagrams in the test sequence processing. Explanatory drawing of the processing sequence of non-contact electric power transmission. Explanatory drawing of the processing sequence of non-contact electric power transmission. FIGS. 12A to 12C are operation explanatory views of this embodiment when the processing sequence of FIG. 10 is applied. FIG. 13A to FIG. 13C are operation explanatory views of this embodiment when the processing sequence of FIG. 10 is applied. The detailed structural example of the power transmission apparatus of this embodiment, a power transmission control apparatus, a power receiving apparatus, and a power reception control apparatus. The flowchart for demonstrating the operation | movement in a normal sequence process. The flowchart for demonstrating the operation | movement in a normal sequence process. The flowchart for demonstrating the operation | movement in a normal sequence process. The flowchart for demonstrating operation | movement in a test sequence process. The flowchart for demonstrating operation | movement in a test sequence process.

  Hereinafter, preferred embodiments of the present invention will be described in detail. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are indispensable as means for solving the present invention. Not necessarily.

1. Electronic Device FIG. 1A shows an example of an electronic device to which the contactless power transmission method of this embodiment is applied. A charger 500 (cradle) which is one of electronic devices has a power transmission device 10. A mobile phone 510 that is one of the electronic devices includes a power receiving device 40. The mobile phone 510 includes a display unit 512 such as an LCD, an operation unit 514 including buttons and the like, a microphone 516 (sound input unit), a speaker 518 (sound output unit), and an antenna 520.

  Electric power is supplied to the charger 500 via the AC adapter 502, and this electric power is transmitted from the power transmitting device 10 to the power receiving device 40 by contactless power transmission. Thereby, the battery of the mobile phone 510 can be charged and the device in the mobile phone 510 can be operated.

  Note that the electronic apparatus to which this embodiment is applied is not limited to the mobile phone 510. For example, the present invention can be applied to various electronic devices such as wristwatches, cordless telephones, shavers, electric toothbrushes, wrist computers, handy terminals, portable information terminals, electric bicycles, and IC cards.

  As schematically shown in FIG. 1B, power transmission from the power transmission device 10 to the power reception device 40 is performed on the primary coil L1 (power transmission coil) provided on the power transmission device 10 side and on the power reception device 40 side. This is realized by electromagnetically coupling the secondary coil L2 (power receiving coil) formed to form a power transmission transformer. Thereby, non-contact power transmission becomes possible.

  In FIG. 1B, the primary coil L1 and the secondary coil L2 are, for example, air-core planar coils formed by winding a coil wire spirally on a plane. However, the coil of the present embodiment is not limited to this, and any shape, structure, or the like may be used as long as the primary coil L1 and the secondary coil L2 can be electromagnetically coupled to transmit power.

  For example, in FIG. 1C, the primary coil L1 is formed by winding a coil wire around the X-axis around the magnetic core in a spiral shape. The same applies to the secondary coil L2 provided in the mobile phone 510. In this embodiment, the present invention can also be applied to a coil as shown in FIG. In the case of FIG. 1 (C), as the primary coil L1 and the secondary coil L2, in addition to the coil wound around the X axis, a coil wound around the Y axis may be combined. .

2. Opposite test In a test at the time of shipment or failure analysis of the power transmission device (power transmission module) 10 and the power reception device (power reception module) 40 in FIG. 1A, the power transmission device 10 and the power reception device 40 are opposed to each other as shown in FIG. Conduct the facing test. Specifically, the inspection is performed with the primary coil L1 and the secondary coil L2 facing each other so as to have an appropriate positional relationship. And in the test | inspection of the power receiving apparatus 40, the power receiving apparatus 40 is sequentially tested by making the power transmission apparatus 10 into a reference. On the other hand, in the inspection of the power transmission device 10, the power transmission device 10 to be inspected is sequentially tested with the power reception device 40 as a reference.

  As a method of the comparative example of such an opposing test, a method of simply confirming whether or not the normal transmission (charging) mode has been successfully performed can be considered.

  However, in the method of this comparative example, there is a problem that complicated sequence control on the power transmission side and the power reception side cannot be accurately inspected and it cannot be determined whether the authentication function or the like has functioned correctly.

3. Configuration FIG. 3 shows a configuration example of the power transmission device 10, the power transmission control device 20, the power reception device 40, and the power reception control device 50 of the present embodiment that can solve the above-described problems. With the configuration of FIG. 3, for example, the primary coil L <b> 1 and the secondary coil L <b> 2 are electromagnetically coupled to transmit power from the power transmission device 10 to the power reception device 40 and supply power to the load 90 A transmission (non-contact power transmission) system is realized.

  The power transmission device 10 (power transmission module, primary module) can include a primary coil L1, a power transmission unit 12, and a power transmission control device 20. The power transmission device 10 and the power transmission control device 20 are not limited to the configuration shown in FIG. 3, and some of the components are omitted, other components (for example, a waveform monitor circuit) are added, or the connection relationship is changed. Various modifications such as these are possible. For example, the power transmission unit 12 may be built in the power transmission control device 20.

  The primary coil L1 (power transmission side coil) is electromagnetically coupled to the secondary coil L2 (power reception side coil) to form a power transmission transformer. For example, when power transmission is necessary, as shown in FIGS. 1A and 1B, a mobile phone 510 is placed on the charger 500 so that the magnetic flux of the primary coil L1 passes through the secondary coil L2. To make sure On the other hand, when power transmission is unnecessary, the charger 500 and the mobile phone 510 are physically separated so that the magnetic flux of the primary coil L1 does not pass through the secondary coil L2.

  The power transmission unit 12 generates an AC voltage having a predetermined frequency during power transmission, and generates an AC voltage having a different frequency according to data during data transfer, and supplies the AC voltage to the primary coil L1. The power transmission unit 12 forms a resonance circuit together with the first power transmission driver that drives one end of the primary coil L1, the second power transmission driver that drives the other end of the primary coil L1, and the primary coil L1. One capacitor can be included. Each of the first and second power transmission drivers included in the power transmission unit 12 is an inverter circuit (buffer circuit) configured by, for example, a power MOS transistor, and is controlled by the power transmission control device 20.

  In FIG. 3, data communication from the power transmission side to the power reception side is realized by frequency modulation, and data communication from the power reception side to the power transmission side is realized by load modulation.

  Specifically, as illustrated in FIG. 4A, when transmitting the data “1” to the power receiving side, for example, the power transmission unit 12 generates an alternating voltage of the frequency f1 and stores the data “0”. In the case of transmission, an AC voltage having a frequency f2 is generated. The detection circuit 59 on the power receiving side detects the change in the frequency, thereby discriminating data “1” and “0”. Thereby, data communication by frequency modulation from the power transmission side to the power reception side is realized.

  On the other hand, the load modulation unit 46 on the power receiving side variably changes the load on the power receiving side according to the data to be transmitted, and changes the signal waveform of the induced voltage of the primary coil L1 as shown in FIG. . For example, when data “1” is transmitted to the power transmission side, the power reception side is set to a high load state, and when data “0” is transmitted, the power reception side is set to a low load state. Then, the load state detection circuit 30 on the power transmission side detects data “1” and “0” by detecting the change in the load state on the power reception side. Thereby, data communication by load modulation from the power receiving side to the power transmission side is realized.

  In FIGS. 4A and 4B, data communication from the power transmission side to the power reception side is realized by frequency modulation, and data communication from the power reception side to the power transmission side is realized by load modulation. Alternatively, other modulation schemes or other schemes may be employed.

  The power transmission control device 20 is a device that performs various controls of the power transmission device 10, and can be realized by an integrated circuit device (IC), a microcomputer, and a program thereof. The power transmission control device 20 can include a control unit 22, a register unit 23, a host I / F (interface) 27, a test circuit 28, and a load state detection circuit 30. It should be noted that some of these components (eg, host I / F, load state detection circuit) may be omitted, or other components may be added.

  The control unit 22 (power transmission side) controls the power transmission control device 20 and the power transmission device 10. The control unit 22 can be realized by an ASIC circuit such as a gate array, or can be realized by a microcomputer and a program operating on the microcomputer.

  The power transmission control unit 100 included in the control unit 22 performs power transmission control. For example, sequence control or power control is performed for power transmission (normal power transmission, temporary power transmission) of contactless power transmission. The transmission processing unit 102 performs transmission processing of information (command, data, etc.) to the power receiving device 40. For example, information is transmitted to the power receiving side by frequency modulation or the like. The reception processing unit 103 performs reception processing of information (command, data, etc.) from the power receiving device 40. For example, information is received from the power receiving side by load demodulation or the like. The sequence control unit 104 performs sequence control (main sequence control) of the power transmission control device 20. When the load state detection circuit 30 detects the load state on the power receiving side, the detection determination unit 106 performs detection determination such as foreign object detection and removal detection based on the detection information. The use function setting unit 108 performs setting processing of functions to be used (communication function, periodic authentication function, etc.). For example, based on the power receiving side corresponding function information and the power transmission side corresponding function information received from the power receiving side, the corresponding function determination process is performed, and the use function is set (determined).

  The register unit 23 (storage unit) can be accessed (written and read) by the host 2 on the power transmission side via the host I / F 27, and can be realized by, for example, a RAM or a D flip-flop. Information stored in the register unit 23 may be stored in a non-volatile memory such as a flash memory or a mask ROM.

  The information register 110 is a register for storing information such as transmission conditions and communication conditions for contactless power transmission. For example, parameters such as drive frequency and drive voltage, and parameters (threshold values) for detecting the load state on the power receiving side are stored. The status register 112 is a register for the host 2 to check various states such as a power transmission state and a communication state. The command register 114 is a register for the host 2 to write various commands. The interrupt register 116 is a register for various interrupts, and includes, for example, a register for setting enable / disable of each interrupt and a register for notifying the host 2 of the interrupt factor. The data register 118 is a register for buffering transmission data to the charging side and reception data from the power receiving side. The test register 119 is a register for setting a test mode and storing test supportability information.

  The host I / F 27 is an interface for communicating with the host 2 on the power transmission side. In FIG. 3, communication is realized by I2C (Inter Integrated Circuit). Here, the host 2 is a CPU or the like mounted on an electronic device (charger) on the power transmission side. The communication method between the host and the host I / F is not limited to I2C, and may be a communication method based on the same idea as I2C, or a communication method of a normal serial interface or parallel interface.

  The test circuit 28 is a circuit for setting a test mode. Specifically, the test mode is set based on the test mode setting signal TEST and the test clock signal TMCK input from the outside via the IC input terminal of the power transmission control device 20. The test mode may be set via the host I / F 27.

  The load state detection circuit 30 (waveform detection circuit) detects the load state on the power receiving side (power receiving device or foreign object). This detection of the load state can be realized by detecting the waveform change of the induced voltage signal (coil end signal) of the primary coil L1. For example, when the load state (load current) on the power receiving side (secondary side) changes, the waveform of the induced voltage signal changes. The load state detection circuit 30 detects such a change in waveform and outputs a detection result (detection result information) to the control unit 22. The control unit 22 determines the load state (load fluctuation, load level) on the power receiving side (secondary side) based on the load state detection information in the load state detection circuit 30.

  The power reception device 40 (power reception module, secondary module) can include a secondary coil L2, a power reception unit 42, a load modulation unit 46, a power supply control unit 48, and a power reception control device 50. Note that the power reception device 40 and the power reception control device 50 are not limited to the configuration in FIG. 3, and some of the components (for example, the load modulation unit) are omitted, other components are added, or the connection relationship is changed. Various modifications such as these are possible. For example, any one of the power reception unit 42, the load modulation unit 46, and the power supply control unit 48 may be incorporated in the power reception control device 50.

  The power receiving unit 42 converts the AC induced voltage of the secondary coil L2 into a DC voltage. This conversion can be realized by a rectifier circuit included in the power receiving unit 42.

  The load modulation unit 46 performs load modulation processing. Specifically, when data is transmitted from the power receiving side to the power transmitting side, the load at the load modulation unit 46 (secondary side) is variably changed according to the data to be transmitted, as shown in FIG. The signal waveform of the induced voltage of the primary coil L1 is changed.

  The power supply control unit 48 controls power supply to the load 90. That is, the power supply to the load 90 is turned on or off. Specifically, the level of the DC voltage from the power receiving unit 42 (rectifier circuit) is adjusted, a power supply voltage is generated, supplied to the load 90, and the battery 94 of the load 90 is charged. Note that the load 90 may not include the battery 94.

  The power reception control device 50 is a device that performs various controls of the power reception device 40 and can be realized by an integrated circuit device (IC), a microcomputer, and a program thereof. The power reception control device 50 can operate with a power supply voltage generated from the induced voltage of the secondary coil L2. The power reception control device 50 can include a control unit 52, a register unit 53, a host I / F 57, and a detection circuit 59. It should be noted that some of these components (for example, host I / F, detection circuit) may be omitted, or other components may be added.

  The control unit 52 (power reception side) controls the power reception control device 50 and the power reception device 40. The control unit 52 can be realized by an ASIC circuit such as a gate array, or can be realized by a microcomputer and a program operating on the microcomputer.

  The power reception control unit 122 included in the control unit 52 performs power reception control. For example, sequence control for receiving power for contactless power transmission is performed. The transmission processing unit 122 performs information transmission processing on the power transmission device 10. For example, information is transmitted to the power transmission side by load modulation or the like. The reception processing unit 123 performs processing for receiving information from the power transmission device 10. For example, information is received from the power transmission side by frequency demodulation or the like. The sequence control unit 124 performs sequence control (main sequence control) of the power reception control device 50. When the detection circuit 59 performs position detection or frequency detection, the detection determination unit 126 performs detection determination based on the detection information. For example, the use function setting unit 128 sets the use function based on the power transmission side corresponding function information received from the power transmission side and the power reception side corresponding function information.

  The register unit 53 (storage unit) can be accessed by the host 4 on the power receiving side via the host I / F 57, and can be realized by, for example, a RAM or a D flip-flop. Information stored in the register unit 53 may be stored in a non-volatile memory such as a flash memory or a mask ROM. The function of each register of the register unit 53 is substantially the same as that of the register on the power transmission side, and thus the description thereof is omitted.

  The host I / F 57 is an interface for performing communication with the host 4 on the power receiving side through, for example, I2C. Here, the host 4 is a CPU, an application processor, or the like mounted on the electronic device on the power receiving side. The detection circuit 59 detects the positional relationship between the primary coil L1 and the secondary coil L2, and detects the coil drive frequency at the time of data transmission from the power transmission side to the power reception side.

  In the present embodiment, the reception processing unit 123 on the power receiving side receives the test mode designation information from the power transmission device 10. For example, the transmission processing unit 122 on the power receiving side transmits test supportability information notifying the test mode that can be supported by the power reception control device 50 to the power transmission device 10, and the reception processing unit 103 on the power transmission side receives the test supportability information. Then, the sequence control unit 104 on the power transmission side executes test sequence processing corresponding to the test mode, and the transmission processing unit 102 specifies information for designating (setting) the test mode determined to be supported by the test supportability information. To the power receiving device 40. Then, the sequence control unit 124 on the power receiving side executes a test sequence process different from the normal sequence process based on the received test mode designation information.

  Note that it is possible to perform a modification in which the power transmission side transmits the test mode designation information to the power receiving side without using such test supportability information. The test mode designation information may be transmitted from the power transmission side to the power reception side, for example, in an authentication processing period before a command branch described later. Alternatively, the power transmission side transmits a test mode designation command as test mode designation information in the command frame after the start frame to the power reception side. Then, when the power receiving side receives this test mode designation command, it may shift to a test sequence process designated by the test mode designation command in the command branch.

  For example, the test circuit 28 on the power transmission side sets a test mode (for example, test modes 1, 2, and 3 to be described later) in the test register 119 based on a test mode setting signal TEST and a test clock signal TMCK from the outside. Then, whether or not the test mode set in the test register 119 is a test mode that can be handled by the power receiving side is determined based on the test availability information received from the power receiving side. If it is determined that the test mode is compatible, the sequence control unit 104 executes a test sequence process corresponding to the test mode, and the transmission processing unit 102 specifies information for specifying the set test mode. Is sent to the power receiver. Then, the power-receiving-side sequence control unit 124 executes a test sequence process specified by the test mode specifying information.

  For example, the sequence control unit 124 on the power receiving side executes a process of transmitting a full charge detection command for notifying a full charge without detecting a full charge of the battery 94 included in the load 90 of the power receiving apparatus 40 as a test sequence process. . Specifically, when a normal power transmission (charging) start command is received from the power transmission device 10, the full charge detection command is immediately transmitted to the power transmission device 10 without shifting to the normal power transmission sequence. The sequence control 104 on the power transmission side also executes processing corresponding to the test sequence processing on the power reception side. For example, when the test mode for full charge detection is set, after transmitting a command specifying the test mode to the power receiving side, a normal power transmission start command is transmitted, and the transmission condition is switched to the condition for normal power transmission. When the full charge detection command is received from the power receiving side, power transmission is stopped.

  In addition, when the recharge confirmation command for the battery 94 is received from the power transmission device 10, the sequence control unit 124 on the power receiving side executes a process of transmitting a response command for the recharge confirmation command to the power transmission device 10 as a test sequence process. . Specifically, when a recharge confirmation command is received from the power transmission side, a response command including information indicating whether recharging is necessary or information indicating the value of the battery voltage is returned to the power transmission side. In this case, the response command may be returned without actually checking the battery voltage, or may be returned after checking. The sequence control unit 104 on the power transmission side also executes a process corresponding to the test sequence process on the power reception side. For example, when a recharge confirmation test mode is set, a command specifying the test mode is transmitted to the power receiving side, and then a recharge confirmation command is transmitted. When a response command for the recharge confirmation command is received from the power receiving side, power transmission is stopped.

  The sequence control unit 124 on the power receiving side executes the self test process as the test sequence process. Here, the self-test process is a process that combines a series of processes for testing. Specifically, in order to improve test efficiency and test time, the self-test process omits part of the normal sequence process and automatically performs a series of test processes without any external instructions. This is a process for execution. When the self-test mode is set, the power-transmission-side sequence control unit 104 also executes a process corresponding to the power-receiving-side self-test process.

  Note that the sequence control unit 124 may execute a process for transmitting detection information on the power receiving side to the power transmission device 10 as a test sequence process. For example, when position level information that informs whether or not the positional relationship between the primary coil L1 and the secondary coil L2 is appropriate, the above-described battery voltage information, and the like is detected on the power receiving side, this detection information is transmitted to the power transmission side in the test sequence process. Send to. By doing in this way, it becomes possible for the power transmission side to obtain detection information on the power receiving side without going through a complicated normal sequence.

  In FIG. 3, by providing the host I / Fs 27 and 57 on the power transmission side and the power reception side, communication between the power transmission side and power reception side hosts 2 and 4 is enabled. That is, in the conventional contactless power transmission system, only ID authentication information can be communicated between the power transmission side and the power reception side. On the other hand, according to the configuration of FIG. 3, for example, application data can be communicated between a power transmission side device such as a charger and a power reception side device such as a mobile phone using contactless power transmission. It becomes possible. Therefore, it is possible to communicate data between devices by effectively using the charging period and the like, so that the convenience for the user can be greatly improved.

  Specifically, in FIG. 3, it is assumed that a communication request command for requesting communication between the host 2 on the power transmission side and the host 4 on the power reception side is written to the register unit 23 by the host 2 via the host I / F 27. To do. In this case, the power transmission-side control unit 22 shifts to a communication mode in which communication is performed between the hosts 2 and 4 and transmits the communication request command to the power receiving device 40.

  On the other hand, when receiving a communication request command for requesting communication between the hosts 2 and 4 from the power transmission device 10, the control unit 52 on the power receiving side shifts to the communication mode. For example, when a communication request command is transmitted from the power transmission side, reception of the command is notified to the host 4 and the operation mode on the power reception side also shifts to the communication mode. As a result, communication between the hosts 2 and 4 becomes possible. Here, as the communication request command, an OUT transfer command for requesting data transfer from the power transmission side host 2 to the power reception side host 4, or an IN request for data transfer from the power reception side host 4 to the power transmission side host 2. There is a transfer command.

4). Operation Next, the operation of the present embodiment will be described. FIG. 5A to FIG. 6C are operation explanatory diagrams of the present embodiment in the normal sequence processing.

  First, as illustrated in FIG. 5A, the power transmission device 10 starts temporary power transmission (position detection power transmission) before starting normal power transmission. With this temporary power transmission, a power supply voltage is supplied to the power receiving device 40 and the power receiving device 40 is powered on. Temporary power transmission in this case is performed using the drive voltage and drive frequency of the power transmission side transmission condition information set in the information register 110. And the power receiving apparatus 40 determines whether the positional relationship of the primary coil L1 and the secondary coil L2 is appropriate, for example.

  Next, as shown in FIG. 5B, authentication processing is performed while maintaining transmission conditions for temporary power transmission between the power transmission side and the power reception side. Specifically, for example, a negotiation process and a setup process as described later are performed.

  When the authentication process between the power transmission side and the power reception side is properly completed, for example, a start frame is transmitted from the power reception side to the power transmission side. Accordingly, as shown in FIG. 5C, the power transmission side starts normal power transmission to the power receiving side, and charging of the battery 94 of the load 90 and the like starts.

  As shown in FIG. 6A, when the power receiving side detects full charge of the battery 94, a full charge detection command (full charge notification command) is transmitted to the power transmission side. Then, as shown in FIG. 6B, when the power transmission side receives the full charge detection command, the power transmission side shifts to a standby phase after full charge detection. Then, power transmission to the power receiving side is stopped, whereby the power receiving side is powered off, and power saving is realized.

  As shown in FIG. 6C, the power transmission side periodically performs temporary power transmission for recharging confirmation in the standby phase after the detection of full charge, and the battery 94 in the temporary power transmission period for recharging confirmation. Send a recharge confirmation command. Then, the power receiving side confirms the charging voltage of the battery 94 and transmits a response command for notifying the confirmation result (whether recharging is necessary or charging voltage) to the power transmitting side. Then, the power transmission side determines whether or not the battery 94 needs to be recharged based on the response command. As described above, by executing the recharge confirmation sequence periodically after full charge detection, it is possible to prevent a situation where power is wasted after full charge detection.

  In the present embodiment, when the test mode is set, a test sequence process different from the normal sequence process of FIGS. 5A to 6C is executed. For example, FIG. 7A shows an example of the test mode.

  For example, in the test mode 1, the power receiving side issues a full charge detection command immediately at the command branch. In test mode 2, the power transmission side immediately issues a recharge confirmation command at the command branch, and the power reception side returns a response command. In test mode 3, a self-test process that combines a series of processes for testing is executed.

  These test modes are set in the test mode setting register 220 of the test register 119 by the test circuit 28 as shown in FIG. That is, a flag indicating each test mode is written in the test mode setting register 220 by the test signal TEST and the test clock signal TMCK. Then, the set test mode designation information is transmitted to the power receiving side and written in the power receiving side test mode designation information register 230.

  Also, the test availability information indicating the test mode that can be handled by the power receiving side is stored in the test availability information register 232 on the power receiving side. Then, for example, in the authentication processing period (setup period), this test supportability information is transmitted to the power transmission side and written in the test supportability information register 222 on the power transmission side. Then, the power transmission side determines a test mode that can be supported by the power receiving side based on the test support availability information, and when the test mode set in the test mode setting register 220 is a test mode that can be supported by the power receiving side, The test mode designation information is transmitted to the power receiving side. If the test mode is not compatible, for example, the test mode processing is stopped.

  Note that the test mode realized by the present embodiment is not limited to the test modes 1, 2, and 3 in FIG. For example, a test mode for various commands such as a communication command and a power transmission stop request command may be provided.

  Next, the operation of the present embodiment in the test sequence process will be described with reference to FIGS. 8 (A) to 9 (C).

  As shown in FIG. 8A, when the power transmission device 10 starts temporary power transmission, a power supply voltage is supplied to the power reception device 40, and the power reception device 40 is powered on. Then, as shown in FIG. 8B, the power receiving side transmits the test supportability information stored in the test register 139 to the power transmission side, for example, in the setup phase described later.

  Next, as shown in FIG. 8C, for example, in the setup phase, the power transmission side transmits test mode designation information to the power reception side. Alternatively, in the command phase following the setup phase, the power transmission side issues a test mode designation command to transmit test mode designation information.

  As shown in FIG. 9A, when the test mode 1 is set, the power transmission side transmits a normal power transmission (charging) start command. Then, the power receiving side that has received the normal power transmission start command immediately transmits a full charge detection command to the power transmission side. That is, in the normal sequence, as shown in FIG. 5C and FIG. 6A, when the power receiving side receives a normal power transmission start command, it supplies power to the battery 94 of the load 90 and detects that the battery 94 is fully charged. Then, a full charge detection command is returned to the power transmission side. On the other hand, in FIG. 9A, even if the normal power transmission start command is received, the power supply to the battery 94 of the load 90 is not performed, and even if the full charge of the battery 94 is not detected, the full charge detection command To the power transmission side.

  As shown in FIG. 9B, when the test mode 2 is set, the power transmission side transmits a recharge confirmation command. Then, the power receiving side that has received the recharge confirmation command returns a response command (battery voltage) to the power transmitting side. That is, in the normal sequence, as shown in FIGS. 6 (A) to 6 (C), a full charge detection command is transmitted, and after passing through the standby phase sequence after full charge detection, recharging from the power transmission side to the power reception side is performed. A confirmation command is sent. On the other hand, in FIG. 9B, without going through such a sequence, the power transmission side transmits a recharge confirmation command to the power reception side, and the power reception side returns a response command to the power transmission side.

  As shown in FIG. 9C, when the test mode 3 is set, a self test process different from the normal sequence process is executed. This self-test process is a process in which processes corresponding to test items are arbitrarily combined in order to shorten the test time. In the test mode 3, the self-test process including this series of processes is automatically executed.

  For example, when it is attempted to check whether or not the full charge detection sequence has been properly executed, the full sequence of the battery 94 after the start of normal power transmission is detected in the normal sequences of FIGS. 5C and 6A. There is a need to. However, in the facing test of FIG. 2, a long time is required for the sequence transition, and the test time becomes long.

  On the other hand, in the test mode 1 in FIG. 9A, even if the full charge of the battery 94 is not actually detected, the full charge detection command is immediately returned by the power receiving side to the normal power transmission start command from the power transmission side. . Therefore, it can be efficiently inspected in a short time whether or not the full charge detection sequence is properly executed.

  Further, when it is attempted to check whether or not the recharge confirmation sequence has been properly executed, in the normal sequence of FIGS. 6A to 6C, the standby phase after full charge detection has been waited for to elapse. Later, it is necessary to detect transmission / reception of a recharge confirmation command and a response command. However, in the opposite test of FIG. 2, it is difficult to realize such a test, and even if it is realized, it takes a long time to wait for the standby phase, resulting in a long test time.

  On the other hand, in test mode 2 in FIG. 9B, a recharge confirmation command is transmitted from the power transmission side to the power reception side without passing through the standby phase after full charge detection, and a response command is returned from the power reception side. Therefore, it is possible to efficiently check in a short time whether or not the recharge confirmation sequence has been properly executed.

  Further, in the present embodiment, in order to cope with the secondary-side multi-power, the transmission conditions for contactless power transmission in the temporary power transmission period and the transmission conditions in the normal power transmission period are different. For example, in the temporary power transmission period, transmission conditions for temporary power transmission with low output voltage (low output power) that can communicate information are set. In the normal power transmission period, transmission conditions for normal power transmission according to the secondary rated power specifications are set. Set.

  Whether or not information can be properly communicated under the transmission conditions for temporary power transmission can be realized by confirming whether or not the authentication processing in the temporary power transmission period has been properly performed. However, whether or not information can be properly communicated under the transmission conditions for normal power transmission requires transition of a certain operation state such as full charge detection transition and data communication mode transition, and the test time is also very long.

  On the other hand, in FIG. 9A and FIG. 9B, after setting the test mode, the transmission condition is switched to the condition for normal power transmission, so that information (full charge detection command, It is possible to easily inspect whether or not the charge confirmation command and the response command) can be properly communicated, and the reliability of the test can be improved.

  Further, in normal sequence processing, it is difficult to perform a test with a series of self-test sequences in which sequence control is shortened and selected individual processes are combined.

  On the other hand, in FIG. 9C, since the self-test process combining any series of processes can be automatically executed, the test efficiency can be improved and the reliability can be improved.

  Further, according to the present embodiment, on the power receiving side, the test sequence process is started immediately upon the rise of the power supply by power reception. Accordingly, the test mode can be sequentially specified and executed in synchronization with the power transmission control from the primary side. For example, in the normal sequence, the authentication process is executed in a very short time and the process shifts to the normal power transmission mode. Therefore, it is difficult to specify the test mode sequentially in synchronization with the power transmission control from the primary side. It is.

  In FIG. 3, host interfaces 27 and 57 for communicating with the hosts 2 and 4 are provided. Therefore, by accessing the predetermined registers of the register units 23 and 53, it becomes possible to easily confirm the execution results of the test modes of FIGS. 9A to 9C.

  Further, as shown in FIG. 8B, the power receiving side can inform the power transmitting side in advance of the test mode group in which it can behave using the test supportability information during the setup process or the like. Multi-power transmission on the side becomes easy.

  In this embodiment, since the process shifts to the test sequence process at the command branch after the start frame, various test sequence processes can be optionally added / deleted, and various tests can be handled.

  Thus, according to the present embodiment, the test time can be greatly shortened by a simpler method in the facing test as shown in FIG. In addition, the self-test function can be implemented in the opposing test, and it can easily cope with the automation of inspection.

5). Processing sequence of non-contact power transmission When non-contact power transmission becomes widespread, it is expected that various types of secondary coils on the power receiving side will be put on the market. That is, since the outer shape and size of an electric device such as a mobile phone on the power receiving side are various, the outer shape and size of the secondary coil incorporated in the power receiving device of the electronic device are also varied accordingly. In addition, since the amount of electric power (wattage) and output voltage for contactless power transmission required by each electronic device are various, the inductance of the secondary coil and the like vary accordingly.

  On the other hand, in non-contact power transmission, even if the shapes and sizes of the primary coil and the secondary coil are not completely adapted, a situation occurs in which power is transmitted. In this regard, in charging using a wired cable, such a situation can be prevented by devising the shape of the connector of the cable and the like, but it is difficult to apply such a devising in non-contact power transmission. Currently, contactless power transmission is realized by individual methods for each manufacturer.

  However, in order to promote the spread of contactless power transmission and to ensure the safety associated therewith, it is desirable to realize a highly versatile contactless power transmission processing sequence.

  FIG. 10 schematically shows a processing sequence of contactless power transmission realized by the present embodiment.

  In this processing sequence, after the reset state, the process proceeds to the standby phase. Here, in the reset state, various flags held by the power transmission side (primary) and the power reception side (secondary) are cleared. Here, the flag represents the state of the power transmission device or the power reception device (power transmission state, full charge state, recharge confirmation state, etc.), and is held in the register unit of these devices.

  In the standby phase, the power transmission side (primary) holds the final state when the power reception side (secondary) is stopped (when power transmission is stopped). For example, when full charge of the battery is detected, the power transmission side and the power reception side shift to a standby phase after full charge detection. In this case, since it is necessary to perform recharging by detecting a decrease in battery voltage, the power transmission side stores that the cause of power transmission stop is full charge detection. Specifically, the recharge confirmation flag is maintained in the set state without being cleared, and it is periodically confirmed whether or not recharge is necessary.

  In the standby phase, since power transmission from the power transmission side to the power reception side stops, the power reception side is stopped without being supplied with power supply voltage, but the power transmission side is in operation with power supply voltage supplied. . In this way, the power receiving side stops the operation in the standby phase, so that the power consumption can be reduced.At this time, the power transmission side holds the flags of various states without clearing, so that the power transmission side has the flag after the standby phase. Various processes can be executed using.

  The power transmission side and the power reception side shift to the negotiation phase after the standby phase. In this negotiation phase, a negotiation process is performed in which standard / coil / system matching is confirmed, safety information is exchanged, and the like. Specifically, the power transmission side and the power reception side exchange information on standard / coil / system information, and confirm whether the standard / coil / system is compatible with each other. In addition, for example, the power receiving side transmits safety threshold information for foreign object detection or the like to the power transmission side, and performs safety information exchange. In this negotiation process, whether or not information communication is possible between the power transmission side and the power reception side, whether or not the communicated information is valid, and whether or not the load state on the power reception side is appropriate (foreign matter non-detection) Will be confirmed.

  In the negotiation process, when it is determined that the standards / coils / systems do not match, a foreign object is detected, removal of a device is detected, or a time-out error occurs, the process proceeds to a reset state, and various flags are cleared. On the other hand, in the case of a communication error or the like, for example, the process proceeds to the standby phase, and the flag is not cleared.

  The power transmission side and the power reception side shift to the setup phase after the negotiation phase. In this setup phase, a setup process is executed in which setup information such as information on the corresponding function and setting information for each application is transferred. For example, based on the result of the negotiation process, the authentication process is performed and the transmission condition is specified. Specifically, when the power receiving side transmits transmission condition information such as the coil driving voltage and driving frequency to the power transmission side, the power transmission side performs normal power transmission such as the coil driving voltage and driving frequency based on the received transmission condition information. Stores the transmission conditions for In addition, this setup process also exchanges information about supported functions and exchanges of setting information that differs for each higher-level application. Specifically, threshold information for detecting the load state on the power receiving side after the start of normal power transmission (for example, threshold information for data communication / foreign object detection), and is issued / executed by the power transmitting side and the power receiving side in the command phase Information exchange regarding additional command functions such as the types of possible commands, communication functions, and periodic authentication functions is executed in this setup process. This makes it possible to exchange different setting information according to the application such as the type of electronic device (mobile phone, audio device, etc.) and model.

  In the setup process, when the removal of the device is detected or a time-out error occurs, a transition is made to the reset state. On the other hand, in the case of a communication error or the like, the process proceeds to a standby phase.

  The power transmission side and the power reception side shift to the command phase after the setup phase. In this command phase, command processing is performed based on information obtained by the setup processing. That is, a corresponding command (a command that has been confirmed by the setup process to be compatible) is issued or executed. As commands executed in the command processing, for example, a normal power transmission (charge) start command, a full charge detection (notification) command, a recharge confirmation command, a communication command, a power reception side interrupt command, a power transmission stop request command, and the like can be considered.

  For example, when preparation for normal power transmission is completed by negotiation processing and setup processing, the power transmission side sends (issues) a normal power transmission (charge) start command to the power receiving side, and the power receiving side that receives it sends a response command to the power transmission side. The conditions change and normal power transmission starts. When full charge is detected on the power receiving side after the start of normal power transmission, the power receiving side transmits a full charge detection command to the power transmission side.

  When it is not necessary to continue transmission as in this full charge detection, the process proceeds to a standby phase after full charge detection. Then, again through the negotiation process and the setup process, the power transmitting side transmits a recharge confirmation command to the power receiving side. As a result, the power receiving side checks the battery voltage to determine whether recharging is necessary. If recharge is required, the recharge confirmation flag is reset, the process proceeds to the negotiation phase, and after the authentication process and the setup process are performed, the power transmission side issues a normal power transmission start command. Resumed. On the other hand, when recharge is not necessary, the recharge confirmation flag is maintained in the set state, and the process returns to the standby phase after full charge is detected.

  The processing sequence of this embodiment will be described more specifically with reference to FIG. In the standby phase after the removal detection indicated by F1, for example, landing detection is performed once every k1 seconds. When the landing (installation) of the electronic device is detected as indicated by F2, negotiation processing and setup processing are executed. Then, as shown in F3, when the negotiation process and the setup process are normally completed and a normal power transmission start command is issued in the command process, normal power transmission is started, and charging of the electronic device is started. When full charge is detected as indicated by F4, the LED of the electronic device is turned off, and the process proceeds to a standby phase after detection of full charge as indicated by F5.

  In the standby phase after full charge detection, for example, removal detection is performed once every k3 seconds and recharge confirmation is performed once every k3 × j seconds. When the removal of the electronic device is detected in the standby phase after the detection of full charge as indicated by F6, the process proceeds to the standby phase after the detection of removal. On the other hand, in the standby phase after full charge detection, if it is determined that recharging is necessary by recharging confirmation as shown in F7, negotiation processing and setup processing are performed, normal power transmission is resumed, Recharging is performed. If removal of an electronic device is detected during normal power transmission as indicated by F8, the process proceeds to a standby phase after removal detection.

  According to the processing sequence of the present embodiment described above, for example, determination of compatibility of standards / coils / systems and minimum information exchange for safety are performed in the negotiation processing. In this negotiation process, it is determined that communication is possible and the validity of the communication information, and the suitability of the load state on the power receiving side is determined.

  In the setup process, transmission conditions necessary for normal power transmission are set. For example, the driving voltage and driving frequency of the coil are set. In addition, the transfer of threshold information for detecting the load state after the start of normal power transmission, the exchange of information about additional support functions, and the exchange of setting information required for each higher-level application are performed in the setup process. The

  Then, after undergoing such a setup process and negotiation process, the process proceeds to the command phase and the command process is performed. That is, the command processing that is confirmed to be compatible in the negotiation processing and the setup processing is performed in the command processing.

  In this way, the minimum information exchange necessary for ensuring the compatibility and safety of the system is executed in the negotiation process, and the exchange of setup information that differs for each application is executed in the setup process. Therefore, when the power transmission side and the power reception side are not compatible, since they are excluded in the negotiation process, it is not necessary to transfer setup information with a large amount of information. Thus, only a minimum amount of information needs to be transferred in the negotiation process, and the amount of transfer information can be reduced. Therefore, the negotiation phase can be completed in a short period of time, and the process can be made efficient.

  In addition, each device on the power transmission side and the power reception side can perform the minimum contactless power transmission by the negotiation process, and the function expansion for each device can be realized by exchanging setup information. Therefore, each device performs the minimum setting necessary for the contactless power transmission system by the negotiation process, and the system can be optimized by the setup process, so that a flexible system construction can be realized.

  In addition, the power transmission side can receive non-contact power transmission and foreign object detection simply by receiving threshold information and system information from the power receiving side and setting the received threshold information and system information. Can be simplified. In this case, the power receiving side transmits appropriate combination of coil information and threshold information to the power transmission side, so that proper and safe contactless power transmission can be realized.

  Next, details of negotiation processing, setup processing, and the like will be described. In FIG. 12A, the negotiation processing units 202 and 212 perform contactless power transmission negotiation processing. That is, information about basic settings (standard, coil, system, safety function, etc.) of contactless power transmission is exchanged between the power transmission side and the power reception side. Then, the setup processing units 204 and 214 perform contactless power transmission setup processing based on the result of the negotiation processing. In other words, after the basic setting of contactless power transmission is performed by the negotiation process, different setup information is exchanged for each device and application between the power transmission side and the power reception side. Then, the command processing units 206 and 216 perform contactless power transmission command processing after the setup processing. In other words, basic commands and commands that can be handled by the setup process are issued and executed.

  Next, the operation of this embodiment when the processing sequence of FIG. 10 is applied will be described with reference to FIGS. 12 (A) to 13 (C).

  After temporary power transmission is started as shown in FIG. 12A, the power receiving device 40 creates a negotiation frame and transmits it to the power transmitting device 10 as shown in FIG. 12B. This negotiation frame includes, for example, standard / coil / system information and foreign substance threshold information.

  When the power transmission apparatus 10 receives the negotiation frame from the power reception apparatus 40, the power transmission side standard / coil / system information included in the received negotiation frame and the power transmission side standard / coil / system information stored in the register unit 23 are received. Match. Then, a negotiation frame including standard / coil / system information on the power transmission side is created and transmitted to the power receiving apparatus 40.

  Then, the power receiving device 40 collates the standard / coil / system information on the power receiving side with the standard / coil / system information of the received negotiation frame. Then, as illustrated in FIG. 12C, the power receiving device 40 creates a setup frame and transmits the setup frame to the power transmitting device 10. This setup frame includes, for example, transmission condition information such as a coil driving voltage and driving frequency, and corresponding function information indicating functions (commands and the like) supported by the power receiving side.

  When the power transmission device 10 receives the setup frame, the power transmission device 10 sets transmission conditions for normal power transmission based on the transmission condition information received from the power receiving side. Further, based on the received function information on the power receiving side, it is determined whether or not the corresponding function is compatible between the power transmission side and the power receiving side. Then, a setup frame including the corresponding function information on the power transmission side is created and transmitted to the power receiving device 40. Then, the power receiving side determines whether or not the corresponding function is compatible between the power transmission side and the power receiving side based on the received corresponding function information on the power transmission side.

  Next, command processing is performed based on the result of the setup processing. That is, as shown in FIG. 13A, after the start frame, the process proceeds to the command branch, and the branch destination command is executed. In the normal operation mode, as shown in FIG. 13B, for example, a normal power transmission start command is transmitted in the command branch, and the process proceeds to a normal power transmission sequence.

  On the other hand, in the test mode, for example, a test mode designation command is issued as shown in FIG. Then, in the command branch, the process proceeds to a test sequence process corresponding to the issued test mode designation command.

  As described above, in the present embodiment, the sequence control units 104 and 124 shift to the test sequence process corresponding to the test mode designation command in the command branch in the command process. That is, when the power receiving side receives a test mode designation command as test mode designation information from the power transmitting apparatus 10, the process proceeds to a test sequence process designated by the test mode designation command in the command branch.

6). Detailed Configuration Example FIG. 14 shows a detailed configuration example of the present embodiment. In the following, the components described in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The waveform monitor circuit 14 generates an induced voltage signal PHIN for waveform monitoring based on the coil end signal CSG of the primary coil L1. The display unit 16 displays various states of the contactless power transmission system (during power transmission, ID authentication, etc.) using colors, images, and the like. The oscillation circuit 24 generates a primary side clock. The drive clock generation circuit 25 generates a drive clock that defines the drive frequency. The driver control circuit 26 generates a control signal having a desired frequency based on the drive clock from the drive clock generation circuit 25, the frequency setting signal from the control unit 22, and the like, and the first and second power transmissions of the power transmission unit 12. Output to the driver to control the first and second power transmission drivers.

  The load state detection circuit 30 shapes the induced voltage signal PHIN to generate a waveform shaping signal. For example, a square wave (rectangular wave) waveform shaping signal (pulse signal) that becomes active (eg, H level) when the signal PHIN exceeds a given threshold voltage is generated. The load state detection circuit 30 detects pulse width information (pulse width period) of the waveform shaping signal based on the waveform shaping signal and the drive clock, and detects the load state on the power receiving side.

  The load state detection circuit 30 is not limited to the pulse width detection method (phase detection method), and various methods such as a current detection method and a peak voltage detection method can be employed.

  The control unit 22 (power transmission control device) determines the load state (load fluctuation, load level) on the power receiving side (secondary side) based on the detection result in the load state detection circuit 30. For example, the control unit 22 determines the load state on the power receiving side based on the pulse width information detected by the load state detection circuit 30 (pulse width detection circuit), for example, data (load) detection, foreign object (metal) detection, Perform removal (detachment) detection.

  The power receiving unit 42 converts the AC induced voltage of the secondary coil L2 into a DC voltage. This conversion is performed by a rectifier circuit 43 included in the power receiving unit 42.

  The load modulation unit 46 performs load modulation processing. Specifically, when desired data is transmitted from the power receiving device 40 to the power transmitting device 10, the load at the load modulation unit 46 (secondary side) is variably changed according to the transmission data, and the primary coil L1 The signal waveform of the induced voltage is changed. For this purpose, the load modulation section 46 includes a resistor RB3 and a transistor TB3 (N-type CMOS transistor) provided in series between the nodes NB3 and NB4. The transistor TB3 is ON / OFF controlled by a signal P3Q from the control unit 52 of the power reception control device 50. When the load modulation is performed by controlling on / off of the transistor TB3, the transistor TB2 of the power supply control unit 48 is turned off, and the load 90 is not electrically connected to the power receiving device 40.

  The power supply control unit 48 controls power supply to the load 90. The regulator 49 adjusts the voltage level of the DC voltage VDC obtained by the conversion in the rectifier circuit 43, and generates a power supply voltage VD5 (for example, 5V). The power reception control device 50 operates by being supplied with the power supply voltage VD5, for example.

  The transistor TB2 (P-type CMOS transistor, power supply transistor) is controlled by a signal P1Q from the control unit 52 of the power reception control device 50. Specifically, the transistor TB2 is turned off during the negotiation process and the setup process, and is turned on after the normal power transmission is started.

  The position detection circuit 56 determines whether the positional relationship between the primary coil L1 and the secondary coil L2 is appropriate. The oscillation circuit 58 generates a secondary clock. The frequency detection circuit 60 detects the frequency (f1, f2) of the signal CCMPI. The full charge detection circuit 62 detects whether or not the battery 94 (secondary battery) of the load 90 is in a fully charged state (charged state). The load 90 includes a charge control device 92 that performs charge control of the battery 94 and the like.

7). Detailed Operation Example Next, a detailed operation example of the present embodiment will be described. 15 to 17 are flowcharts showing detailed operation examples in the normal sequence. In FIG. 15, the left column is the power transmission side processing flow, and the right column is the power reception side processing flow.

  As shown in FIG. 15, when the power transmission side is turned on and powered on, the power transmission side performs temporary power transmission before the start of normal power transmission (step S2), for example, after a wait of k1 seconds (step S1).

  The power receiving side is powered on by temporary power transmission from the power transmitting side (step S22). Then, the power reception control device 50 sets the signal P1Q to the H level and turns off the transistor TB2.

  Next, the power receiving side uses the position detection circuit 56 to determine the positional relationship between the primary coil L1 and the secondary coil L2, and acquires position level information (step S24). Then, regardless of whether the positional relationship is proper or not, a negotiation frame is generated and transmitted to the power transmission side (step S25).

  When the power transmission side receives the negotiation frame (step S4), it verifies the negotiation frame (step S5). Specifically, it is determined whether the standard / coil / system information stored in the register unit 23 on the power transmission side and the standard / coil / system information received from the power reception side are a combination of the applicable ranges. Further, the positional relationship between the primary coil L1 and the secondary coil L2 is also determined based on the position level information added to the negotiation frame. If it is determined that the frame is an appropriate negotiation frame, foreign object detection is performed (step S6).

  Next, the power transmission side creates a negotiation frame and transmits it to the power reception side (step S7). This negotiation frame includes, for example, standard information, coil information, and system information stored in the register unit 23 on the power transmission side.

  When the power receiving side receives the negotiation frame (step S26), it verifies the negotiation frame (step S27). Specifically, it is determined whether the standard / coil / system information stored in the power receiving side register unit 53 and the standard / coil / system information received from the power transmission side are a combination of the applicable ranges. Further, the positional relationship between the primary coil L1 and the secondary coil L2 is determined again, and position level information and corresponding test information are acquired. When it is determined that the frame is an appropriate negotiation frame, a setup frame is generated and transmitted to the power transmission side (step S28). The setup frame includes communication condition information, transmission condition information, corresponding function information, and the like and position level information. Here, the communication condition information includes a communication method and communication parameters. The transmission condition information is the driving voltage and driving frequency of the primary coil. The corresponding function information is information representing a function added for each application.

  When receiving the setup frame (step S8), the power transmission side verifies the setup frame (step S9). If the setup frame from the power receiving side is appropriate, a power transmission side setup frame is created and transmitted to the power receiving side (step S10). In this case, test mode designation information may be included in the setup frame.

  When receiving the setup frame (step S29), the power receiving side verifies the setup frame (step S30). If the setup frame is appropriate, a start frame is created and transmitted to the power transmission side (step S31).

  When the start frame is transmitted, the power transmission side and the power reception side shift to a command branch. That is, command determination is performed, and the process branches to command processing according to various flags.

  FIG. 16 is a flowchart showing processing on the power transmission side after command branching. As shown in FIG. 16, the power transmission side has no command (communication request, interrupt, power transmission stop, recharge confirmation flag = 1, etc.) requiring priority processing in the command branch of step S41. Transmits a normal power transmission (charging) start command to the power receiving side (step S42). When the response command is received from the power receiving side, the positional relationship between the primary coil L1 and the secondary coil L2 is confirmed based on the position level information added to the response command (step S43). Then, the transmission condition and the communication condition are switched to the conditions for normal power transmission (step S44). Specifically, the transmission conditions and communication conditions set in the setup process are switched. Then, periodic authentication is turned on (step S45), and normal power transmission is started (step S46).

  The power transmission side detects a takeover state due to a large-sized metal foreign object or the like in a periodic authentication period by periodic load modulation after normal power transmission is started (step S47). Also, removal detection and foreign object detection are performed (steps S48 and S49).

  Next, the power transmission side determines whether or not a power transmission stop command (STOP command) has been received from the host 4 on the power receiving side (step S50). Further, it is determined whether or not an interrupt command (INT command) from the power receiving side host 4 has been received (step S51). Further, it is determined whether or not there is a host communication request (OUT / IN transfer command) from the power transmission side host 2 (step S52).

  If there is no reception or request for these commands, the power transmission side determines whether or not a full charge detection command (save frame) has been received from the power reception side (step S53). Returns to step S47. On the other hand, when received, the periodic authentication is turned off and power transmission is stopped (steps S54 and S55). Then, the process proceeds to a standby phase after full charge detection (step S56).

  In the standby phase after detection of full charge, for example, removal is detected once every k3 seconds (step S57). When removal is detected, the recharge confirmation flag is reset to 0 (step S60), power transmission is stopped, and the process returns to step S1. In the standby phase after full charge detection, for example, once every k3 × j seconds, recharge is confirmed, the recharge confirmation flag is set to 1 (steps S58 and S59), power transmission is stopped, and the process proceeds to step S1. Return.

  When the recharge confirmation flag is set to 1 in step S59, negotiation processing and setup processing are performed after returning to step S1. And in the command branch of step S41, since the recharge confirmation flag is 1, it transfers to the process of recharge confirmation mode.

  Specifically, the power transmission side transmits a recharge confirmation command to the power reception side (step S61). When a response command for the recharge confirmation command is received from the power receiving side (step S62), it is determined whether or not the battery 94 needs to be recharged based on the battery voltage check result received together with the response command (step S62). S63). If it is determined that recharging is necessary, power transmission for recharging confirmation (temporary power transmission) is stopped (step S64), a recharging confirmation flag is set to 0, and the process returns to step S1. On the other hand, if it is determined that recharging is not necessary, power transmission for recharging confirmation is stopped (step S65), and the process returns from the recharging confirmation mode to the standby mode after detecting full charge (steps S56 to S58). .

  If the power transmission side determines that a power transmission stop command or interrupt command has been received in steps S50 and S51, or if it is determined that a communication request has been received from the host 2 in step S52, the transmission conditions or communication conditions for contactless power transmission Is switched from normal power transmission to communication mode conditions (temporary power transmission conditions) (step S66). For example, the drive frequency and the drive voltage are switched, and the threshold parameter for detecting the load state on the power receiving side is switched. Then, the process proceeds to a command branch in step S41.

  For example, if it is determined in step S52 that there is a communication request from the host 2 on the power transmission side, the process branches to the communication mode processing by the host request in the command branch of step S41. Then, the process proceeds to steps S67 to S71.

  If it is determined in step S51 that an interrupt command (INT command) has been received from the power receiving side, the process branches to the communication mode processing by the power receiving side interrupt command in the command branch of step S41. And after the process of step S72-S74 is performed, it transfers to the process of step S68-S71.

  If it is determined in step S50 that a power transmission stop command (STOP command) has been received from the power receiving side, the process branches to power transmission stop command processing in the command branch of step S41. Then, steps S75 to S78 are executed.

  FIG. 17 is a flowchart showing processing on the power receiving side after command branching. As shown in FIG. 17, the power receiving side has no other command (communication request, interrupt, power transmission stop, etc.) requiring priority processing in the command branch of step S81, and the normal power transmission start command from the power transmission side. Is received (step S82), the positional relationship between the primary coil L1 and the secondary coil L2 is determined again, and position level information that is positional relationship information is acquired (step S83). Then, the response command to which the position level information is added is transmitted to the power transmission side (step S84).

  After receiving the response command, the power receiving side turns on the transistor TB2 of the power supply control unit 48 (step S85), and starts supplying power to the load 90. Further, periodic authentication is turned on, and periodic load modulation is performed (step S86).

  Next, the power receiving side determines whether or not there is a power transmission stop request (STOP command) from the host 4 on the power receiving side (step S87). Further, it is determined whether or not there is an interrupt request (INT command) from the host 4 on the power receiving side (step S88). Further, it is determined whether or not a communication request command (OUT / IN transfer command) from the power transmission side host 2 has been received (step S89).

  When the power receiving side does not receive these requests or commands, the power receiving side detects whether or not the battery 94 is fully charged (step S90). If full charge is not detected, the process returns to step S87. On the other hand, when full charge is detected, the transistor TB2 is turned off (step S91), and power supply to the load 90 is stopped. Also, the periodic authentication is turned off (step S92). Then, a full charge detection command (save frame) for notifying the detection of full charge is transmitted to the power transmission side (step S93). After a wait period of k5 seconds (step S94), the process returns to step S93 and the process is repeated.

  When the power transmission side starts power transmission for recharging confirmation (temporary power transmission), the power receiving side is reset to power-on, and performs negotiation processing and setup processing. When the recharge confirmation command (see step S61) transmitted by the power transmission side is received, the process proceeds to the recharge confirmation mode in the command branch of step S81.

  Specifically, the power receiving side checks the battery voltage (step S95), and transmits a response command to the recharge confirmation command and a check result of the battery voltage to the power transmission side (step S96). The power is turned off when the power transmission for recharging confirmation stops.

  If the power receiving side determines that there is a power transmission stop request or interrupt request from the host 4 in steps S87 and S88, or if it is determined that a communication request command is received in step S89, the power receiving transistor TB2 is set. In addition to turning off, periodic authentication is also turned off (step S97). Then, the transmission condition and the communication condition are switched to the conditions for the communication mode (step S98), and the process proceeds to the command branch of step S81.

  For example, if it is determined in step S89 that a communication request command (OUT / IN transfer command) has been received from the power transmission side, the process branches to a communication mode process in response to a communication request from the power transmission side in the command branch of step S81. . Then, the process proceeds to steps S102 to S104.

  If it is determined in step S88 that an interrupt request has been received from the host 4 on the power receiving side, the process branches to a communication mode process in response to the interrupt request on the power receiving side in the command branch in step S81. Then, the process proceeds to steps S99 to S104.

  If it is determined in step S87 that there is a power transmission stop request from the host 4 on the power receiving side, the process branches to a process according to a power transmission stop request in the command branch of step S81. Then, a power transmission stop command is transmitted to the power transmission side (step S105), and the power is turned off when the power transmission is stopped.

  FIG. 18 is a flowchart for explaining the operation on the power transmission side when the test sequence process is performed in the command branch.

  When the test mode 1 is set in the test register 119 on the power transmission side, the process proceeds to a test sequence process corresponding to the test mode 1 in the command branch of step S41. Specifically, a TEST1 command is transmitted to the power receiving side (step S111). When a response command for the TEST1 command is received from the power receiving side, a normal power transmission (charging) start command is transmitted (steps S112 and S113).

  Next, when a response command for the normal power transmission start command is received from the power receiving side, the normal power transmission condition is switched (steps S114 and S115). Then, it is determined whether or not a full charge detection command has been received. If received, power transmission is stopped (steps S116 and S117).

  If the test mode 2 is set, the process proceeds to a test sequence process corresponding to the test mode 2 in the command branch. Specifically, a test mode TEST2 command is transmitted (step S121). When a response command is received from the power receiving side, a recharge confirmation command is transmitted (steps S122 and S123). Next, when a response command is received from the power receiving side, power transmission is stopped (steps S124 and S125).

  If the test mode 3 is set, the process shifts to a self-test process that is a test sequence process corresponding to the test mode 3 in the command branch. Specifically, a command for test mode TEST3 is transmitted (step S131). When a response command is received from the power receiving side, a normal power transmission start command is transmitted (steps S132 and S133).

  Next, when a response command is received, it switches to the conditions for normal power transmission (steps S134 and S135). When a full charge detection command is received, the communication mode condition is switched to and a recharge confirmation command is transmitted (steps S136, S137, and S138). When a response command is received, processing for confirming the data communication operation is performed if necessary (steps S139 and S140). Then, power transmission is stopped (step S141).

  FIG. 19 is a flowchart for explaining the operation on the power receiving side when the test sequence process is performed in the command branch.

  In the case of the test mode 1, the test sequence process corresponding to the test mode 1 is executed in the command branch of step S81. Specifically, when the TEST1 command is received from the power transmission side, the response command is transmitted to the power transmission side (steps S151 and S152). When a normal power transmission start command is received from the power transmission side, a response command is transmitted (steps S153 and S154).

  Next, after adjusting the waiting time by the timer, a command for full charge detection is transmitted, and if necessary, a full charge detection command is transmitted every k5 seconds (steps S155, S156, S157).

  In the case of the test mode 2, the test sequence process corresponding to the test mode 2 is executed in the command branch. Specifically, when the TEST2 command is received from the power transmission side, the response command is transmitted to the power transmission side (steps S161 and S162). When the recharge confirmation command is received, the battery voltage is checked if necessary, and a response command of the recharge confirmation command including the check result is transmitted to the power transmission side (steps S163, S164, and S165). As a result, the detection information on the power receiving side can be transmitted to the power transmission side in the test mode (for example, at the time of failure analysis).

  In the case of the test mode 3, a self test process which is a test sequence process corresponding to the test mode 3 is executed in the command branch. Specifically, when a TEST3 command is received from the power transmission side, the response command is transmitted (steps S171 and S172). When the normal power transmission start command is received, the full charge detection command is transmitted after adjusting the waiting time by the timer (steps S173, S174, S175).

  Next, after waiting for switching to the condition for the communication mode and receiving a recharge confirmation command, for example, a battery voltage check process is performed and a response command is transmitted to the power transmission side (steps S176, S177, S178, S179). Next, if necessary, an arbitrary operation such as LED blinking confirmation is performed (step S180). And power transmission is complete | finished (step S181).

  As shown in FIGS. 18 and 19, in this embodiment, in the command branch after the start frame, the process shifts to each test sequence process corresponding to each test mode. In this case, in the present embodiment, the test sequence processing is branched from the command branch, so that necessary test sequence processing can be optionally added / deleted, and various tests can be realized.

  The self-test processing shown in steps S131 to S141 in FIG. 18 and steps S171 to S181 in FIG. 19 eliminates unnecessary processing from the complicated normal sequence processing as shown in FIGS. 16 and 17, and is optimal for testing. This is realized by combining these processes. Therefore, by executing this self-test process, a desired inspection can be automatically executed efficiently in a short time.

  Although the present embodiment has been described in detail as described above, it will be easily understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. Accordingly, all such modifications are intended to be included in the scope of the present invention. For example, a term described together with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term anywhere in the specification or the drawings. All combinations of the present embodiment and the modified examples are also included in the scope of the present invention. Further, the configuration and operation of the power reception control device, power reception device, power transmission control device, power transmission device, test sequence processing, normal sequence processing, test mode setting processing, authentication processing, and the like are not limited to those described in this embodiment. Various modifications are possible.

L1 primary coil, L2 secondary coil, 2 hosts (power transmission side), 4 hosts (power reception side),
10 power transmission device, 12 power transmission unit, 14 waveform monitor circuit, 16 display unit,
20 power transmission control device, 22 control unit (power transmission side), 23 register unit, 24 oscillation circuit,
25 drive clock generation circuit, 26 driver control circuit, 27 host I / F,
28 test circuit, 30 load state detection circuit, 40 power receiving device, 42 power receiving unit,
43 rectifier circuit, 46 load modulation unit, 48 power supply control unit, 50 power reception control device,
52 control unit (power receiving side), 53 register unit, 56 position detection circuit,
57 host I / F, 58 oscillation circuit, 59 detection circuit, 60 frequency detection circuit,
62 full charge detection circuit, 90 load, 92 charge control device, 94 battery,
100 power transmission control unit, 102 transmission processing unit, 103 reception processing unit,
104 sequence control unit, 106 detection determination unit, 108 use function setting unit,
110 Information register, 112 Status register,
114 command registers, 116 interrupt registers,
118 data register, 119 test register, 120 power reception control unit,
122 transmission processing unit, 123 reception processing unit, 124 sequence control unit,
126 detection determination unit, 128 used function setting unit, 130 information register,
132 Status register, 134 Command register,
136 interrupt register, 138 data register, 139 test register,
202, 212 negotiation processing unit, 204, 214 setup processing unit,
206, 216 Command processing unit

Claims (18)

Provided in the power receiving device of the non-contact power transmission system that electromagnetically couples the primary coil and the secondary coil to transmit power from the power transmitting device to the power receiving device and supply power to the load of the power receiving device. A power reception control device,
A reception processing unit that performs reception processing of information from the power transmission device;
A sequence control unit that performs sequence control of the power reception control device,
The reception processing unit
Receiving test mode designation information from the power transmission device;
The sequence controller is
A power reception control device that executes a test sequence process different from the normal sequence process based on the received test mode designation information. In claim 1,
Including a transmission processing unit for performing transmission processing of information to the power transmission device,
The transmission processing unit
A power reception control apparatus, wherein test power availability information notifying a test mode that can be supported by the power reception control apparatus is transmitted to the power transmission apparatus. In claim 1 or 2,
The sequence controller is
A power reception control device, wherein a process for transmitting a full charge detection command to the power transmission device is detected as the test sequence processing without detecting a full charge of a battery included in the load of the power reception device. In any of claims 1 to 3,
The sequence controller is
When a battery recharge confirmation command for the battery of the power receiving apparatus is received from the power transmission apparatus, a process for transmitting a response command of the recharge confirmation command to the power transmission apparatus is executed as the test sequence process A power reception control device. In any of claims 1 to 4,
The sequence controller is
A power reception control device, wherein a self-test process combining a series of processes for a test is executed as the test sequence process. In any of claims 1 to 5,
The sequence controller is
A power receiving control device, wherein processing for transmitting detection information on a power receiving side to the power transmitting device is executed as the test sequence processing. In any one of Claims 1 thru | or 6.
Including a command processing unit for command processing,
The sequence controller is
In the command branch in the command processing, the power reception control device shifts to a test sequence processing according to the test mode designation information. In claim 7,
The sequence controller is
When receiving a test mode designation command as the test mode designation information from the power transmission apparatus, the power branching control apparatus shifts to a test sequence process designated by the test mode designation command in the command branch. In claim 7,
A negotiation processing unit for performing a contactless power transmission negotiation process;
A setup processing unit that performs a setup process for contactless power transmission based on a result of the negotiation process,
The reception processing unit
In the setup process, the test mode designation information is received from the power transmission device. A power reception control device according to any one of claims 1 to 9,
And a power receiving unit that converts an induced voltage of the secondary coil into a DC voltage. The power receiving device according to claim 10;
An electronic apparatus comprising: a load to which power is supplied by the power receiving device. Provided in the power transmission device of the non-contact power transmission system that electromagnetically couples the primary coil and the secondary coil to transmit power from the power transmission device to the power reception device and supplies power to the load of the power reception device. A power transmission control device,
A transmission processing unit for performing transmission processing of information to the power receiving device;
A sequence control unit that performs sequence control of the power transmission control device,
When the test mode is set, the sequence control unit executes a test sequence process corresponding to the test mode, and the transmission processing unit transmits test mode designation information to the power receiving apparatus. Power transmission control device. In claim 12,
A reception processing unit that performs reception processing of information from the power receiving device;
The transmission processing unit
When the reception processing unit receives test support availability information that informs a test mode that can be handled by the power reception control device, the test mode designation information that is determined to be supported by the test support availability information is sent to the power reception device. A power transmission control device characterized by transmitting. In claim 12 or 13,
Including a command processing unit for command processing,
The sequence controller is
In the command branch in the command processing, the power transmission control device shifts to test sequence processing corresponding to the test mode. In claim 14,
The sequence controller is
A power transmission control device that performs processing for transmitting a test mode designation command corresponding to the test mode as the test mode designation information to the power receiving device. In claim 14,
A negotiation processing unit for performing a contactless power transmission negotiation process;
A setup processing unit that performs a setup process for contactless power transmission based on a result of the negotiation process,
The transmission processing unit
In the setup process, the test mode designation information is transmitted to the power receiving device. A power transmission control device according to any one of claims 12 to 16,
And a power transmission unit that generates an AC voltage and supplies the AC voltage to the primary coil.   An electronic apparatus comprising the power transmission device according to claim 17.

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