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WO2015126103A1 - Émetteur d'énergie sans fil et procédé de commande d'un émetteur d'énergie sans fil - Google Patents

Émetteur d'énergie sans fil et procédé de commande d'un émetteur d'énergie sans fil Download PDF

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Publication number
WO2015126103A1
WO2015126103A1 PCT/KR2015/001476 KR2015001476W WO2015126103A1 WO 2015126103 A1 WO2015126103 A1 WO 2015126103A1 KR 2015001476 W KR2015001476 W KR 2015001476W WO 2015126103 A1 WO2015126103 A1 WO 2015126103A1
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WO
WIPO (PCT)
Prior art keywords
wireless power
power
power transmitter
transmitter
receiver
Prior art date
Application number
PCT/KR2015/001476
Other languages
English (en)
Korean (ko)
Inventor
송금수
이경우
정희원
Original Assignee
삼성전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020150021856A external-priority patent/KR102363633B1/ko
Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to US15/120,693 priority Critical patent/US10164479B2/en
Publication of WO2015126103A1 publication Critical patent/WO2015126103A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves

Definitions

  • the present invention relates to a control method of a wireless power transmitter and a wireless power transmitter, and more particularly, to a control method of a wireless power transmitter and a wireless power transmitter capable of performing communication in a predetermined manner.
  • Mobile terminals such as mobile phones or PDAs (Personal Digital Assistants) are driven by rechargeable batteries due to their characteristics, and in order to charge such batteries, electric energy is supplied to the batteries of the mobile terminals using a separate charging device.
  • the charging device and the battery are configured to have separate contact terminals on the outside, thereby contacting each other, thereby electrically connecting the charging device and the battery.
  • the wireless charging technology uses wireless power transmission and reception.
  • a mobile phone can be charged automatically by simply placing a mobile phone on a charging pad without connecting a separate charging connector.
  • a cordless electric toothbrush or a cordless electric shaver Generally known to the public as a cordless electric toothbrush or a cordless electric shaver.
  • This wireless charging technology can increase the waterproof function by charging the electronics wirelessly, and there is an advantage that can increase the portability of electronic devices because no wired charger is required, and related technologies are expected to develop significantly in the coming electric vehicle era. .
  • the wireless charging technology includes an electromagnetic induction method using a coil, a resonance method using a resonance, and a radio wave radiation (RF / Micro Wave Radiation) method that converts electrical energy into microwaves and transmits them.
  • RF / Micro Wave Radiation radio wave radiation
  • the method of transmitting power by electromagnetic induction is a method of transmitting power between a primary coil and a secondary coil.
  • an induced current is generated.
  • a magnetic field is generated at the transmitter and a current is induced by the change of the magnetic field at the receiver to generate energy.
  • This phenomenon is called a magnetic induction phenomenon and the power transmission method using the same has excellent energy transmission efficiency.
  • MIT's Soljacic professor, Coupled Mode Theory announced a system that uses the resonant power transfer principle to transfer electricity wirelessly, even a few meters away from the charger.
  • the MIT team's wireless charging system uses a physics concept that sounds like a resonance when the tuning fork sounds next to it. Instead of resonating the sound, the team resonated electromagnetic waves containing electrical energy. Resonant electrical energy is transmitted directly only when there is a device with a resonant frequency, and the unused part is absorbed into the electromagnetic field instead of spreading into the air, so unlike other electromagnetic waves, it is expected that it will not affect the surrounding machinery or the body. .
  • the wireless power transmitter and the wireless power receiver may communicate with each other based on a predetermined method, for example, a Zig-bee method or a Bluetooth low energy method.
  • a predetermined method for example, a Zig-bee method or a Bluetooth low energy method.
  • the out-band method such as the Zig-bee method or the Bluetooth low energy method
  • the wireless power transmitter and the wireless power receiver can perform communication. That is, even at a relatively long distance, at which the wireless power transmitter cannot transmit wireless power, the wireless power transmitter can communicate with the wireless power receiver.
  • Conventional wireless power transmitters include resonators included in certain classes.
  • the class may be a division criterion regarding the amount of power transmitted by the wireless power transmitter, and the wireless power transmitter may include a resonator included in one class.
  • a resonator included in a relatively large class transmits relatively large wireless power.
  • the wireless power transmitter transmits relatively large wireless power, thus causing a problem in that power is wasted.
  • the present invention has been made to solve the above-described or other problems, and can provide a wireless power transmitter and a control method including a plurality of power transmitters.
  • a method of controlling a wireless power transmitter for transmitting wireless power to at least one wireless power receiver may include receiving wireless power receiver related information from each of the at least one wireless power receiver; Based on the wireless power receiver related information, the method may include controlling each of the plurality of power transmitters included in the wireless power transmitter.
  • a wireless power transmitter for transmitting wireless power to at least one wireless power receiver may include a plurality of power transmitters; A communication unit configured to receive wireless power receiver related information from each of the at least one wireless power receiver; And a controller configured to control each of the plurality of power transmitters based on the wireless power receiver related information.
  • a wireless power transmitter including a plurality of power transmitters may be provided. Accordingly, the power transmitter of the low power class may be implemented in a form of simply being attached to the wireless power transmitter, thereby making it simple to manufacture.
  • various types of wireless power receivers can perform charging with good efficiency.
  • an effect of reducing wasted power may be created.
  • FIG. 1 is a conceptual diagram illustrating an overall operation of a wireless charging system.
  • FIG. 2 illustrates a wireless power transmitter and a wireless power receiver according to an embodiment of the present invention.
  • FIG. 3 is a detailed block diagram of a wireless power transmitter and a wireless power receiver according to an embodiment of the present invention.
  • FIG. 4 is a flowchart illustrating an operation of a wireless power transmitter and a wireless power receiver according to an embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating an operation of a wireless power transmitter and a wireless power receiver according to another embodiment of the present invention.
  • FIG. 6 is a graph of the time axis of the amount of power applied by the wireless power transmitter.
  • FIG. 7 is a flowchart illustrating a control method of a wireless power transmitter according to an embodiment of the present invention.
  • FIG. 8 is a graph of a time axis of power applied by a wireless power transmitter according to the embodiment of FIG. 7.
  • FIG. 9 is a flowchart illustrating a control method of a wireless power transmitter according to an embodiment of the present invention.
  • FIG. 10 is a graph of a time axis of a power amount applied by the wireless power transmitter according to the embodiment of FIG. 9.
  • FIG. 11 is a block diagram of a wireless power transmitter and a wireless power receiver in SA mode according to an embodiment of the present invention.
  • FIG. 12 is a block diagram of a wireless power transmitter and a wireless power receiver according to various embodiments of the present disclosure.
  • FIG. 13 is a conceptual diagram illustrating a connection between power transmission units according to various embodiments of the present disclosure.
  • FIG. 14 is a conceptual diagram illustrating a wireless power transmitter and a wireless power receiver according to various embodiments of the present disclosure.
  • 15 is a flowchart illustrating a control method of a wireless power transmitter according to various embodiments of the present disclosure.
  • 16A through 16C illustrate block diagrams of a wireless power transmission / reception system according to various embodiments of the present disclosure.
  • 17 is a circuit diagram illustrating a wireless power transmission and reception system according to various embodiments of the present disclosure.
  • FIGS. 1 to 11 a concept of a wireless charging system that can be applied to an embodiment of the present invention will be described with reference to FIGS. 1 to 11, and next, a wireless power transmitter according to various embodiments of the present disclosure will be described with reference to FIGS. 12 to 17. It will be described in detail.
  • the wireless charging system includes a wireless power transmitter 100 and at least one wireless power receiver 110-1, 110-2, 110-n.
  • the wireless power transmitter 100 may wirelessly transmit power 1-1, 1-2, 1-n to at least one wireless power receiver 110-1, 110-2, 110-n. More specifically, the wireless power transmitter 100 may wirelessly transmit power 1-1, 1-2, 1-n to only an authenticated wireless power receiver that has performed a predetermined authentication procedure.
  • the wireless power transmitter 100 may form an electrical connection with the wireless power receivers 110-1, 110-2, and 110-n.
  • the wireless power transmitter 100 may transmit wireless power in the form of electromagnetic waves to the wireless power receivers 110-1, 110-2, and 110-n.
  • the wireless power transmitter 100 may perform bidirectional communication with the wireless power receivers 110-1, 110-2, and 110-n.
  • the wireless power transmitter 100 and the wireless power receivers 110-1, 110-2, and 110-n may process or transmit and receive packets 2-1, 2-2, and 2-n composed of predetermined frames.
  • the above-described frame will be described later in more detail.
  • the wireless power receiver may be implemented as a mobile communication terminal, a PDA, a PMP, a smart phone, or the like.
  • the wireless power transmitter 100 may wirelessly provide power to the plurality of wireless power receivers 110-1, 110-2, and 110-n.
  • the wireless power transmitter 100 may transmit power to the plurality of wireless power receivers 110-1, 110-2, and 110-n through a resonance method.
  • a distance between the wireless power transmitter 100 and the plurality of wireless power receivers 110-1, 110-2, and 1110-n may be 30 m or less.
  • a distance between the wireless power transmitter 100 and the plurality of wireless power receivers 110-1, 110-2, and 110-n may be preferably 10 cm or less.
  • the wireless power receivers 110-1, 110-2, and 110-n may receive wireless power from the wireless power transmitter 100 to charge the battery included therein.
  • the wireless power receivers 110-1, 110-2, and 110-n transmit a signal for requesting wireless power transmission, information necessary for wireless power reception, wireless power receiver status information, or wireless power transmitter 100 control information. 100). Information on the above-described transmission signal will be described later in more detail.
  • the wireless power receivers 110-1, 110-2, and 110-n may transmit messages indicating respective charging states to the wireless power transmitter 100.
  • the wireless power transmitter 100 may include display means such as a display, and the wireless power receiver 110-1, 110-2, 110-n may be based on a message received from each of the wireless power receivers 110-1, 110-2, 110-n. Each state can be displayed. In addition, the wireless power transmitter 100 may also display the estimated time until each wireless power receiver 110-1, 110-2, 110-n is fully charged.
  • the wireless power transmitter 100 may transmit a control signal for disabling the wireless charging function to each of the wireless power receivers 110-1, 110-2, and 110-n.
  • the wireless power receiver that receives the disable control signal of the wireless charging function from the wireless power transmitter 100 may disable the wireless charging function.
  • FIG. 2 illustrates a wireless power transmitter and a wireless power receiver according to an embodiment of the present invention.
  • the wireless power transmitter 200 may include at least one of a power transmitter 211, a controller 212, a communication unit 213, a display unit 214, or a storage unit 215.
  • the power transmitter 211 may provide power required by the wireless power transmitter 200, and may wirelessly provide power to the wireless power receiver 250.
  • the power transmitter 211 may supply power in the form of an AC waveform, and may convert the power of the DC waveform into an AC waveform by using an inverter to supply power of the AC waveform.
  • the power transmitter 211 may be implemented in the form of a built-in battery, or may be implemented in the form of a power receiving interface to receive power from the outside and supply it to other components. It will be readily understood by those skilled in the art that the power transmitter 211 is not limited so long as it is a means capable of providing power of an AC waveform.
  • the controller 212 may control overall operations of the wireless power transmitter 200.
  • the controller 212 may control the overall operation of the wireless power transmitter 200 by using an algorithm, a program, or an application required for control read from the storage 215.
  • the controller 212 may be implemented in the form of a CPU, a microprocessor, or a minicomputer.
  • the communication unit 213 may communicate with the wireless power receiver 250 in a predetermined manner.
  • the communication unit 213 may receive power information from the wireless power receiver 250.
  • the power information may include at least one of the capacity of the wireless power receiver 250, the battery remaining amount, the number of charges, the usage amount, the battery capacity, and the battery ratio.
  • the communication unit 213 may transmit a charging function control signal for controlling the charging function of the wireless power receiver 250.
  • the charging function control signal may be a control signal for controlling the power receiver 251 of the specific wireless power receiver 250 to enable or disable the charging function.
  • the power information may include information such as drawing of a wired charging terminal, switching from a stand alone (SA) mode to a non stand alone (NAS) mode, and clearing an error situation.
  • the charging function control signal may be information related to the determination of the cross connection according to various embodiments of the present disclosure. For example, it may include identification information, configuration information, and the like for cross-connection determination, and may include pattern or time information related to a load change of the wireless power receiver 250 for cross-connection determination.
  • the communication unit 213 may receive signals from other wireless power transmitters (not shown) as well as the wireless power receiver 250.
  • the controller 212 may display the state of the wireless power receiver 250 on the display unit 214 based on the message received from the wireless power receiver 250 through the communication unit 213. In addition, the controller 212 may display, on the display unit 214, an estimated time until the charging of the wireless power receiver 250 is completed.
  • the wireless power receiver 250 may include at least one of a power receiver 251, a controller 252, a communication unit 253, a display unit 258, or a storage unit 259. have.
  • the power receiver 251 may wirelessly receive power transmitted from the wireless power transmitter 200.
  • the power receiver 251 may receive power in the form of an AC waveform.
  • the controller 252 may control the overall operation of the wireless power receiver 250.
  • the controller 252 may control the overall operation of the wireless power transmitter 250 by using an algorithm, a program, or an application required for the control read from the storage 259.
  • the controller 252 may be implemented in the form of a CPU, a microprocessor, or a minicomputer.
  • the communication unit 253 may communicate with the wireless power transmitter 200 in a predetermined manner.
  • the communication unit 253 may transmit power information to the wireless power transmitter 200.
  • the power information may include at least one of the capacity of the wireless power receiver 250, the battery remaining amount, the number of charges, the usage amount, the battery capacity, and the battery ratio.
  • the communication unit 253 may transmit a charging function control signal for controlling the charging function of the wireless power receiver 250.
  • the charging function control signal may be a control signal for controlling the power receiver 251 of the specific wireless power receiver 250 to enable or disable the charging function.
  • the power information may include information such as drawing of a wired charging terminal, switching from a stand alone (SA) mode to a non stand alone (NAS) mode, and clearing an error situation.
  • the charging function control signal may be information related to the determination of the cross connection according to various embodiments of the present disclosure. For example, it may include identification information, configuration information, and the like for cross-connection determination, and may include pattern or time information related to a load change of the wireless power receiver 250 for cross-connection determination.
  • the controller 252 may control to display the state of the wireless power receiver 250 on the display unit 258. In addition, the controller 252 may display on the display unit 258 the time expected for the wireless power receiver 250 to complete charging.
  • FIG. 3 is a detailed block diagram of a wireless power transmitter and a wireless power receiver according to an embodiment of the present invention.
  • the wireless power transmitter 200 includes a transmission side resonator (Tx resonator) 211a, a controller 212 (eg, MCU), and a communication unit 213 (eg, out-of-band signaling).
  • a driving unit (Power Supply) 217, an amplifier (Power Amp) 218, a matching circuit (Matching Circuit) 216, or a sensing unit (sensing unit) 219 may include at least one.
  • the wireless power receiver 250 includes a reception side resonator 251a, a controller 252, a communication unit 253, a rectifier 254, a DC / DC converter 255, a switch unit, and a switch unit. (256) or at least one of a load unit (Client Device Load) (257).
  • the driver 217 may output DC power having a predetermined voltage value.
  • the voltage value of the DC power output from the driver 217 may be controlled by the controller 212.
  • the DC current output from the driver 217 may be output to the amplifier 218.
  • the amplifier 218 may amplify the DC current with a predetermined gain.
  • the DC power may be converted into AC based on a signal input from the controller 212. Accordingly, the amplifier 218 may output AC power.
  • the matching unit 216 may perform impedance matching. For example, the impedance viewed from the matching unit 216 may be adjusted to control the output power to be high efficiency or high output.
  • the sensor unit 219 may sense a load change by the wireless power receiver 250 through the Tx resonator 211a or the amplifier 218. The sensing result of the sensor unit 219 may be provided to the controller 212.
  • the matching unit 216 may adjust the impedance based on the control of the controller 212.
  • the matching unit 216 may include at least one of a coil and a capacitor.
  • the controller 212 may control a connection state with at least one of the coil and the capacitor, thereby performing impedance matching.
  • the Tx resonator 211a may transmit the input AC power to the Rx resonator 251a.
  • the Tx resonator 211a and the Rx resonator 251a may be implemented as resonant circuits having the same resonant frequency.
  • the resonant frequency may be determined to be 6.78 MHz.
  • the inverter unit (not shown) may invert the DC power from the driver 217 to AC power and output the AC power to the Tx resonator 211a.
  • the communication unit 213 may communicate with the communication unit 253 on the wireless power receiver 250 side, for example, may perform communication (WiFi, ZigBee, BT / BLE) at the bidirectional 2.4GHz frequency. .
  • the Rx resonator 251a may receive power for charging.
  • the rectifier 254 may rectify the wireless power received by the Rx resonator 251a in a direct current form, for example, may be implemented in the form of a bridge diode.
  • the DC / DC converter 255 may convert the rectified power into a predetermined gain.
  • the DC / DC converter 255 may convert the rectified power such that the voltage at the output terminal is 5V. Meanwhile, a minimum value and a maximum value of a voltage that may be applied to the front end of the DC / DC converter 255 may be preset.
  • the switch unit 256 may connect the DC / DC converter 255 and the load unit 257.
  • the switch unit 256 may maintain an on / off state under the control of the controller 252. This switch unit 256 may be omitted.
  • the load unit 257 may store the converted power input from the DC / DC converter 255 when the switch unit 256 is in an on state.
  • the wireless power transmitter 400 may apply power (S401). If power is applied, the wireless power transmitter 400 may configure an environment (S402).
  • the wireless power transmitter 400 may enter a power save mode (S403).
  • the wireless power transmitter 400 may apply each of the heterogeneous detection power beacons at respective cycles, which will be described in more detail with reference to FIG. 6.
  • the wireless power transmitter 400 may apply detection power beacons S404 and S405 (eg, short beacons or long beacons).
  • the power values of the detection power beacons S404 and S405 may be different.
  • Some or all of the detection power beacons S404 and S405 may have a power amount capable of driving the communication unit of the wireless power receiver 450.
  • the wireless power receiver 450 may drive the communication unit by some or all of the detection power beacons S404 and S405 to communicate with the wireless power transmitter 400.
  • the state may be referred to as a null state S406.
  • the wireless power transmitter 400 may detect a load change due to the arrangement of the wireless power receiver 450.
  • the wireless power transmitter 400 may enter a low power mode S408.
  • the low power mode will be described in more detail with reference to FIG. 6.
  • the wireless power receiver 450 may drive the communication unit based on the power received from the wireless power transmitter 400 (S409).
  • the wireless power receiver 450 may transmit a PTU searching signal to the wireless power transmitter 400 (S410).
  • the wireless power receiver 450 may transmit a wireless power transmitter search signal as a BLE-based advertising signal (AD).
  • the wireless power receiver 450 may periodically transmit a wireless power transmitter search signal, and may receive a response signal from the wireless power transmitter 400 or until a predetermined time arrives.
  • the wireless power transmitter 400 may transmit a response signal (PRU response signal) (S411).
  • the response signal may form a connection between the wireless power transmitter 400 and the wireless power receiver 400.
  • the wireless power receiver 450 may transmit a PRU static signal (S412).
  • the PRU static signal may be a signal indicating the state of the wireless power receiver 450 and may request to join the wireless power network controlled by the wireless power transmitter 400.
  • the wireless power transmitter 400 may transmit a PTU static signal (S413).
  • the PTU static signal transmitted by the wireless power transmitter 400 may be a signal indicating the capability of the wireless power transmitter 400.
  • the wireless power receiver 450 may periodically transmit the PRU dynamic signal (S414 and S415).
  • the PRU dynamic signal may include at least one parameter information measured by the wireless power receiver 450.
  • the PRU dynamic signal may include voltage information behind the rectifier of the wireless power receiver 450.
  • the state of the wireless power receiver 450 may be referred to as a boot state S407.
  • the wireless power transmitter 400 enters a power transmission mode (S416), and the wireless power transmitter 400 may transmit a PRU control signal, which is a command signal for allowing the wireless power receiver 450 to perform charging. There is (S417). In the power transmission mode, the wireless power transmitter 400 may transmit charging power.
  • the PRU control signal transmitted by the wireless power transmitter 400 may include information for enabling / disabling the charging of the wireless power receiver 450 and permission information.
  • the PRU control signal may be sent whenever the state of charge changes.
  • the PRU control signal may be transmitted every 250 ms, for example, or may be transmitted when there is a parameter change.
  • the PRU control signal may be set to be transmitted within a preset threshold time, for example 1 second, even if the parameter does not change.
  • the wireless power receiver 400 may change a setting according to a PRU control signal and transmit a wireless power receiver dynamic (PRU dynamic) signal for reporting a status of the wireless power receiver 450 (S418 and S419).
  • the PRU dynamic signal transmitted by the wireless power receiver 450 may include at least one of voltage, current, wireless power receiver state, and temperature information.
  • the state of the wireless power receiver 450 may be referred to as an on state.
  • the PRU dynamic signal may have a data structure as shown in Table 1 below.
  • the PRU dynamic signal may consist of at least one field.
  • Each field includes optional field information, voltage information at the rear end of the rectifier of the wireless power receiver, current information at the rear end of the rectifier of the wireless power receiver, voltage information at the rear end of the DC / DC converter of the wireless power receiver, DC / DC of the wireless power receiver.
  • Current information temperature information at the rear end of the converter, minimum voltage value information (VRECT_MIN_DYN) at the rear end of the rectifier of the wireless power receiver, optimal voltage value information (VRECT_SET_DYN) at the rear end of the rectifier of the wireless power receiver, and the rear end of the rectifier of the wireless power receiver.
  • the maximum voltage value VRECT_HIGH_DYN and the warning information PRU alert may be set.
  • the PRU dynamic signal may include at least one of the above fields.
  • At least one voltage set value determined according to a charging situation eg, minimum voltage value information VRECT_MIN_DYN of the rear end of the rectifier of the wireless power receiver, and optimal voltage value information VRECT_SET_DYN of the rear end of the rectifier of the wireless power receiver.
  • the maximum voltage value information (VRECT_HIGH_DYN, etc.) of the rear end of the rectifier of the wireless power receiver may be included in the corresponding field of the PRU dynamic signal and transmitted.
  • the wireless power transmitter receiving the PRU dynamic signal may adjust the wireless charging voltage to be transmitted to each wireless power receiver with reference to the voltage setting values included in the PRU dynamic signal.
  • the alert information PRU Alert may be formed in a data structure as shown in Table 2 below.
  • the PRU Alert includes bits for a restart request, bits for a transition, and wire adapter detection (TA) detect. It may include a bit for.
  • the TA detect indicates a bit indicating that the terminal for wired charging is connected in the wireless power transmitter in which the wireless power receiver provides wireless charging.
  • the bit for switching is a bit that informs the wireless power transmitter that the wireless power receiver is reset before the communication IC of the wireless power receiver switches from the stand alone mode to the non stand alone mode. Indicates.
  • a restart request causes the wireless power transmitter to resume charging to the wireless power receiver when an overcurrent or over temperature condition occurs that causes the wireless power transmitter to reduce its transmit power and stop charging. Indicates a bit indicating that it is ready.
  • alert information may be formed of a data structure as shown in Table 3 below.
  • the warning information is over voltage, over current, over temperature, PRU self protection, charge complete, wired charging It may include a wired charger detect, a mode transition, and the like.
  • a wired charger detect when '1' is set in the over voltage field, this may indicate that the voltage Vrect at the wireless power receiver has exceeded the overvoltage limit.
  • over current and over temperature may be set in the same manner as in overvoltage.
  • PRU Self Protection means protecting the wireless power receiver by reducing the power directly loaded, in which case the wireless power transmitter does not need to change the state of charge.
  • Bits for mode transition may be set to a value for notifying the wireless power transmitter of a period during which the mode transition procedure is performed. Bits indicating the mode switching period may be represented as shown in Table 4 below.
  • '00' indicates that there is no mode change
  • '01' indicates that the time required to complete the mode change is 2 seconds at maximum
  • '10' indicates that the mode change is completed.
  • '11' may indicate that the time required to complete the mode change is up to 6 seconds.
  • the mode switch bit may be set to '10'.
  • the wireless power receiver may change the input impedance setting to match the 1.1 W power draw to limit any impedance change during the mode switching procedure. Accordingly, the wireless power transmitter adjusts the power (ITX_COIL) for the wireless power receiver in accordance with this setting, thereby maintaining the power (ITX_COIL) for the wireless power receiver during the mode switching period.
  • the wireless power transmitter may maintain the power ITX_COIL for the wireless power receiver during the mode switch time, for example, 3 seconds. That is, even if no response is received from the wireless power receiver for 3 seconds, the connection can be maintained. However, after the mode switching time has elapsed, the wireless power receiver may be regarded as a "rouge object" to terminate power transmission.
  • the wireless power receiver 450 may detect an error occurrence.
  • the wireless power receiver 450 may transmit a warning signal to the wireless power transmitter 400 (S420).
  • the alert signal may be transmitted as a PRU dynamic signal or as an alert signal.
  • the wireless power receiver 450 may transmit to the wireless power transmitter 400 by reflecting an error situation in the PRU alert field of Table 1 above.
  • the wireless power receiver 450 may transmit a single warning signal indicating the error situation to the wireless power transmitter 400.
  • the wireless power transmitter 400 may enter a latch fault mode (S422).
  • the wireless power receiver 450 may enter a null state (S423).
  • FIG. 5 is a flowchart illustrating an operation of a wireless power transmitter and a wireless power receiver according to another embodiment of the present invention. The control method of FIG. 5 will be described in more detail with reference to FIG. 6.
  • 6 is a graph of a time axis of the amount of power applied by the wireless power transmitter according to the embodiment of FIG. 5.
  • the wireless power transmitter may start driving (S501).
  • the wireless power transmitter may reset the initial setting (S503).
  • the wireless power transmitter may enter a power saving mode (S505).
  • the power saving mode may be a section in which the wireless power transmitter applies heterogeneous powers of different power amounts to the power transmitter.
  • the wireless power transmitter may be a section for applying the second detection power 601, 602 and the third detection power 611, 612, 613, 614, 615 in FIG. 6 to the power transmitter.
  • the wireless power transmitter may periodically apply the second detection power 601, 602 at a second cycle, and apply the second detection power 601, 602 for a second period.
  • the wireless power transmitter may periodically apply the third detection power 611, 612, 613, 614, 615 in the third period, and in the case of applying the third detection power 611, 612, 613, 614, 615. May be applied for a third period of time.
  • each power value of the third detection power 611, 612, 613, 614, 615 is shown as being different, but each power value of the third detection power 611, 612, 613, 614, 615 is different. May be different or the same.
  • the wireless power transmitter may output the third detection power 612 having the same amount of power after outputting the third detection power 611.
  • the amount of power of the third detection power has the amount of power capable of detecting the smallest wireless power receiver, for example, the category 1 wireless power receiver. Can be.
  • the wireless power transmitter may output the third detection power 612 having a different amount of power after outputting the third detection power 611.
  • each of the power amounts of the third detection power may be an amount of power capable of detecting the wireless power receivers of the categories 1 to 5.
  • the third detection power 611 may have an amount of power capable of detecting a category 5 wireless power receiver
  • the third detection power 612 may determine an amount of power capable of detecting a category 3 wireless power receiver.
  • the third detection power 613 may have a power amount capable of detecting a category 1 wireless power receiver.
  • the second detection powers 601 and 602 may be power capable of driving the wireless power receiver. More specifically, the second detection powers 601 and 602 may have a power amount capable of driving the control unit and / or the communication unit of the wireless power receiver.
  • the wireless power transmitter may apply the second detection power 601, 602 and the third detection power 611, 612, 613, 614, 615 to the power receiver in a second period and a third period, respectively.
  • the impedance seen at one point of the wireless power transmitter may change.
  • the wireless power transmitter may detect a change in impedance while the second detection power 601, 602 and the third detection power 611, 612, 613, 614, 615 are applied.
  • the wireless power transmitter may detect that the impedance is changed while applying the third detection power 615. Accordingly, the wireless power transmitter may detect an object (S507). If no object is detected (S507-N), the wireless power transmitter may maintain a power saving mode in which heterogeneous power is periodically applied (S505).
  • the wireless power transmitter may enter the low power mode.
  • the low power mode is a mode in which the wireless power transmitter applies driving power having an amount of power capable of driving the controller and the communication unit of the wireless power receiver.
  • the wireless power transmitter may apply driving power 620 to the power transmitter.
  • the wireless power receiver may receive the driving power 620 to drive the control unit and / or the communication unit.
  • the wireless power receiver may communicate with the wireless power transmitter based on a predetermined scheme based on the driving power 620.
  • the wireless power receiver may transmit and receive data required for authentication, and may join the wireless power network managed by the wireless power transmitter based on this.
  • the wireless power transmitter may determine whether the placed object is a foreign object (S511). For example, if the wireless power transmitter does not receive a response from the object for a predetermined time, the wireless power transmitter may determine the object as a foreign object.
  • the wireless power transmitter may enter a latch fault mode (S513). On the other hand, if it is determined that the foreign matter (S511-N), it can proceed to the joining step (S519). For example, the wireless power transmitter may periodically apply the first power 631 to 634 in FIG. 6 at a first cycle. The wireless power transmitter may detect a change in impedance while applying the first power. For example, when the foreign matter is recovered (S515-Y), the impedance change may be detected, and the wireless power transmitter may determine that the foreign matter is recovered.
  • the wireless power transmitter when the foreign matter is not recovered (S515-N), the wireless power transmitter cannot detect the impedance change, and the wireless power transmitter may determine that the foreign matter is not recovered. If the foreign matter is not recovered, the wireless power transmitter may output at least one of a lamp and a warning sound to notify the user that the current wireless power transmitter is in an error state. Accordingly, the wireless power transmitter may include an output unit for outputting at least one of a lamp and a warning sound.
  • the wireless power transmitter may maintain the latch failure mode (S513). On the other hand, if it is determined that the foreign matter is recovered (S515-Y), the wireless power transmitter may re-enter the power saving mode (S517). For example, the wireless power transmitter may apply the second power 651 and 652 and the third power 661 to 665 of FIG. 6.
  • the wireless power transmitter may enter the latch failure mode when a foreign material other than the wireless power receiver is disposed.
  • the wireless power transmitter may determine whether to collect the foreign matter based on the impedance change based on the power applied in the latch failure mode. That is, the latch failure mode entry condition in the embodiments of FIGS. 5 and 6 may be a batch of foreign matter.
  • the wireless power transmitter may have various latch failure mode entry conditions in addition to the placement of the foreign matter.
  • the wireless power transmitter may be cross-connected with the deployed wireless power receiver and may enter the latch failure mode even in this case.
  • the wireless power transmitter is required to return to the initial state when the cross connection occurs, and the number of times of the wireless power receiver is required.
  • the wireless power transmitter may set a cross connection in which a wireless power receiver disposed on another wireless power transmitter joins the wireless power network as a latch failure mode entry condition. An operation of the wireless power transmitter at the time of the error including the cross connection will be described with reference to FIG. 7.
  • FIG. 7 is a flowchart illustrating a control method of a wireless power transmitter according to an embodiment of the present invention. The control method of FIG. 7 will be described in more detail with reference to FIG. 8.
  • FIG. 8 is a graph of a time axis of power applied by a wireless power transmitter according to the embodiment of FIG. 7.
  • the wireless power transmitter may start driving (S701). In addition, the wireless power transmitter may reset the initial setting (S703).
  • the wireless power transmitter may enter a power saving mode (S705).
  • the power saving mode may be a section in which the wireless power transmitter applies heterogeneous powers of different power amounts to the power transmitter.
  • the wireless power transmitter may be a section for applying the second detection power 801, 802 and the third detection power 811, 812, 813, 814, 815 in FIG. 8 to the power transmitter.
  • the wireless power transmitter may periodically apply the second detection powers 801 and 802 at a second cycle, and apply the second detection power 801 and 802 during the second period.
  • the wireless power transmitter may periodically apply the third detection power 811, 812, 813, 814, 815 at a third period, and when the third detection power 811, 812, 813, 814, 815 is applied May be applied for a third period of time.
  • the respective power values of the third detection powers 811, 812, 813, 814, 815 are shown as different, but the respective power values of the third detection powers 811, 812, 813, 814, 815 are shown. May be different or the same.
  • the second detection powers 801 and 802 may be power capable of driving the wireless power receiver. More specifically, the second detection powers 801 and 802 may have a power amount capable of driving the control unit and / or the communication unit of the wireless power receiver.
  • the wireless power transmitter may apply the second detection power 801, 802 and the third detection power 811, 812, 813, 814, 815 to the power receiver in a second period and a third period, respectively.
  • the impedance seen at one point of the wireless power transmitter may change.
  • the wireless power transmitter may detect a change in impedance while the second detection powers 801 and 802 and the third detection powers 811, 812, 813, 814, and 815 are applied.
  • the wireless power transmitter may detect that the impedance is changed while applying the third detection power 815. Accordingly, the wireless power transmitter may detect an object (S707). If no object is detected (S707-N), the wireless power transmitter may maintain a power saving mode in which heterogeneous power is periodically applied (S705).
  • the wireless power transmitter may enter the low power mode (S709).
  • the low power mode is a mode in which the wireless power transmitter applies driving power having a power amount capable of driving the control unit and / or the communication unit of the wireless power receiver.
  • the wireless power transmitter may apply the driving power 820 to the power transmitter.
  • the wireless power receiver may receive the driving power 820 to drive the control unit and / or the communication unit.
  • the wireless power receiver may communicate with the wireless power transmitter based on a predetermined scheme based on the driving power 820. For example, the wireless power receiver may transmit and receive data required for authentication, and may join the wireless power network managed by the wireless power transmitter based on this.
  • the wireless power transmitter may enter a power transmission mode for transmitting charging power (S711).
  • the wireless power transmitter may apply charging power 821 as shown in FIG. 8, and the charging power may be transmitted to the wireless power receiver.
  • the wireless power transmitter may determine whether an error occurs in the power transmission mode.
  • the error may be a foreign material disposed on the wireless power transmitter, cross connection, over voltage, over current, over temperature, and the like.
  • the wireless power transmitter may include a sensing unit capable of measuring over voltage, over current, over temperature, and the like.
  • the wireless power transmitter may measure the voltage or current of the reference point, and determine that the overvoltage or overcurrent condition is satisfied that the measured voltage or current exceeds the threshold.
  • the wireless power transmitter may include a temperature sensing means, and the temperature sensing means may measure a temperature of a reference point of the wireless power transmitter. If the temperature of the reference point exceeds the threshold, the wireless power transmitter may determine that the overtemperature condition is satisfied.
  • the wireless power transmitter lowers the wireless charging power by a predetermined value to prevent overvoltage, overcurrent, overtemperature. do.
  • the lowered voltage value of the wireless charging power becomes lower than the set minimum value (for example, the minimum voltage value VRECT_MIN_DYN of the rear end of the wireless power receiver rectifier), the wireless charging is stopped, and thus the voltage setting value is readjusted according to an embodiment of the present invention. can do.
  • the wireless power transmitter may maintain the power transmission mode (S711). On the other hand, if an error occurs (S713-Y), the wireless power transmitter may enter the latch failure mode (S715). For example, the wireless power transmitter may apply the first powers 831 to 835 as shown in FIG. 8. In addition, the wireless power transmitter may output an error occurrence indication including at least one of a lamp and a warning sound during the latch failure mode. If it is determined that the foreign matter or the wireless power receiver is not recovered (S717-N), the wireless power transmitter may maintain the latch failure mode (S715).
  • the wireless power transmitter may re-enter the power saving mode (S719).
  • the wireless power transmitter may apply the second powers 851 and 852 and the third powers 861 to 865 of FIG. 8.
  • FIG. 10 is a graph of a time axis of a power amount applied by the wireless power transmitter according to the embodiment of FIG. 9.
  • the wireless power transmitter may transmit charging power to the first wireless power receiver (S901).
  • the wireless power transmitter may additionally subscribe the second wireless power receiver to the wireless power network (S903).
  • the wireless power transmitter may transmit charging power to the second wireless power receiver (S905). More specifically, the wireless power transmitter may apply the sum of charging powers required by the first wireless power receiver and the second wireless power receiver to the power receiver.
  • the wireless power transmitter may maintain a power saving mode in which the second detection powers 1001 and 1002 and the third detection powers 1011 to 1015 are applied. Thereafter, the wireless power transmitter detects the first wireless power receiver and may enter a low power mode that maintains the detection power 1020. Thereafter, the wireless power transmitter may enter a power transmission mode for applying the first charging power 1030. The wireless power transmitter may detect the second wireless power receiver and join the second wireless power receiver to the wireless power network. In addition, the wireless power transmitter may apply the second charging power 1040 having the total amount of power required by the first wireless power receiver and the second wireless power receiver.
  • the wireless power transmitter may detect an error occurrence while transmitting charging power to both the first and second wireless power receivers (S905).
  • the error may be a foreign material arrangement, cross connection, over voltage, over current, over temperature, and the like, as described above. If no error occurs (S907-N), the wireless power transmitter may maintain application of the second charging power 1040.
  • the wireless power transmitter may enter the latch failure mode (S909).
  • the wireless power transmitter may apply the first powers 1051 to 1055 of FIG. 10 at a first period.
  • the wireless power transmitter may determine whether both the first wireless power receiver and the second wireless power receiver are recovered (S911).
  • the wireless power transmitter may detect a change in impedance during the application of the first power 1051 to 1055.
  • the wireless power transmitter may determine whether both the first wireless power receiver and the second wireless power receiver are recovered based on whether the impedance returns to the initial value.
  • the wireless power transmitter may enter a power saving mode (S913).
  • the wireless power transmitter may apply second detection power 1061 and 1062 and third detection power 1071 to 1075 in a second period and a third period, respectively, as shown in FIG. 10.
  • the wireless power transmitter may easily determine whether the wireless power receiver or the foreign matter is recovered when an error occurs.
  • FIG. 11 is a block diagram of a wireless power transmitter and a wireless power receiver in a stand alone (SA) mode according to an embodiment of the present invention.
  • the wireless power transmitter 1100 may include a communication unit 1110, a power amplifier (PA) 1120, and a resonator 1130.
  • the wireless power receiver 1150 includes a WPT communication IC 1151, an application processor (AP) 1152, a power management integrated circuit (PMIC) 1153, and a wireless power integrated circuit (WIC).
  • WPIC Wireless Power Integrated Circuit
  • IFPM Interface Power Management IC
  • TA Travel Adapter
  • Battery Battery
  • the communication unit 1100 may be implemented as a Wi-Fi / Bluetooth (Combo) Combo IC, and may communicate with the communication unit 1151 based on a predetermined method, for example, a BLE method.
  • the communication unit 1151 of the wireless power receiver 1150 may transmit a PRU dynamic signal having a data structure of Table 1 to the communication unit 1110 of the wireless power transmitter 1100.
  • the PRU dynamic signal may include at least one of voltage information, current information, temperature information, and warning information of the wireless power receiver 1150.
  • the output power value from the power amplifier 1120 may be adjusted. For example, when overvoltage, overcurrent, and overtemperature are applied to the wireless power receiver 1150, the power value output from the power amplifier 1120 may be reduced. In addition, when the voltage or current of the wireless power receiver 1150 is less than a predetermined value, the power value output from the power amplifier 1120 may be increased.
  • Charging power from the resonator 1130 may be wirelessly transmitted to the resonator 1155.
  • the wireless power integrated circuit 1154 may rectify the charging power received from the resonator 1155 and convert the DC / DC.
  • the wireless power integrated circuit 1154 drives the communication unit 1151 or charges the battery 1159 with the converted power.
  • a wired charging terminal may be inserted into the wired charging adapter 1158.
  • the wired charging adapter 1158 may receive a wired charging terminal such as a 30-pin connector or a USB connector, and may charge the battery 1159 by receiving power supplied from an external power source.
  • the interface power management integrated circuit 1157 may process power applied from the wired charging terminal and output the processed power to the battery 1159 and the power management integrated circuit 1153.
  • the power management integrated circuit 1153 may manage power wirelessly received or wired and power applied to each of the components of the wireless power receiver 1150.
  • the application processor 1152 may control the communicator 1151 to receive power information from the power management integrated circuit 1153 and transmit a PRU dynamic signal for reporting the power information.
  • the node 1156 connected to the wireless power integrated circuit 1154 may also be connected to the wired charging adapter 1158.
  • a predetermined voltage for example, 5V
  • the wireless power integrated circuit 1154 may determine whether the wired charging adapter is inserted by monitoring a voltage applied to the node 1156.
  • the application processor 1152 has a stack of a predetermined communication scheme, for example, WiFi / BT / BLE stack. Therefore, when communicating for wireless charging, the communication unit 1151 loads the stack from the application processor 1152, and then uses the BT and BLE communication schemes based on the stack to communicate with the communication unit 1110 of the wireless power transmitter 1100. Can communicate.
  • a predetermined communication scheme for example, WiFi / BT / BLE stack.
  • the application processor 1152 when the application processor 1152 is in a power-off state and cannot acquire data for performing wireless power transfer from the application processor 1152 or while the data is being used from the memory in the application processor 1152. A state where power is lost may occur such that the application processor 1152 may not be maintained in an on state.
  • the application processor 1152 when the remaining capacity of the battery 1159 falls below the minimum power threshold, the application processor 1152 is turned off, and some components for wireless charging disposed inside the wireless power receiver, for example, the communication unit 1151, wireless power. Wireless charging may be performed using the integrated circuit 1154, the resonator 115, or the like. In this case, the dead battery state may be a state in which power cannot be supplied enough to turn on the application processor 1152.
  • the communication unit 1151 may not receive a stack of a predetermined communication scheme, for example, a WiFi / BT / BLE stack, from the application processor 1152.
  • a stack of a predetermined communication scheme for example, a WiFi / BT / BLE stack
  • some of the stacks of the predetermined communication scheme for example, the BLE stack
  • the communication unit 1151 may perform communication with the wireless power transmitter 1100 for wireless charging by using the stack of the communication method stored in the memory 1162, that is, the wireless charging protocol.
  • the communication unit 1151 may include a memory therein.
  • the BLE stack may be stored in a ROM type memory.
  • communication by the communication unit 1151 using the stack of the communication scheme stored in the memory 1162 may be referred to as a stand alone (SA) mode. Accordingly, the communication unit 1151 may manage the charging procedure based on the BLE stack.
  • SA stand alone
  • FIG. 12 is a block diagram of a wireless power transmitter and a wireless power receiver according to various embodiments of the present disclosure.
  • the wireless power transmitter 1200 may wirelessly transmit wireless power to at least one wireless power receiver 1230, 1240.
  • the wireless power transmitter 1200 may include a plurality of power transmitters 1210 and 1220. Each of the plurality of power transmitters 1210 and 1220 may have different characteristics.
  • the first power transmitter 1210 and the second power transmitter 1220 may be included in different classes.
  • the class may be related to the amount of power transmitted by the power transmitter, and may be divided into class 1 to class 5.
  • the wireless power receiver may be classified into categories according to the amount of power received or the amount of driving power. The categories may be divided into categories 1 to 4, for example.
  • the wireless power transmitter included in class 1 may transmit wireless power to one wireless power receiver included in category 1.
  • the wireless power transmitter included in class 2 may transmit wireless power to one wireless power receiver included in category 1, 2, or 3.
  • the wireless power transmitter included in class 3 may transmit wireless power to two wireless power receivers included in category 1, 2 or 3 or one wireless power receiver included in category 4.
  • the wireless power transmitter included in class 5 may transmit enough wireless power to transmit wireless power without limitation in the category of the wireless power receiver.
  • the first power transmitter 1210 may be included in the fourth class, and the second power transmitter 1220 may be included in the second class.
  • the wireless power transmitter 1200 may transmit wireless power to the first wireless power receiver 1230.
  • the wireless power transmitter 1200 may transmit wireless power to the first wireless power receiver 1230 through the first power transmitter 1210.
  • the first wireless power receiver 1230 may be included in the fourth category.
  • the second wireless power receiver 1240 may be included in the first category.
  • the wireless power transmitter 1200 may obtain information of each of the first wireless power receiver 1230 and the second wireless power receiver 1240. For example, the wireless power transmitter 1200 may receive a message including information on a category from each of the first wireless power receiver 1230 and the second wireless power receiver 1240. The wireless power transmitter 1200 may determine a power transmitter to transmit wireless power corresponding to the category of the first wireless power receiver 1230. In the above-described example, when the first wireless power receiver 1230 is included in the fourth category, the wireless power transmitter 1200 may include a first power transmitter that may provide wireless power to the wireless power receiver of the fourth category. 1210 may be determined as a power transmitter to transmit wireless power.
  • the wireless power transmitter 1200 may include a first power transmitter 1210 capable of providing wireless power to the wireless power receiver of the first category; The second power transmitter 1220 may determine the power transmitter to transmit the wireless power.
  • the wireless power transmitter 1200 may determine a power transmitter included in a lower class as a power transmitter to transmit wireless power. This is to prevent waste of power.
  • the power transmitter 1210 may minimize the wasted wireless power by selecting a power receiver having the lowest class among power receivers capable of providing power to the wireless power receiver.
  • the wireless power transmitter 120 may determine a power transmitter that has transmitted wireless power based on at least one of the location, shape or temperature of the wireless power receiver.
  • each of the first power transmitter 1210 and the second power transmitter 1220 may be a resonator.
  • the first power transmitter 1210 and the second power transmitter 1220 may share elements required for wireless power transmission such as a matching unit and an amplifier.
  • each of the first power transmitter 1210 and the second power transmitter 1220 may include a resonator, a matching unit, and an amplifier.
  • first power transmitter 1210 and the second power transmitter 1220 may communicate with each other.
  • FIG. 13 is a conceptual diagram illustrating a connection between power transmission units according to various embodiments of the present disclosure.
  • the second power transmitter 1320 and the third power transmitter 1330 may be connected to the first power transmitter 1310.
  • the first power transmitter 1310 may be a master power transmitter
  • the second power transmitter 1320 and the third power transmitter 1330 may be slave power transmitters.
  • the power transmitter 1200 may determine the first power transmitter 1310 included in the highest class as the master power transmitter.
  • the power transmitter 1200 determines the first power transmitter 1310 included in the wireless power transmitter 1200 as the master power transmitter in hardware and is detachable to the wireless power transmitter 1200.
  • the second power transmitter 1320 and the third power transmitter 1330 may be determined as slave power transmitters.
  • the second power transmitter 1320 may be wired 1340 to the first power transmitter 1310 through a port 1311.
  • the second power transmitter 1320 may include a port 1321 for the wired connection 1340.
  • the port 1311 of the first power transmitter 1310 and the port 1321 of the second power transmitter 1320 may have a structure capable of coupling with each other.
  • the port 1311 and the second power transmitter 1320 in the first power transmitter 1310 may be implemented as sockets and plugs, respectively.
  • the wireless power transmitter 1200 may provide driving power for power transmission to the second power transmitter 1320.
  • the third power transmitter 1330 may be wirelessly connected 1350 to the first power transmitter 1310.
  • the third power transmitter 1330 may be electromagnetically coupled to the first power transmitter 1310.
  • the first power transmitter 1310 may include at least one first inductor for resonance, and the third power unit 1330 may include at least one third inductor for resonance.
  • the first inductor and the third inductor may be inductively coupled to each other, and thus, the wireless power transmitter 1200 may provide driving power for power transmission to the third power transmitter 1330.
  • the master power transmitter and the slave power transmitter may be connected to each other by wire or wirelessly.
  • the power transmitters may be connected in series or may be connected in parallel.
  • FIG. 14 is a conceptual diagram illustrating a wireless power transmitter and a wireless power receiver according to various embodiments of the present disclosure.
  • the wireless power transmitter may include an amplifier 1411, a controller 1412, a first resonator 1142, and a second resonator 1142.
  • the first resonator 1142 and the second resonator 1142 may be included in different classes, respectively.
  • the first resonator 1142 may be included in a class that is relatively higher than the second resonator 1142. That is, the wireless power transmitter may include a plurality of resonators 1421 and 1422, each included in a different class.
  • the wireless power transmitter may include an amplifier 1411 for power transmission in addition to the plurality of resonators 1142 and 1422.
  • the amplifier 1411 may amplify the power obtained from the power provider (not shown) with a predetermined gain and transfer the power to the resonator.
  • the plurality of resonators 1421 and 1422 may share the amplifier 1411. That is, the first resonator 1142 may receive power from the amplifier 1411 and transmit the power to the first power receiver 1431.
  • the second resonator 1142 may receive power from the amplifier 1411 and transmit the power to the second power receiver 1432.
  • the first power receiver 1431 may receive power and transmit the power to the first load unit 1432.
  • the second power receiver 1442 may receive power and transmit the power to the second load unit 1442.
  • the controller 1412 may determine a power receiver to transmit wireless power based on information of the wireless power receiver. When the power receiver is determined, the controller 1412 may adjust power provided to the determined power receiver. In one embodiment, the controller 1412 may adjust the power output from the power provider (not shown) according to the determined class of the power receiver. Alternatively, the controller 1412 may adjust the gain of the amplifier 1411 according to an appropriate voltage of the power receiver.
  • 15 is a flowchart illustrating a control method of a wireless power transmitter according to various embodiments of the present disclosure.
  • the wireless power transmitter may form a communication connection with the wireless power receiver. Since the process of establishing a communication connection with the wireless power receiver by the wireless power receiver has been described in detail with reference to FIG. 4, the description thereof will be omitted.
  • the wireless power transmitter may receive wireless power receiver related information from the wireless power receiver.
  • the wireless power transmitter may receive wireless power receiver related information from at least one of a PTU searching signal, a PRU static signal, or a PRU dynamic signal.
  • the wireless power transmitter may include category information, voltage information, power information, current information, and form of the wireless power receiver from at least one of a PTU searching signal, a PRU static signal, or a PRU dynamic signal. At least one of the information or the temperature information may be received.
  • the wireless power transmitter may perform operation 1520 before operation 1510.
  • the wireless power transmitter may control the plurality of power transmitters based on the received wireless power receiver related information.
  • the wireless power transmitter may determine a power transmitter to transmit power to the wireless power receiver among the plurality of power transmitters. In this case, the wireless power transmitter may not apply power to the remaining power transmitters other than the power transmitter to transmit power to the wireless power receiver.
  • the wireless power transmitter may determine at least one of a power amount, a current value, or a voltage value applied to each of the plurality of power transmitters. For example, the wireless power transmitter may use the plurality of power transmitters when transmitting power to the plurality of wireless power receivers.
  • the wireless power transmitter may determine at least one of a power amount, a current value, or a voltage value applied to the plurality of power transmitters.
  • 16A through 16C illustrate block diagrams of a wireless power transmission / reception system according to various embodiments of the present disclosure.
  • the wireless power transmitter 1610 may include a controller 1611, a communication unit 1612, a first power transmitter 1613, and a second power transmitter 1614.
  • the wireless power receiver 1620 may include a power receiver 1621, a communication unit 1622, and a load unit 1623.
  • the communication unit 1612 of the wireless power transmitter 1610 may communicate with the communication unit 1622 of the wireless power receiver 1620.
  • the communicator 1612 may receive wireless power receiver related information from the communicator 1622.
  • the wireless power receiver related information may include at least one of category information, voltage information, power information, current information, shape information, or temperature information of the wireless power receiver.
  • the communication unit 1612 and the communication unit 1622 may perform communication based on the Bluetooth low energy scheme.
  • the communication unit 1612 may receive at least one of a PTU searching signal, a PRU static signal, or a PRU dynamic signal.
  • the wireless power receiver related information may be included in at least one of a PTU searching signal, a PRU static signal, or a PRU dynamic signal.
  • the wireless power transmitter may obtain wireless power receiver related information from the received signal.
  • the controller 1611 may control at least one of the first power transmitter 1613 or the second power transmitter 1614 based on the received wireless power receiver related information.
  • the controller 1611 may determine the first power transmitter 1613 as a power transmitter to transmit power based on the related information of the wireless power receiver 1620. For example, the controller 1611 may determine the first power transmitter 1613 based on at least one of category information, voltage information, power information, current information, shape information, or temperature information of the wireless power receiver 1620. .
  • the power receiver 1621 of the wireless power receiver 1620 may receive wireless power from the first power transmitter 1613.
  • the power receiver 1621 may process the received wireless power and store the received wireless power in the load unit 1623.
  • the communication unit 1622 may transmit updated wireless power receiver related information to the communication unit 1612.
  • the controller 1611 may control at least one of the first power transmitter 1613 or the second power transmitter 1614 based on the updated wireless power receiver related information. For example, it is assumed that the temperature of the wireless power receiver rises from t1 to t2.
  • the controller 1611 may determine the first power transmitter 1613 as a power transmitter to transmit power in response to t1. Thereafter, the controller 1611 may determine the second power transmitter 1614 as the power transmitter to transmit power in response to t2. That is, the controller 1611 may change the power transmitter to transmit power.
  • the controller 1611 may be configured based on at least one of voltage information, power information, or current information of the wireless power receiver 1620. At least one of the first power transmitter 1613 or the second power transmitter 1614 may be controlled.
  • the communication unit 1612 may receive wireless power receiver related information from the communication unit 1632.
  • the controller 1611 of the wireless power transmitter 1610 may determine, for example, the second power transmitter 1614 as a power transmitter to transmit power based on the received wireless power receiver related information.
  • the related information of the wireless power receiver 1630 may be different from the related information of the wireless power receiver 1620, so that the controller 1611 transmits power to the second power transmitter 1614.
  • the power receiver 1631 may receive wireless power from the second power transmitter 1614, and the received wireless power may be stored in the load unit 1633.
  • the 16C illustrates an example in which the wireless power receiver 1620 and the wireless power receiver 1630 receive wireless power from the wireless power transmitter 1610.
  • the communicator 1612 may receive the wireless power receiver 1620 related information from the communicator 1622, and may receive the wireless power receiver 1630 related information from the communicator 1632.
  • the controller 1611 may control the first power transmitter 1613 and the second power transmitter 1614 based on the received wireless power receiver 1620 related information and the wireless power receiver 1630 related information. For example, the controller 1611 may control power applied to the first power transmitter 1613 and the second power transmitter 1614. Meanwhile, it is merely exemplary that the controller 1611 determines both the first power transmitter 1613 and the second power transmitter 1614 as a power transmitter to transmit power. If it is determined that one of the first power transmitter 1613 and the second power transmitter 1614 can transmit power to both wireless power receivers 1620 and 1630, the controller 1611 uses one power transmitter. Control to transmit power to the two wireless power receivers 1620 and 1630.
  • 17 is a circuit diagram illustrating a wireless power transmission and reception system according to various embodiments of the present disclosure.
  • the wireless power transmitter may include an amplifier 1711, a first capacitor 1712, a first coil 1713, a second coil 1714, and a switch 1715.
  • the first wireless power receiver may include a third coil 1721, a second capacitor 1722, and a first load unit 1723.
  • the second wireless power receiver may include a fourth coil 1731, a third capacitor 1732, and a second rod unit 1733.
  • the first coil 1713 may form an inductive coupling with the coefficient of K2 with the third coil 1721, and the second coil 1714 may have an inductive coupling with the coefficient of K3 with the fourth coil 1731.
  • the first coil 1713 may form an inductive coupling with a coefficient of K4 with the second coil 1714.
  • the second coil 1714 may correspond to the master power transmitter, and K2 may be greater than K3.
  • the first coil 1713 and the second coil 1714 may be connected in series with each other. Meanwhile, the wireless power transmitter may determine whether to use the first coil 1713 or both the first coil 1713 and the second coil 1714 based on the communication result. For example, when it is determined that only the first wireless power receiver is disposed, the wireless power transmitter may use only the first coil 1713. In addition, when it is determined that the first wireless power receiver and the second wireless power receiver are arranged, the wireless power transmitter may use both the first coil 1713 and the second coil 1714. The wireless power transmitter may control on / off of the switch 1715 based on the coil determination result to be used.
  • the wireless power transmitter may control the switch 1715 in the on state, and in the case of using the first coil 1713 and the second coil 1714, the wireless power transmitter may The switch 1715 can be controlled to the off state.
  • the wireless power transmitter may control the voltage applied to each coil or the amount of power transmitted from each coil.
  • the coupling coefficient may be proportional to the overlap ratio of the wireless power transmitter and the wireless power receiver.
  • the overlap ratio may be a ratio between the overlap area and the total area.
  • the wireless power transmitter may distribute power by adjusting the coupling coefficient.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un procédé de commande d'un émetteur d'énergie sans fil qui émet de l'énergie sans fil vers au moins un récepteur d'énergie sans fil. Le procédé de commande d'un émetteur d'énergie sans fil, conformément à la présente invention, peut comprendre les étapes suivantes : réception d'informations en rapport avec un récepteur d'énergie sans fil de la part d'au moins l'un de chacun des récepteurs d'énergie sans fil ; et commande de chacun d'une pluralité d'unités d'émission d'énergie incluses dans l'émetteur d'énergie sans fil en se basant sur les informations en rapport avec le récepteur d'énergie sans fil.
PCT/KR2015/001476 2014-02-20 2015-02-13 Émetteur d'énergie sans fil et procédé de commande d'un émetteur d'énergie sans fil WO2015126103A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/120,693 US10164479B2 (en) 2014-02-20 2015-02-13 Wireless power transmitter and method for controlling wireless power transmitter

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2014-0019940 2014-02-20
KR20140019940 2014-02-20
KR10-2015-0021856 2015-02-12
KR1020150021856A KR102363633B1 (ko) 2014-02-20 2015-02-12 무선 전력 송신기 및 무선 전력 송신기의 제어 방법

Publications (1)

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WO2015126103A1 true WO2015126103A1 (fr) 2015-08-27

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106374571A (zh) * 2016-09-30 2017-02-01 宇龙计算机通信科技(深圳)有限公司 一种终端及充电方法
WO2017200282A1 (fr) * 2016-05-20 2017-11-23 엘지이노텍(주) Procédé d'exploitation d'un récepteur multimode
US20180102676A1 (en) * 2016-10-11 2018-04-12 Honda Motor Co., Ltd. Power transmission apparatus
WO2017191955A3 (fr) * 2016-05-02 2018-08-02 엘지이노텍(주) Procédé de fonctionnement d'un émetteur multimode

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US20060050798A1 (en) * 2004-09-09 2006-03-09 Odigie Erumusele O Apparatus, system, and method for managing transmission power in a wireless communication system
US20110031928A1 (en) * 2007-12-21 2011-02-10 Soar Roger J Soldier system wireless power and data transmission
JP2012050321A (ja) * 2010-07-28 2012-03-08 Semiconductor Energy Lab Co Ltd 無線給電システム、及び無線給電方法
KR20120061085A (ko) * 2009-08-07 2012-06-12 오클랜드 유니서비시즈 리미티드 도로에서 전력을 공급받는 전기 차량 시스템
KR20140007237A (ko) * 2012-07-09 2014-01-17 삼성전자주식회사 무선 전력 송신기 및 그 제어 방법

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Publication number Priority date Publication date Assignee Title
US20060050798A1 (en) * 2004-09-09 2006-03-09 Odigie Erumusele O Apparatus, system, and method for managing transmission power in a wireless communication system
US20110031928A1 (en) * 2007-12-21 2011-02-10 Soar Roger J Soldier system wireless power and data transmission
KR20120061085A (ko) * 2009-08-07 2012-06-12 오클랜드 유니서비시즈 리미티드 도로에서 전력을 공급받는 전기 차량 시스템
JP2012050321A (ja) * 2010-07-28 2012-03-08 Semiconductor Energy Lab Co Ltd 無線給電システム、及び無線給電方法
KR20140007237A (ko) * 2012-07-09 2014-01-17 삼성전자주식회사 무선 전력 송신기 및 그 제어 방법

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017191955A3 (fr) * 2016-05-02 2018-08-02 엘지이노텍(주) Procédé de fonctionnement d'un émetteur multimode
WO2017200282A1 (fr) * 2016-05-20 2017-11-23 엘지이노텍(주) Procédé d'exploitation d'un récepteur multimode
CN106374571A (zh) * 2016-09-30 2017-02-01 宇龙计算机通信科技(深圳)有限公司 一种终端及充电方法
US20180102676A1 (en) * 2016-10-11 2018-04-12 Honda Motor Co., Ltd. Power transmission apparatus
US10742073B2 (en) * 2016-10-11 2020-08-11 Honda Motor Co., Ltd. Power transmission apparatus

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