KR20200026856A - Hybrid type wireles power receiving device, method of controlling wireless power signal in hybrid type wireles power receiving device, and magnetic resonance type wireless power receiving device related to the same - Google Patents

Abstract

The present invention relates to a hybrid type wireless power reception device capable of increasing efficiency in wireless power communications, a wireless power signal control method thereof, and a magnetic resonance type wireless power reception device related to the same. According to the present invention, the hybrid type wireless power reception device comprises: a transmission coil receiving an induced power signal; an antenna installed around the transmission coil to receive a resonant power signal; a rectification unit rectifying alternating current power generated by the induced power signal and the resonant power signal to generate rectified power; a converter converting the rectified power; a voltage stabilization circuit installed between the rectification unit and the converter; and a reception control unit supplying the rectified power to the voltage stabilization circuit when the induced power signal and the resonant power signal are received at an initial stage, and supplying the rectified power to the converter when it is determined that the rectified power rectified by the induced power signal and the resonant power signal is within a reference range.

Description

HYBRID TYPE WIRELES POWER RECEIVING DEVICE, METHOD OF CONTROLLING WIRELESS POWER SIGNAL IN HYBRID TYPE WIRELES POWER RECEIVING DEVICE, AND MAGNETIC RESONANCE TYPE WIRELESS POWER RECEIVING DEVICE RELATED TO THE SAME}

The present invention relates to a hybrid wireless power receiver, a wireless power signal control method in a hybrid wireless power receiver, and a magnetic resonance wireless power receiver associated with the same.

With the development of wireless communication technology, it is becoming a ubiquitous information environment where anyone can send and receive all information anytime, anywhere. However, until now, communication information devices are mostly dependent on batteries, and the use of communication information devices is limited by being supplied with a wired power cord.

Therefore, the wireless information network environment cannot be truly free without solving the problem of terminal power supply.

In order to solve this problem, many methods for wirelessly transmitting power have been developed, such as a radio wave reception type using a microwave, a magnetic induction method using a magnetic field, or a magnetic resonance method by switching energy between a magnetic field and an electric field. This is representative.

Here, the radio wave reception method has an advantage that power can be transmitted over a long distance by radiating radio waves into the air through an antenna, but the radiation loss consumed in the air is very large, which limits the efficiency of power transmission.

In addition, the magnetic induction method uses a transmission coil as a transmitter and a secondary coil as a receiver, using magnetic energy coupling by primary and secondary coils. In order for the primary and secondary coils to be adjacent to a short distance of a few millimeters, there is a drawback that the efficiency of power transmission is radically changed by the alignment of the primary and secondary coils.

Therefore, recently, a magnetic resonance method, which is similar to the magnetic induction method, transmits power in the form of magnetic energy by concentrating energy at a specific resonance frequency by a coil type inductor L and a capacitor C. The magnetic resonance method has an advantage of transmitting a relatively large amount of energy up to several meters, but requires a high quality factor. That is, the magnetic resonance method has a disadvantage in that the efficiency is drastically changed depending on whether the impedance is matched or the resonance frequency is matched.

Accordingly, a wireless power transmission system that combines the advantages of the magnetic induction method and the magnetic resonance method has been proposed.

The present invention improves the compatibility of wireless power communication by receiving both a resonance power signal and an induction power signal, and hybrid type wireless power that can prevent defects caused by unstable power supply that may occur early in the wireless power signal input. An object of the present invention is to provide a wireless power signal control method in a receiver, a hybrid wireless power receiver, and a magnetic resonance wireless power receiver associated with the same.

In order to solve the above problems, an embodiment of the present invention provides a hybrid wireless power transmission apparatus comprising: a transmission coil for receiving an induction power signal; An antenna installed around the transmitting coil to receive a resonance power signal; A rectifier for rectifying AC power generated by the induced power signal and the resonance power signal to generate rectified power; A converter for converting the rectified power; A voltage stabilization circuit provided between the rectifier and the converter; And when the resonance power signal and the induced power signal are initially received, supply the rectified power to the voltage stabilization circuit, and determine the rectified power rectified by the resonance power signal and the induced power signal within a reference range. And a reception control unit supplying the rectified power to the converter after turning off the voltage stabilization circuit.

According to an aspect of an embodiment of the present invention, the hybrid type wireless power transmission apparatus further includes a variable capacitor connected to the antenna, and the reception controller, if the magnetic resonance wireless power transmission apparatus recognizes through the antenna The variable capacitor may be controlled to receive the first resonance power signal at a reception frequency spaced apart from the resonance frequency.

According to an aspect of an embodiment of the present invention, the reception control unit may control to receive the resonance power reception signal at a resonance frequency by re-adjusting the variable capacitor after a reference time elapses after the reception of the initial resonance power signal. Can be.

According to an aspect of an embodiment of the present invention, the hybrid wireless power receiver may further include a short range communication module for transmitting the charging state information generated by the resonance power signal.

According to an aspect of an embodiment of the present invention, the hybrid wireless power receiver further includes a voltage sensor disposed between the rectifier and the converter, wherein the reception controller is a reference to the voltage measured from the voltage sensor When within the range, the rectified power can be controlled to turn off the voltage stabilization circuit and supply the rectified power to the converter.

According to an aspect of an embodiment of the present invention, the rectifier includes: a resonance rectifier for rectifying the power generated by the resonance power signal; An induction rectifier for rectifying power generated by the induction power signal; And a switching unit for selecting one of the resonance rectifying unit and the induction rectifying unit.

In another embodiment of the present invention, a method of controlling a wireless power signal in a hybrid wireless power receiver includes: a rectifying unit when initially receiving one of a resonance power signal from a magnetic resonance transmitter and a wireless power signal of an inductive transmission apparatus Turning on the voltage stabilization circuit located in the rear stage; And when the rectified power rectified by the resonance power signal and the induced power signal is determined to be within a reference range, turning off the stabilization circuit and supplying the rectified power to the converter.

According to an aspect of another embodiment of the present invention, the resonance power signal may be received through a loop antenna, and the induced power signal may be received through a receiving coil surrounded by the loop antenna.

According to an aspect of another embodiment of the present invention, if the initial reception of one of the resonance power signal from the magnetic resonance transmission device and the wireless power signal of the inductive transmission device, turning on the voltage stabilization circuit located at the rear of the rectifier At the first reception of the resonance power signal, adjusting the variable capacitor connected to the antenna may include receiving the first resonance power signal at a separation reception frequency spaced apart from the resonance frequency.

According to an aspect of another embodiment of the present invention, the method for controlling a wireless power signal in the hybrid wireless power receiver includes resonating the variable capacitor after a reference time elapses after the initial resonance power signal is received. The method may further include receiving the resonance power received signal at a frequency.

Magnetic resonance wireless power receiver according to another embodiment of the present invention, the receiving antenna for receiving a resonance power signal; A variable capacitor connected to the antenna; A rectifier for rectifying AC power generated by the resonance power signal to generate rectified power; A converter for converting the rectified power; Recognizing a magnetic resonance wireless power transmission apparatus through the antenna, it may include a resonance reception control unit for controlling the variable capacitor to receive the first resonance power signal at a separate reception frequency spaced apart from the resonance frequency.

 According to an aspect of another embodiment of the present invention, the resonance reception control unit, after the reference time elapses after receiving the initial resonance power signal, readjusts the variable capacitor to receive the resonance power reception signal at a resonance frequency. Can be controlled.

According to the exemplary embodiment of the present invention having the above-described configuration, since both the induced power signal and the resonance power signal can be charged and charged regardless of the type of transmission device, device compatibility is increased.

In addition, according to one embodiment of the present invention, it is possible to prevent sudden sudden pressure increase outside the reference range that may be generated at the initial stage of charging, thereby contributing to improving the durability of the product.

1 is a block diagram illustrating an operation of a wireless power transmission system including a hybrid wireless power receiver according to an embodiment of the present invention.
2 is a block diagram illustrating an electronic configuration of a hybrid wireless power receiver according to an embodiment of the present invention.
Figure 3 is a block diagram illustrating the electronic configuration of the rectifier of the hybrid wireless power receiver according to an embodiment of the present invention.
Figure 4 is a block diagram illustrating the electronic configuration of the magnetic resonance wireless power receiver according to another embodiment of the present invention.
5 is a flowchart illustrating a wireless power transmission control method according to an embodiment of the present invention.

Hereinafter, a hybrid wireless power receiver, a wireless power signal control method in a hybrid wireless power receiver, and a magnetic resonance wireless power receiver associated with the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating an operation of a wireless power transmission system including a hybrid wireless power receiver according to an embodiment of the present invention. As shown in FIG. 1, the wireless power system according to the present invention may be configured of a wireless power transmitter 100 and a wireless power receiver 200.

The hybrid wireless power receiver 200 according to the present invention may receive both power signals (induction power signal and resonance power signal) from the inductive type wireless power transmitter 100 and the resonance type power transmitter 10. Can be.

In more detail, the induction power signal from the induction type power transmission device 20 is received through the receiving coil 211 of the reception block 210 (see FIG. 2), and the resonance type power transmission device ( The resonance power signal from 10 is received through the loop antenna 213 positioned around the receiving coil 211.

Accordingly, the hybrid wireless power receiver 200 according to the present invention can receive both an induction power signal and a resonance power signal, and can supply power to the load 280 using these power signals.

Hereinafter, the configuration of the hybrid wireless power receiver will be described in more detail with reference to FIG. 2.

2 is a block diagram illustrating an electronic configuration of a hybrid wireless power receiver according to an embodiment of the present invention. As shown in FIG. 2, the hybrid wireless power receiver 200 according to the present invention includes a reception block 210, a rectifier 220, a voltage stabilization circuit 230, a converter 240, and a voltage sensor 250. ), A short range communication module 260, a reception controller 270, and a load 280 may be configured.

The receiving block 210 is a component for receiving a wireless power signal, and as shown in FIG. 2, includes a receiving coil 211, an antenna 213, and a variable capacitor 215 connected to the antenna 213. can do.

The receiving coil 211 is for receiving the induced power signal when the wireless power transmitter 200 oscillates the induced power signal. The receiving coil 211 functions to generate alternating current power by electromagnetic induction of a power signal in a low frequency region of 100 to 205 KHz.

The antenna 213 is for receiving the resonance power signal when the wireless power transmitter 100 oscillates the resonance power signal. The antenna 213 functions to generate AC power by a resonance method for power signals in a high frequency region of 6.78 MHz ± 5%.

When the variable capacitor 215 recognizes the resonance type wireless power transmitter 10 through the antenna 213, the variable capacitor 215 may serve to space the resonance frequency of the antenna 213. That is, the reception controller 270 may adjust the variable capacitor 215 to receive the resonance power signal at a separation reception frequency spaced apart from the resonance frequency.

The rectifier 220 rectifies the AC power received by the reception block 210 into DC power. That is, the rectified power is generated by rectifying the AC power in the antenna 213 generated by the AC power in the receiving coil 211 or the resonance power signal generated in the induced power signal. The structure of the rectifier 220 will be described in more detail with reference to FIG. 3.

The voltage stabilization circuit 230 is positioned between the rectifier 220 and the converter 240, and when receiving an initial wireless power signal, performs a function of stabilizing a voltage of power flowing into the converter 240 by applying a virtual load. To perform.

The voltage sensor 250 is positioned between the rectifier 220 and the converter 240 to measure the voltage of the rectified power generated by the wireless power signal. That is, the reception control unit 270 may check whether the current flowing into the converter 240 is within the normal range through the voltage of the rectified power received through the voltage sensor 250.

The converter 240 converts rectified power into a power required by the load 280.

The short-range communication module 260 receives a resonance power signal when the wireless power transmitter 100 is in a resonance manner, and supplies power to the load 280 accordingly. At this time, the power of the load 280 In order to facilitate the supply function to transmit the state of charge information of the load 280. In the case of the induction method, the charging state information of the load 280 is transmitted to the ASK communication through the receiving coil 211.

The reception control unit 270 causes the rectified power to be supplied to the voltage stabilization circuit 230 when the resonance power signal and the induced power signal are initially received, and by the resonance power signal and the induced power signal. When the rectified rectified power is determined to be within a reference range, the rectified power is turned off and then the rectified power is supplied to the converter 240. In addition, the reception control unit 270 functions to control the variable capacitor 215 to receive the resonance power reception signal at a resonance frequency after a reference time elapses after the reception of the first resonance power signal.

In addition, the reception control unit 270 may receive the voltage information signal measured from the voltage sensor 250, and when the measured voltage value of the voltage information signal falls within a reference range, the reception control unit 270 may normally supply power to the load 280. The voltage stabilization circuit 230 is turned off, and the rectifier power is supplied to the converter 240. The operation of the reception controller 270 and the power reception operation of the overall hybrid wireless power receiver 200 will be described in more detail with reference to FIG. 5.

Hereinafter, a detailed configuration of the rectifier 220 of the hybrid wireless power receiver 200 will be described in more detail with reference to FIG. 3.

3 is a block diagram illustrating the electronic configuration of the rectifier of the hybrid wireless power transmission apparatus according to an embodiment of the present invention.

As described above, the rectifier 220 functions to rectify the AC power generated by the reception block 210 to convert the DC power. The rectifier 220 may include a resonance rectifier 221 for rectifying the power generated by the resonance power signal from the resonance power transmitter 10, and an induced power signal from the induction power transmitter 20. It may include an induction rectifier 223 for rectifying the power generated by the, and a switching unit 225 for selecting one of the resonance rectifier 221 and the induction rectifier 223.

That is, when the reception controller 270 determines the type of the wireless power transmitter 100 that oscillates the wireless power signal, the reception controller 270 controls the switching unit 225 to select and rectify one of the rectifiers corresponding to the type. . As such, by rectifying in a two-channel manner, not only the rectification efficiency is increased but also the current is prevented from leaking to the receiving block 210 on the side that does not receive the wireless power signal, thereby increasing the power transmission efficiency.

Hereinafter, an example in which the function of the hybrid wireless power receiver according to the embodiment of the present invention is applied to a magnetic resonance equation will be described in more detail with reference to FIG. 4.

4 is a block diagram illustrating an electronic configuration of a magnetic resonance wireless power receiver according to another embodiment of the present invention. As shown in FIG. 4, the magnetic resonance wireless power receiver 300 includes a reception block 310 including an antenna 313 and a variable capacitor 315, a rectifier 320, a voltage stabilization circuit 330, The converter 340 may include a voltage sensor 350, a short range communication module 360, a resonance reception controller 370, and a load 380.

Here, since the rectifier 320, the voltage stabilization circuit 330, the converter 340, the voltage sensor 350, the short-range communication module 360, and the load 380 have the same functions as those of the same name components in FIG. 3. The description thereof will be omitted.

Unlike the reception block 210 of FIG. 3, the reception block 310 of the magnetic resonance type wireless power receiver 300 illustrated in FIG. 4 includes only the antenna 313 and the variable capacitor 315. When the resonance reception control unit 370 recognizes the magnetic resonance wireless power transmitter through the antenna 313, the resonance reception control unit 370 adjusts the variable capacitor 315 to receive the first resonance power signal at a separation reception frequency spaced apart from the resonance frequency. To control. That is, since the resonance power signal is received through the separate reception frequency instead of the resonance frequency when the initial power supply is received, the surge voltage is prevented from being generated. In addition, the resonance reception control unit 370, after the reference time elapses after receiving the initial resonance power signal, controls the variable capacitor 315 to receive the resonance power signal at the resonance frequency by controlling the surge voltage. After the prevention of charging is possible optimally.

Hereinafter, a method of controlling a wireless power signal in a hybrid wireless power receiver having the above-described configuration will be described in detail with reference to FIG. 5. It will be appreciated that the wireless power signal control method described in FIG. 5 may also be used in the magnetic resonance wireless power receiver of FIG. 4.

5 is a flowchart illustrating a wireless power transmission control method according to an embodiment of the present invention. As shown in FIG. 4, first, when the hybrid type wireless power receiver 200 is located at a charging distance (resonance method) or a charging position (induction method), the wireless power transmitter 100 may receive an object detection signal. It will confirm that an external object is detected. At this time, when the wireless power transmitter 100 is an induction method, it is possible to check whether the external object is the induction power receiver 20 by using a pulse signal from the transmission coil. That is, when the external object is the induction type power transmitter 20, the ASK communication signal is transmitted by the wireless power receiver 200 through the receiving coil 211, and accordingly, the wireless power transmitter 100 transmits an ID. The request signal is transmitted through the transmission coil.

 When the wireless power transmitter 100 is a resonance method, it is possible to determine whether the external object is the resonance type power receiver 10 using the pulse signal from the antenna 213, and the external object is the resonance type power transmission. If the device 10 is confirmed, the wireless power transmitter 100 transmits an ID request signal to the wireless power receiver 200 through the short range communication module 260 (S13).

Then, the wireless power receiver 200 transmits the ID signal to the receiving coil 211 (in the case of the induction method) or the short range communication module 260 (in the case of the resonance method) (S21). Then, the wireless power transmitter 100 transmits a wireless power signal accordingly. That is, when the hybrid type wireless power receiver 200 initially receives one of a resonance power signal from the resonance power transmitter 10 and a wireless power signal of the induction type power transmitter 20, the rectifier 220 may be used. The voltage stabilization circuit 230 located at the rear end is turned on. If the power signal is a resonance power signal, the variable capacitor 215 connected to the antenna 213 is adjusted to set the reception frequency spaced apart from the resonance frequency to receive the first resonance power signal (S23).

Next, the reception controller 270 checks the voltage of the rectified power between the rectifier 220 and the converter 240 through the voltage sensor 250 (S25). When it is determined that the checked rectified voltage is in the normal range, the voltage stabilization circuit 230 is turned off, and the variable capacitor 215 is readjusted so as to receive the resonance signal at the resonance frequency (S27). In the induction method, when the rectified power rectified by the induced power signal is determined to be within a reference range, the rectified circuit 230 is turned off and the rectified power is supplied to the converter 240. Alternatively, without checking the voltage of the rectified power before rectifying, the reception controller 270 readjusts the variable capacitor 215 to receive the resonance power at a resonance frequency after a reference time has elapsed after receiving the initial resonance power signal. Can receive a signal.

As described above, the variable capacitor 215 of the antenna 213 is readjusted to receive the resonance power signal through the antenna 213 having the resonance frequency, and thus the rectified power is applied to the load 280 to charge. It continues (S29). At this time, the reception control unit 270 of the wireless power receiver 200 generates charge state information of the load 280 and transmits the generated state information of the load 280 to the wireless power transmitter through the short range communication module 260. In operation 100, the wireless power signal is changed and oscillated so as to have an optimal transmission efficiency by changing the frequency or strength of the wireless power signal (S31 and S17).

According to the exemplary embodiment of the present invention having the above-described configuration, since both the induced power signal and the resonance power signal can be charged and charged regardless of the type of transmission device, device compatibility is increased.

In addition, according to one embodiment of the present invention, it is possible to prevent sudden step-up phenomenon (surge voltage) and the like outside the reference range that may occur at the initial stage of charging, thereby contributing to improving the durability of the product.

As described above, the hybrid wireless power receiver, the wireless power signal control method in the hybrid wireless power receiver, and the related magnetic resonance wireless power receiver may be applied in a limited configuration and method. Rather, the embodiments may be configured by selectively combining all or part of the embodiments so that various modifications can be made.

10: magnetic resonance power transmission device
20: induction power transmission device
100: wireless power transmission device
200: hybrid wireless power receiver
210: reception block
211: receiving coil
213: antenna (loop antenna)
215: variable capacitor
220: rectifier
230: voltage stabilization circuit
240: converter
250: voltage sensor
260: short range communication module
270: reception control unit
280: load (battery)

Claims (10)

A receiving coil for receiving an induced power signal;
A receiving antenna installed around the receiving coil to receive a resonance power signal;
A rectifier for rectifying AC power generated by the induced power signal or the resonance power signal to generate rectified power;
A converter for converting the rectified power;
A voltage stabilization circuit installed between the rectifier and the converter to stabilize a voltage of power flowing into the converter; And
And a reception control unit for supplying the rectified power to the voltage stabilization circuit when the resonance power signal or the induction power signal is initially received.
The method of claim 1,
Further comprising a variable capacitor connected to the antenna,
The reception control unit,
And recognizing a magnetic resonance wireless power transmitter through the antenna, controlling the variable capacitor to control to receive an initial resonance power signal at a separate reception frequency spaced from a resonance frequency.
The method of claim 2,
The reception control unit,
And a reference time elapses after receiving the initial resonance power signal, and controls the variable capacitor to receive the resonance power received signal at a resonance frequency.
The method of claim 1,
And a short range communication module for transmitting the charging state information generated by the resonance power signal.
The method of claim 1,
Further comprising a voltage sensor disposed between the rectifier and the converter,
The reception control unit,
And when the voltage measured from the voltage sensor is within a reference range, turning off the voltage stabilization circuit and supplying the rectified power to the converter.
The method of claim 1,
The rectifying unit,
A resonance rectifier for rectifying the power generated by the resonance power signal;
An induction rectifier for rectifying power generated by the induction power signal; And
And a switching unit for selecting one of the resonance rectifying unit and the induction rectifying unit.
Receiving a resonance power signal or an induced power signal from a wireless power transmission device;
Generating rectified power by rectifying AC power generated from the resonance power signal or the induced power signal; And
When the resonance power signal or the induced power signal is initially received, turning on a voltage stabilization circuit to stabilize the rectified power flowing into the converter, the wireless power signal control method in a hybrid wireless power receiver. .
The method of claim 7, wherein
And the resonance power signal is received through a loop antenna, and the induced power signal is received through a receiving coil surrounded by the loop antenna.
The method of claim 7, wherein
When initially receiving the resonance power signal or the induced power signal, turning on the voltage stabilization circuit to stabilize the rectified power flowing into the converter
Upon initial reception of the resonance power signal, adjusting the variable capacitor connected to the antenna to receive the initial resonance power signal at a separate reception frequency spaced from the resonance frequency, wireless power in a hybrid wireless power receiver Signal control method.
The method of claim 9,
And receiving a resonance power reception signal at a resonance frequency by re-adjusting the variable capacitor after a reference time has elapsed after the reception of the first resonance power signal. .

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