KR20170089350A - Wirelessly power tranceiver - Google Patents

Abstract

A wireless power transceiver according to one technical aspect of the present invention may include a resonator magnetically coupled to a wireless power transmitting apparatus or a wireless power receiving apparatus, a bridge circuit part connected to the resonator and operating as a rectifier in a power reception mode and as an inverter in a power transmission mode, and a bidirectional converter connected to the bridge circuit part and performs reduced voltage operation in the power reception mode and performs boosting operation in the power transmission mode. Power transmission or power reception can be performed in both directions.

Description

[0001] WIRELESSLY POWER TRANCEIVER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless power transmission / reception device capable of power transmission or power reception in both directions.

Wireless power transfer technology has been extensively applied to a variety of communication devices and chargers of various household appliances, and can be applied to electric vehicles in the future.

Wireless power transmission technology is being developed in various ways, and different frequencies are used depending on each method. For example, a frequency of 110 kHz to 205 kHz is used in the magnetic induction method according to the WPC (Wireless Power Consortium) standard, and a frequency of 6.78 MHz is used in the self resonance method that is different from the A4WP (Alliance for Wireless Power) standard.

On the other hand, in the wireless power transmission technology, there is a problem in that compatibility with each other becomes difficult when such a different scheme is used. There is a problem in that the size of each of the wireless power transmission apparatuses and the receiving apparatuses corresponding to different wireless charging standards is increased.

Korean Patent Publication No. 2012-0112462 Korean Patent Laid-Open Publication No. 2014-0112357

It is an object of one embodiment of the present invention to provide a wireless power transceiver capable of bi-directional power transmission or power reception while supporting various wireless charging standards.

One technical aspect of the present invention proposes an embodiment of a wireless power transceiver. The wireless power transmission / reception apparatus includes: a resonator that magnetically couples with a wireless power transmission apparatus or a wireless power reception apparatus; a bridge circuit unit that is connected to the resonator and operates as a rectifier in a power reception mode and as an inverter in a power transmission mode; And a bidirectional converter connected to the bridge circuit unit and operating in a reduced voltage in the power reception mode and boosting in the power transmission mode.

Another aspect of the present invention proposes another embodiment of a wireless power transceiver. Wherein the wireless power transmitting and receiving device includes a first resonant circuit having a first resonant frequency, a second resonant circuit having a second resonant frequency lower than the first resonant frequency, and a plurality of bridge circuits, A first resonance circuit connected to the first resonance circuit, a remaining part of the plurality of bridge circuits connected to the second resonance circuit, and a bridge circuit part connected to the bridge circuit part, and in the power reception mode, And a bidirectional converter for boosting the second voltage provided in the load in the power transmission mode.

The solution of the above-mentioned problems does not list all the features of the present invention. Various means for solving the problems of the present invention can be understood in detail with reference to specific embodiments of the following detailed description.

The wireless power transmitting / receiving apparatus according to an embodiment of the present invention can provide various wireless charging standards while providing an effect of power transmission or power reception in both directions.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a device including a wireless power transceiver according to an embodiment of the present invention and a wireless power charging system including the same. FIG.
2 is a block diagram illustrating a wireless power transceiver according to an embodiment of the present invention.
3 is a circuit diagram showing an example of a wireless power transceiver according to an embodiment of the present invention.
4 and 5 are reference circuit diagrams illustrating a power receiving operation using the first resonant circuit of the wireless power transmitting / receiving device shown in FIG.
FIG. 6 is a reference circuit diagram illustrating a power transmission operation using the first resonant circuit of the wireless power transmitting / receiving device shown in FIG. 3. FIG.
FIGS. 7 and 8 are reference circuit diagrams illustrating a power receiving operation using the second resonant circuit of the wireless power transmitting / receiving apparatus shown in FIG.
9 is a reference circuit diagram illustrating a power transmission operation using the second resonant circuit of the wireless power transmitting / receiving device shown in FIG.
10 is a circuit diagram showing another example of a wireless power transceiver according to an embodiment of the present invention.
11 and 12 are reference circuit diagrams illustrating a power receiving operation using the first resonant circuit of the wireless power transmitting / receiving apparatus shown in FIG.
13 is a reference circuit diagram for explaining a power transmission operation using the first resonant circuit of the wireless power transmitting / receiving apparatus shown in Fig.
FIGS. 14 and 15 are reference circuit diagrams illustrating a power receiving operation using the second resonant circuit of the wireless power transmitting / receiving device shown in FIG.
16 is a reference circuit diagram illustrating a power transmission operation using the second resonant circuit of the wireless power transmitting / receiving device shown in Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

It is to be understood that when an element is referred to herein as being "connected" to another element, it may be directly connected to the other element, although other elements may be present in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a device including a wireless power transceiver according to an embodiment of the present invention and a wireless power charging system including the same. FIG.

Referring to FIG. 1, a wireless power charging system includes a wireless power transmission / reception device 100 and a wireless power transmission device 20.

The wireless power transmission / reception device 100 can receive power from the wireless power transmission device 20 and provide it to the electronic device 10. [

1, the wireless power transmission / reception device 100 performs a wireless power reception function. Alternatively, the wireless power transmission / reception device 100 may perform a function of providing wireless power.

For example, the wireless power transmitting / receiving device 100 may transmit power to another wireless power receiving device based on the power of the power storage device (for example, battery) of the electronic device 10. [

As described above, the wireless power transmission / reception device 100 according to an embodiment of the present invention receives power wirelessly and provides it to the electronic device 10, or wirelessly transmits power to the other device based on the power stored in the electronic device 10. [ As shown in FIG.

Such a wireless power transmission / reception device will be described in more detail with reference to FIG. 2 to FIG.

2 is a block diagram illustrating a wireless power transceiver according to an embodiment of the present invention.

Referring to FIG. 2, the wireless power transceiver 100 includes a resonator 110, a bridge circuit 120, and a bidirectional converter 130.

The resonator 110 may be magnetically coupled to a wireless power transmission device or a wireless power reception device. That is, it can be magnetically coupled to the transmission resonator of the wireless power transmission apparatus or the reception resonator of the wireless power reception apparatus, and can receive or transmit power wirelessly.

In one embodiment, the resonator 110 may comprise a plurality of resonant circuits. Each of the plurality of resonance circuits may have different resonance characteristics.

The bridge circuit unit 120 is connected to the resonator 110, operates as a rectifier in the power reception mode, and operates as an inverter in the power transmission mode.

The bidirectional converter 130 is connected to the bridge circuit unit 120, and can perform the depressurization operation in the power reception mode and the boost operation in the power transmission mode.

FIG. 3 is a circuit diagram showing an example of a wireless power transceiver according to an embodiment of the present invention, and FIGS. 4 to 9 are reference circuit diagrams for explaining the operation of the wireless power transceiver shown in FIG.

Referring to FIG. 3, a wireless power transceiver 100 includes a resonator 110, a bridge circuit 120, and a bidirectional converter 130.

The resonator 110 may include a plurality of resonant circuits.

In the illustrated example, the resonator 110 includes a first resonant circuit composed of a first capacitor C1 and a first inductor L1, a second resonant circuit composed of a second capacitor C2 and a second inductor L2, .

The first resonant circuit (C1, L1) and the second resonant circuit (C2, L2) can have different resonance characteristics. For example, the first resonant circuit (C1, L1) may have a first resonant frequency, and the second resonant circuit (C2, L2) may have a second resonant frequency lower than the first resonant frequency.

)는 A4WP(Alliance for Wireless Power) 표준 주파수이고, 제2 공진 주파수(

)는 WPC(Wireless Power Consortium) 표준 주파수 또는 PMA(Power Matters Alliance) 표준 주파수가 되도록 제1 커패시터(C1) 및 제2 커패시터(C2) 각각의 커패시턴스와, 제1 인덕터 (L1) 및 제2 인덕터 (L2) 각각의 인덕턴스가 결정될 수 있다.The first frequency may be an Alliance for Wireless Power (A4WP) standard frequency, and the second frequency may be a Wireless Power Consortium (WPC) standard frequency or a Power Matters Alliance (PMA) standard frequency. In this case, the first resonance frequency (

) Is an A4WP (Alliance for Wireless Power) standard frequency, and the second resonant frequency

The capacitance of each of the first and second capacitors C1 and C2 and the capacitance of each of the first and second inductors L1 and L2 are set to be a WPC (Wireless Power Consortium) standard frequency or a PMA (Power Matrix Alliance) L2 may be determined.

The first resonant circuit (C1, L1) and the second resonant circuit (C2, L2) may have a common end. In the illustrated example, the first resonant circuit (C1, L1) and the second resonant circuit (C2, L2) have a common terminal connected to switch Q3 and switch Q4.

The bridge circuit unit 120 may include a plurality of bridge circuits.

In the present invention, the bridge circuit is composed of two switches, and refers to a circuit connected to one end of the first resonant circuit or the second resonant circuit. 3, the bridge circuit unit 120 includes a first bridge circuit including a first switch Q1 and a second switch Q2, and a third bridge circuit including a third switch Q3 and a fourth switch Q4 ), And a third bridge circuit composed of a fifth switch (Q5) and a sixth switch (Q6).

Specifically, one end of the first resonant circuit (C1, L1) is connected to the first bridge circuit (Q1, Q2), and a common end is connected to the second bridge circuit (Q3, Q4). One end of the second resonant circuit (C2, L2) is connected to the third bridge circuit (Q5, Q6).

The bridge circuit unit 120 may operate as a rectifier or an inverter depending on the operation of a plurality of bridge circuits.

For example, when the first resonant circuit (C1, L1) operates, the first bridge circuit (Q1, Q2) and the second bridge circuit (Q3, Q4) can operate as a rectifier or an inverter. On the other hand, when the second resonant circuit (C2, L2) operates, the second bridge circuit (Q3, Q4) and the third bridge circuit (Q5, Q6) can operate as a rectifier or an inverter.

The bidirectional converter 130 may reduce the first voltage supplied through the bridge circuit unit 120 and provide the reduced voltage to the load in the power receiving mode. Meanwhile, in the power transmission mode, the bidirectional converter 130 can boost the second voltage provided from the load and provide it to the bridge circuit unit 120.

The wireless power transceiver 100 may include a link capacitor Cl and the link capacitor Cl may be coupled to the bridge circuitry 120 and the bidirectional converter 130.

The link capacitor Cl may provide the charge stored in the power reception mode to the bidirectional converter 130, i.e., the load, and the charge stored in the power transmission mode, to the bridge circuit unit 120. [

The bi-directional converter 130 may include a first converter switch Qc1, a second converter switch Qc2, and a converter inductor Lc.

One end of the first converter switch Qc1 may be connected to one end of the link capacitor Cl and the other end of the first converter switch Qc1 may be connected to one end of the second converter switch Qc2 and one end of the converter inductor Lc .

One end of the second converter switch Qc2 is connected to the other end of the first converter switch Qc1 and one end of the converter inductor Lc. The other end of the second converter switch Qc2 may be connected to the other end of the link capacitor Cl.

One end of the converter inductor Lc may be connected to the other end of the first converter switch Qc1 and one end of the second converter switch Qc2 and the other end of the converter inductor Lc may be connected to one end of the load.

Hereinafter, the operation in each mode of the wireless power transmitting / receiving device 100 will be described with reference to FIG. 4 to FIG.

Figs. 4 and 5 are reference circuit diagrams illustrating a power receiving operation using the first resonant circuits C1 and L1 of the wireless power transmitting / receiving apparatus shown in Fig. 3. Fig.

The first resonant circuit (C1, L1) may be magnetically coupled to the resonant circuit of the power transmitting device to receive the AC input.

In one polarity of the AC input, the first switch Q1 of the first bridge circuits Q1 and Q2 and the fourth switch Q4 of the second bridge circuits Q3 and Q4, as shown in Fig. 4, , Charge can be stored in the link capacitor Cl.

5, the second switch Q2 of the first bridge circuits Q1 and Q2 and the third switch Q3 of the second bridge circuits Q3 and Q4 are turned on, A charge can be stored in the link capacitor Cl.

4 and 5, the first bridge circuits Q1 and Q2 and the second bridge circuits Q3 and Q4 can operate as a rectifying circuit.

On the other hand, the bi-directional converter 130 can vary the voltage of the link capacitor Cl and provide it to the load in accordance with the switching control for the first converter switch Qc1. For example, the first converter switch Qc1 may perform a switching operation in accordance with the pulse width modulation control to reduce the voltage of the link capacitor Cl and provide the reduced voltage to the load. At this time, the second converter switch Qc2 may not be switched-controlled, and in this case, current may flow through the path through the parasitic diode. On the other hand, if the path due to the parasitic diode does not exist, the second converter switch Qc2 can be set to the ON state.

FIG. 6 is a reference circuit diagram illustrating a power transmission operation using the first resonant circuit of the wireless power transmitting / receiving device shown in FIG. 3. FIG.

The first resonant circuits (C1, L1) are magnetically coupled to the resonant circuit of the power receiving device, and can provide AC power.

To this end, bidirectional converter 130 may step up the power supply of the load and provide it to link capacitor Cl. For example, by switching control (for example, pulse width modulation control) of the bidirectional converter 130 to the second converter switch Qc2, the power of the load is charged and discharged to the converter inductor Lc . At this time, the first converter switch Qc1 may not be switched, and in this case, current may flow through the path through the parasitic diode. On the other hand, if the path due to the parasitic diode does not exist, the first converter switch Qc2 can be set to the ON state.

The bridge circuit unit 120 may generate an AC power using the DC power stored in the link capacitor Cl and provide the generated AC power to the first resonance circuits C1 and L1.

For example, the bridge circuit unit 120 may generate AC power according to an alternate switching operation of the first switch Q1 and the fourth switch Q4. In this example, the third switch Q3 may be in the ON state.

In addition, the bridge circuit section 120 may operate in various ways.

For example, the fourth switch Q4 may be set to the ON state so as to be grounded, and the AC power supply may be generated in accordance with the alternate switching operation of the first switch Q1 and the second switch Q2.

For another example, the second switch Q2 may be set to the ON state to ground, and the AC power supply may be generated according to the alternate switching operation of the third switch Q3 and the fourth switch Q4.

Thus, in the power transmission mode, it can be seen that bidirectional converter 130 operates as a boost converter and bridge circuit 120 operates as an inverter.

FIGS. 7 and 8 are reference circuit diagrams illustrating a power receiving operation using the second resonant circuit of the wireless power transmitting / receiving apparatus shown in FIG.

The second resonant circuit (C2, L2) may be magnetically coupled to the resonant circuit of the power transmitting device to receive the AC input.

7, the third switch Q3 of the second bridge circuits Q3 and Q4 and the sixth switch Q6 of the third bridge circuits Q5 and Q6 are turned on , Charge can be stored in the link capacitor Cl.

8, the fourth switch Q4 of the second bridge circuits Q3 and Q4 and the fifth switch Q5 of the third bridge circuits Q5 and Q6 are turned on, A charge can be stored in the link capacitor Cl.

That is, as shown in Figs. 7 and 8, the second bridge circuits Q3 and Q4 and the third bridge circuits Q5 and Q6 can operate as a rectifying circuit.

The bidirectional converter 130 can vary the voltage of the link capacitor Cl and provide it to the load in accordance with the switching control for the first converter switch Qc1. For example, the first converter switch Qc1 may perform a switching operation in accordance with the pulse width modulation control to reduce the voltage of the link capacitor Cl and provide the reduced voltage to the load. At this time, the second converter switch Qc2 may not be switched-controlled, and in this case, current may flow through the path through the parasitic diode. On the other hand, if the path due to the parasitic diode does not exist, the second converter switch Qc2 can be set to the ON state.

9 is a reference circuit diagram illustrating a power transmission operation using the second resonant circuit of the wireless power transmitting / receiving device shown in FIG.

The second resonant circuits (C2, L2) can be magnetically coupled to the resonant circuit of the power receiving device to provide AC power.

To this end, bidirectional converter 130 may step up the power supply of the load and provide it to link capacitor Cl. For example, by switching control (for example, pulse width modulation control) of the bidirectional converter 130 to the second converter switch Qc2, the power of the load is charged and discharged to the converter inductor Lc . At this time, the first converter switch Qc1 may not be switched, and in this case, current may flow through the path through the parasitic diode. On the other hand, if the path due to the parasitic diode does not exist, the first converter switch Qc2 can be set to the ON state.

The bridge circuit unit 120 may generate and supply an AC power to the second resonant circuits C2 and L2 by using the DC power stored in the link capacitor Cl.

For example, the bridge circuit unit 120 may generate AC power according to the alternate switching operation of the third switch Q3 and the sixth switch Q6. In this example, the fifth switch Q5 may be in the ON state.

In addition, the bridge circuit section 120 may operate in various ways.

For example, the fourth switch Q4 may be set to the ON state to ground, and the AC power may be generated according to the alternate switching operation of the fifth switch Q5 and the sixth switch Q6.

As another example, the sixth switch Q6 may be set to the ON state to ground, and the AC power may be generated in accordance with the alternate switching operation of the third switch Q3 and the fourth switch Q4.

In Figs. 3 to 9, an example having a plurality of resonant circuits including a common terminal has been described, but this is merely an example.

3, the resonator 110 includes the first resonant circuit (C1, L1) and the second resonant circuit (C2, L2), which can be variously modified. For example, a first resonant circuit composed of a first capacitor and a first inductor may be a second resonant circuit composed of first and second capacitors (C1, C2) and first and second inductors .

On the other hand, the resonator may include a plurality of resonant circuits without a common terminal, and such an example will be described with reference to FIGS. 10 to 16. FIG.

10 is a circuit diagram showing another example of a wireless power transceiver according to an embodiment of the present invention.

Referring to FIG. 10, the resonator 111 may include a first resonant circuit and a second resonant circuit.

The first resonant circuit may include a first capacitor C11 and a first inductor L11 and the second resonant circuit may include a second capacitor C12 and a second inductor L12. The first resonant circuit may have a first resonant frequency and the second resonant circuit may have a second resonant frequency that is lower than the first resonant frequency.

The bridge circuit unit 120 may include a plurality of bridge circuits, at least some of the plurality of bridge circuits may be connected to the first resonant circuit, and the rest of the plurality of bridge circuits may be connected to the second resonant circuit.

In the illustrated example, the bridge circuit portion 121 includes four bridge circuits, the first bridge circuits Q11 and Q12 and the second bridge circuits Q13 and Q14 are connected to the first resonant circuit, Circuits Q15 and Q16 and fourth bridge circuits Q17 and Q18 are connected to the second resonant circuit.

It is already described that the bridge circuit unit 121 operates as a rectifier in the power reception mode and operates as an inverter in the power transmission mode.

A link capacitor Cl1 is connected to one end of the bridge circuit unit 121, and a bidirectional converter 131 is also connected.

The link capacitor Cl1 can provide the stored charge to the bidirectional converter 131 side, that is, to the load in the power reception mode, and to provide the stored charge to the bridge circuit unit 121 in the power transmission mode.

In the power receiving mode, bidirectional converter 131 can reduce the first voltage supplied through bridge circuit 121 and provide it as a load. On the other hand, in the power transmission mode, the second voltage provided from the load can be stepped up and provided to the link capacitor Cl1.

The bi-directional converter 130 may include a first converter switch Qc11, a second converter switch Qc12, and a converter inductor Lc1.

One end of the first converter switch Qc11 may be connected to one end of the link capacitor Cl1 and the other end of the first converter switch Qc11 may be connected to one end of the second converter switch Qc12 and one end of the converter inductor Lc1 .

One end of the second converter switch Qc12 is connected to the other end of the first converter switch Qc11 and one end of the converter inductor Lc1. The other end of the second converter switch Qc21 may be connected to the other end of the link capacitor Cl1.

One end of the converter inductor Lc1 may be connected to the other end of the first converter switch Qc11 and one end of the second converter switch Qc12 and the other end of the converter inductor Lc1 may be connected to one end of the load.

Hereinafter, operations in the respective modes of the wireless power transmission / reception apparatus 101 will be described with reference to Figs. 11 to 16. Fig.

11 and 12 are reference circuit diagrams for explaining a power receiving operation using the first resonant circuits C11 and L11 of the wireless power transmitting / receiving apparatus shown in FIG.

The first resonant circuits C11 and L11 may be magnetically coupled to the resonant circuit of the power transmitting device to receive the AC input.

11, the first switch Q11 of the first bridge circuits Q11 and Q12 and the fourth switch Q14 of the second bridge circuits Q13 and Q14 are turned on , Charge can be stored in the link capacitor Cl.

12, the second switch Q12 of the first bridge circuits Q11 and Q12 and the third switch Q13 of the second bridge circuits Q13 and Q14 are turned on, The charge can be stored in the link capacitor Cl1.

That is, the first bridge circuits (Q1, Q2) and the second bridge circuits (Q3, Q4) can operate as a rectifying circuit.

It is understood from the above description that the bi-directional converter 131 reduces the voltage of the link capacitor Cl1 and supplies it to the load in accordance with the switching control for the first converter switch Qc11.

13 is a reference circuit diagram for explaining a power transmission operation using the first resonant circuit of the wireless power transmitting / receiving apparatus shown in Fig.

The first resonant circuits C11 and L11 may be magnetically coupled to the resonant circuit of the power receiving device to provide AC power.

For this purpose, the bidirectional converter 131 can boost the power of the load and provide it to the link capacitor Cl1. For example, by switching control (for example, pulse width modulation control) of the bidirectional converter 131 to the second converter switch Qc12, the power of the load is charged and discharged to the converter inductor Lc .

The bridge circuit unit 121 may generate an AC power source using the DC power stored in the link capacitor Cl1 and provide it to the first resonance circuits C11 and L11.

For example, the bridge circuit unit 120 may generate AC power according to an alternate switching operation of the first switch Q11 and the fourth switch Q14. In this example, the third switch Q13 may be in the ON state.

In addition, the bridge circuit section 120 may operate in various ways.

For example, the fourth switch Q14 may be set to the ON state to ground, and the alternating current power may be generated in accordance with the alternate switching operation of the first switch Q11 and the second switch Q12.

For example, the second switch Q12 may be set to the ON state to ground, and the AC power may be generated in accordance with the alternate switching operation of the third switch Q13 and the fourth switch Q14.

Thus, in the power transmission mode, bidirectional converter 131 operates as a boost converter and bridge circuit 121 operates as an inverter.

Figs. 14 and 15 are reference circuit diagrams illustrating a power receiving operation using the second resonant circuit of the wireless power transmitting / receiving device shown in Fig. 10. Fig.

The second resonant circuits C12 and L12 may be magnetically coupled to the resonant circuit of the power transmitting device to receive the AC input.

14, the third switch Q13 of the second bridge circuits Q13 and Q14 and the sixth switch Q16 of the third bridge circuits Q15 and Q16 are turned on , Charge can be stored in the link capacitor Cl1.

15, the fourth switch Q14 of the second bridge circuits Q13 and Q14 and the fifth switch Q15 of the third bridge circuits Q15 and Q16 are turned on, The charge can be stored in the link capacitor Cl1.

That is, as shown in Figs. 14 and 5, the second bridge circuits Q13 and Q14 and the third bridge circuits Q15 and Q61 can operate as a rectifying circuit.

As described above, the bidirectional converter 131 can vary the voltage of the link capacitor Cl1 according to the switching control for the first converter switch Qc11 and provide it to the load.

16 is a reference circuit diagram for explaining a power transmission operation using the second resonant circuit of the wireless power transmitting / receiving device shown in Fig.

The second resonant circuits (C12, L12) can be magnetically coupled to the resonant circuit of the power receiving device to provide AC power.

The power of the load is stepped up by the charging and discharging of the converter inductor Lc by the switching control of the bidirectional converter 131 to the second converter switch Qc12 for example by the pulse width modulation control, Cl1).

The bridge circuit unit 121 may generate an AC power source using the DC power stored in the link capacitor Cl1 and provide it to the second resonant circuits C12 and L12.

For example, the bridge circuit unit 121 may generate an AC power according to the alternate switching operation of the fifth switch Q5 and the eighth switch Q18. In this example, the seventh switch Q17 may be in the ON state.

In addition, the bridge circuit section 120 may operate in various ways.

For example, the sixth switch Q16 may be set to the ON state to ground, and the AC power supply may be generated according to the alternate switching operation of the seventh switch Q17 and the eighth switch Q18.

For example, the eighth switch Q18 may be set to the ON state to be grounded, and the AC power supply may be generated according to the alternate switching operation of the fifth switch Q15 and the sixth switch Q16.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

10: Electronic device
20: Wireless power transmitter
100: wireless power transmitter / receiver
110: Resonator
120: bridge circuit part
130: Bi-directional converter

Claims (15)

A resonator magnetically coupled to the wireless power transmission device or the wireless power reception device;
A bridge circuit part connected to the resonator and operating as a rectifier in a power reception mode and as an inverter in a power transmission mode; And
A bidirectional converter that is connected to the bridge circuit and operates in a reduced voltage in the power receiving mode and in a power transmitting mode;
Gt; transmitting / receiving < / RTI >
The resonator according to claim 1, wherein the resonator
A first resonant circuit having a first resonant frequency; And
A second resonant circuit having a second resonant frequency lower than the first resonant frequency; Lt; / RTI >
Wherein the first resonant circuit and the second resonant circuit have one common end.
3. The semiconductor device according to claim 2, wherein the bridge circuit portion
A first bridge circuit, a second bridge circuit and a third bridge circuit,
When the first resonant circuit operates, the first bridge circuit and the second bridge circuit operate as a rectifier or an inverter,
And the second bridge circuit and the third bridge circuit operate as a rectifier or an inverter when the second resonant circuit operates.
3. The semiconductor device according to claim 2, wherein the bridge circuit portion
A first bridge circuit, a second bridge circuit and a third bridge circuit,
Wherein one end of the first resonant circuit is connected to the first bridge circuit, the common end to a second bridge circuit, and the other end of the second resonant circuit is connected to the third bridge circuit.
The method of claim 1, wherein the bidirectional converter
Wherein the power receiving mode provides a reduced voltage to the load through the bridge circuit unit and provides the load to the bridge circuit unit by boosting the second voltage provided in the load in the power transmission mode.
The apparatus of claim 1, wherein the wireless power transceiver
A link capacitor connected to the bridge circuit unit and the bidirectional converter;
Further comprising:
The link capacitor
And provides the stored charge to the bidirectional converter in the power receiving mode and provides the stored charge to the bridge circuit in the power transmitting mode.
7. The method of claim 6, wherein the bidirectional converter
A first converter switch having one end connected to one end of the link capacitor;
A second converter switch having one end connected to the other end of the first converter switch and the other end connected to the other end of the link capacitor; And
An inductor whose one end is connected to the other end of the first converter switch and one end of the second converter switch;
Gt; transmitting / receiving < / RTI >
8. The method of claim 7,
In the power receiving mode,
Wherein the first converter switch performs a switching operation in accordance with the pulse width change control,
And the second converter switch is not switched-controlled.
8. The method of claim 7,
In the power transmission mode,
The first converter switch is not switched,
And the second converter switch performs switching operation according to pulse width modulation control.
A first resonant circuit having a first resonant frequency;
A second resonant circuit having a second resonant frequency lower than the first resonant frequency;
A bridge circuit part including a plurality of bridge circuits, at least a part of the plurality of bridge circuits being connected to the first resonant circuit, and a remaining part of the plurality of bridge circuits being connected to the second resonant circuit; And
A bidirectional converter connected to the bridge circuit unit for reducing a first voltage provided through the bridge circuit unit in a power reception mode and for boosting a second voltage provided in a load in a power transmission mode;
Gt; transmitting / receiving < / RTI >
11. The apparatus of claim 10, wherein the bridge circuit portion
And operates as a rectifier in the power receiving mode and as an inverter in the power transmitting mode.
11. The apparatus of claim 10, wherein the wireless power transceiver
A link capacitor connected to the bridge circuit unit and the bidirectional converter;
Further comprising:
The link capacitor
And provides the stored charge to the bidirectional converter in the power receiving mode and provides the stored charge to the bridge circuit in the power transmitting mode.
13. The method of claim 12, wherein the bidirectional converter
A first converter switch having one end connected to one end of the link capacitor;
A second converter switch having one end connected to the other end of the first converter switch and the other end connected to the other end of the link capacitor; And
An inductor whose one end is connected to the other end of the first converter switch and one end of the second converter switch;
Gt; transmitting / receiving < / RTI >
14. The method of claim 13,
In the power receiving mode,
Wherein the first converter switch performs a switching operation in accordance with the pulse width change control,
And the second converter switch is not switched-controlled.
14. The method of claim 13,
In the power transmission mode,
The first converter switch is not switched,
And the second converter switch performs switching operation according to pulse width modulation control.

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