KR102297354B1 - Wireless power transmission systme which enables to transmit and receive induced power signal and resonance power signal - Google Patents

Abstract

The present invention provides a hybrid wireless power transmission system comprising a hybrid wireless power transmitter capable of oscillating an inductive power signal and a resonance power signal, and a wireless power receiver capable of receiving a power signal from the hybrid wireless power transmitter. , The hybrid wireless power transmitter includes: a transmitting coil configured to oscillate the inductive power signal; a transmit antenna configured to oscillate the resonant power signal; a first variable capacitor block connected to the transmitting coil and the transmitting antenna; When the wireless power receiver is an inductive power receiver, the transmitting coil is operated and the first variable capacitor block is controlled to achieve inductive main impedance matching, and when the wireless power receiver is a magnetic resonance receiver , a transmission control unit that operates the transmission antenna and controls the first variable capacitor block to achieve resonance main impedance matching, wherein the wireless power receiver receives at least one of a resonance power signal and the induction power signal a receiving block capable of receiving a second variable capacitor block connected to the receiving block; and a reception control unit configured to control the second variable capacitor block to perform auxiliary impedance matching with the wireless transmission device.

Description

WIRELESS POWER TRANSMISSION SYSTME WHICH ENABLES TO TRANSMIT AND RECEIVE INDUCED POWER SIGNAL AND RESONANCE POWER SIGNAL

The present invention relates to a wireless power transmission system capable of transmitting and receiving an inductive power signal and a resonant power signal.

With the development of wireless communication technology, it is becoming a ubiquitous information environment where anyone can exchange any desired information anytime, anywhere. However, most communication information devices still rely on batteries, and the use of communication information devices is limited by being supplied with power by a wired power cord.

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

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

Here, the radio wave reception type has the advantage of being able to transmit power over a long distance by radiating radio waves into the air through an antenna, but there is a limit to the efficiency of power transmission because the radiation loss consumed in the air is very large.

In addition, the magnetic induction method uses a transmission coil as a transmitter and a secondary coil as a receiver and uses magnetic energy coupling by the primary and secondary coils, and has the advantage of having high power transmission efficiency, but power transmission For this purpose, the primary and secondary coils must be adjacent to each other at a short distance of several millimeters, and there is a disadvantage in that the efficiency of power transmission rapidly changes according to the alignment of the primary and secondary coils.

Therefore, recently, a magnetic resonance method similar to the magnetic induction method but in which energy is concentrated at a specific resonant frequency by the coil-type inductor (L) and the capacitor (C) to transmit power in the form of magnetic energy has been developed. This magnetic resonance method has the advantage of being able to transmit relatively large energy up to several meters, but requires a high resonance characteristic (high quality factor). That is, the magnetic resonance method has a disadvantage in that the efficiency changes rapidly depending on whether the impedance matches or the resonance frequency matches.

In addition, in achieving such impedance matching, a large number of capacitors are required, and accordingly, the number of parts increases, and there is a problem in that a control program for this is complicated.

In the present invention, in impedance matching of a wireless power transmission system, by giving a part of the role to a wireless power receiving device, the control efficiency can be increased and the configuration can be simplified. To provide a power transmission system.

Including a hybrid wireless power transmitter capable of oscillating an inductive power signal and a resonance power signal, and a wireless power receiver capable of receiving a power signal from the hybrid wireless power transmitter, which have been devised to solve the above problems A hybrid wireless power transmission system comprising: a transmission coil configured to oscillate the inductive power signal; a transmit antenna configured to oscillate the resonant power signal; a first variable capacitor block connected to the transmitting coil and the transmitting antenna; and when the wireless power receiver is an inductive power receiver, the transmitting coil is operated and the first variable capacitor block is controlled to achieve inductive main impedance matching, and the wireless power receiver is a magnetic resonance receiver. case, including a transmission control unit that operates the transmission antenna and controls the first variable capacitor block to achieve resonance main impedance matching, wherein the wireless power receiver receives at least one of the resonance power signal and the induction power signal a receiving block capable of receiving one; a second variable capacitor block connected to the receiving block; and a reception control unit configured to control the second variable capacitor block to perform auxiliary impedance matching with the wireless transmission device.

Here, the first variable capacitor block may include a first main capacitor block connected to the transmission coil; a second main capacitor block connected to the transmit antenna; and a main switching unit configured to select one of the first main capacitor block and the second main capacitor block under the control of the transmission control unit.

Here, the first main capacitor block includes a plurality of main induction capacitors, the main induction capacitors are connected in series and parallel to each other, and an inductive transfer switch disposed between the main induction capacitors, and the transmission control unit includes the induction The inductive main impedance matching may be achieved by turning the transfer switch on/off.

Here, the second main capacitor block includes a plurality of main resonance capacitors, the main resonance capacitors are connected in series and parallel to each other, and a resonance transfer switch disposed between the main resonance capacitors, and the transmission control unit, the resonance The transmission switch may be turned on and off to achieve the resonance main impedance matching.

Here, the receiving block may include: a receiving coil for receiving the inductive power signal; and a receiving antenna for receiving the resonance power signal.

Here, the second variable capacitor block may include: a first auxiliary capacitor block connected to the receiving coil; a second auxiliary capacitor block connected to the receiving antenna; and an auxiliary switching unit configured to select one of the first auxiliary capacitor block and the second auxiliary capacitor block under the control of the reception control unit.

Here, the first auxiliary capacitor block includes a plurality of auxiliary induction capacitors, the auxiliary induction capacitors are connected in series and parallel to each other, and an inductive reception switch disposed between the auxiliary induction capacitors, and the reception control unit includes: The receiving switch can be turned on and off to achieve inductive auxiliary impedance matching.

Here, the second auxiliary capacitor block includes a plurality of auxiliary resonance capacitors, the auxiliary resonance capacitors are connected in series and parallel to each other, and a resonance receiving switch disposed between the auxiliary resonance capacitors, the reception control unit, the resonance Resonant auxiliary impedance matching can be achieved by turning the receiving switch on and off.

In another embodiment of the present invention, a wireless power transmission system including a wireless power transmission apparatus and a wireless power reception apparatus, the wireless power transmission apparatus comprising: a transmission block for transmitting a wireless power signal; a first variable capacitor block connected to the transport block; and a transmission control unit controlling the first variable capacitor block for main impedance matching when the wireless power receiving device is placed in a charging position, wherein the wireless power receiving device includes: a receiving block for receiving the wireless power signal; a second variable capacitor block connected to the receiving block; and a reception control unit controlling the second variable capacitor block to match the auxiliary impedance with the transport block.

Here, the first variable capacitor block includes a plurality of main capacitors, the main capacitors are connected in series and parallel to each other, and a transfer switch disposed between the main capacitors, and the transfer control unit turns the transfer switch on/off. to achieve the main impedance matching.

Here, the second variable capacitor block includes a plurality of auxiliary capacitors, the auxiliary capacitors are connected in series and parallel to each other, and a reception switch disposed between the auxiliary capacitors, and the reception control unit turns the reception switch on/off. to achieve the auxiliary impedance matching.

According to an embodiment of the present invention having the above-described configuration, in impedance matching, the wireless power transmitter and the wireless power receiver share their roles, so that the control efficiency for impedance matching can be increased.

In addition, by simply combining a change in capacitance for impedance matching with a series-parallel circuit and a switch, it is possible to set various capacitance values with fewer capacitors and switches.

1 is a block diagram illustrating an electronic configuration of a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention;
2 is a block diagram for explaining the electronic configuration of a hybrid receiving device in a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention.
3 is a block diagram illustrating an electronic configuration of a first variable capacitor block of a hybrid wireless power transmission device of a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention.
4 is a block diagram for explaining an electronic configuration of a second variable capacitance block of a hybrid receiving device of a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention.
5 is a circuit diagram of a variable capacitor block of a wireless power transmission system capable of transmitting and receiving an inductive power signal and a resonance power signal according to an embodiment of the present invention.

Hereinafter, a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to the present invention will be described in detail with reference to the drawings.

1 is a block diagram illustrating an electronic configuration of a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention. As shown in FIG. 1 , the wireless power system according to the present invention may include a wireless power transmitter 100 and a wireless power receiver 200 .

The hybrid wireless power transmitter 100 according to the present invention may include a transmitting coil 110 , a transmitting antenna 120 , a first variable capacitor block 130 , and a transmission control unit 140 , and wireless power reception The device 200 may be an inductive power receiver 201 , a magnetic resonance receiver 202 , and a hybrid receiver 203 .

More specifically, the transmitting coil 110 is for oscillating a wireless power signal by electromagnetic induction to oscillate an induced power signal, and the transmitting antenna 120 is for oscillating a resonance power signal that is a wireless power signal by magnetic resonance. will be.

The first variable capacitor block 130 connected to the transmitting coil 110 and the transmitting antenna 120 is the wireless power receiving device 200 is a charging position (in the case of an induction power receiving device), or a charging distance (magnetic In the case of a resonance receiving device), it is a component for inductive main impedance matching or resonance main impedance matching for impedance matching with them.

When the inductive power receiving device is placed in the charging position, the transmission control unit 140 operates the transmitting coil 110 and controls the first variable capacitor block 130 to match the inductive main impedance, When the magnetic resonance receiving device is located at the charging distance, it functions to operate the transmitting antenna 120 and control the first variable capacitor block 130 to achieve resonance main impedance matching.

Here, the main impedance matching is a meaning corresponding to the auxiliary impedance matching performed in the wireless power receiver 200 , and means that a relatively large capacitance change is made in the impedance matching. In addition, the auxiliary impedance matching refers to a relatively small change in capacitance when the second variable capacitor block 230 of the wireless power receiver 200 performs impedance matching with the transmission block A of the wireless power transmitter 100 . it means.

By configuring the wireless power transmitter 100 as described above, when the wireless power receiver 200 is the inductive power receiver 201, the inductive main impedance matching is performed in the first variable capacitor block 130, When the wireless power receiver 200 is the magnetic resonance receiver 202 , the resonance main impedance matching is performed in the first variable capacitor block 130 .

According to an embodiment of the present invention having the above configuration, the receiving device is not only capable of charging whether it is a resonance type or an induction type. Since the transmitting apparatus and the receiving apparatus perform the impedance matching operation with the receiving apparatus together, the burden of the impedance matching operation on the transmitting apparatus side can be reduced.

Hereinafter, an electronic configuration of a hybrid reception device in a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention will be described with reference to FIG. 2 .

2 is a block diagram for explaining an electronic configuration of a hybrid reception device in a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention. As shown in FIG. 2 , the hybrid reception device 203 may include a reception block B, a second variable capacitor block 230 , and a reception control unit 240 .

The reception block B may include a reception coil 210 and a reception antenna 220 . The receiving coil 210 is a component for generating AC power by electromagnetic induction by receiving an induction power signal that is a low frequency signal, and the receiving antenna 220 receives a resonance power signal that is a high frequency signal to receive an AC power signal. It is a component for

The second variable capacitor block 230 is a component for auxiliary impedance matching. That is, when the transmission coil 110 or the transmission antenna 120 and the reception coil 210 or the reception antenna 220 of the transmission block A perform impedance matching, capacitance is changed for auxiliary impedance matching. Under the control of the reception control unit 240 , the capacitance value of the second variable capacitor block 230 is changed to an auxiliary, that is, a small size (meaning a small size compared to the first variable capacitor block 130) to match the impedance. make this happen

Herein, the hybrid receiver 203 will be mainly described, but it should be understood that the present invention is not limited thereto, and may also be used in an inductive power receiver and a magnetic resonance receiver. That is, in FIG. 2 , there are both the receiving coil 210 and the receiving antenna 220 , but when one of them is removed, it corresponds to the inductive power receiving device 201 or the magnetic resonance receiving device 202 , and even in this case For impedance matching, the capacitance of the second variable capacitor block 230 is changed to a small value.

Hereinafter, the electronic configuration of the first variable capacitor block 130 of the hybrid wireless power transmitter 100 and the second variable capacitor block 230 of the wireless power receiver 200 will be described with reference to FIGS. 3 and 4 . Please refer to and explain.

3 is a block diagram for explaining the electronic configuration of a first variable capacitor block of a hybrid wireless power transmission device of a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention; 4 is a block diagram illustrating an electronic configuration of a second variable capacitance block among hybrid reception devices of a wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention.

First, referring to FIG. 3 , the first variable capacitor block 130 may include a first main capacitor block 131 , a second main capacitor block 133 , and a main switching unit 135 . have.

The first main capacitor block 131 is connected to the transmitting coil 110, so that the capacitance value is transmitted to the transmitting control unit 140 to achieve inductive main impedance matching, which is impedance matching between the transmitting coil 110 and the receiving coil 210. is changed under the control of

The second main capacitor block 133 is connected to the transmitting antenna 120 so that a capacitance value (a relatively large value) is transmitted to achieve resonance main impedance matching, which is impedance matching between the transmitting antenna 120 and the receiving antenna 220 . It is changed under the control of the controller 140 .

The main switching unit 135, the transmission control unit 140 transmits an external object detection signal through the transmission block (A), detects a signal from the wireless power receiving device 200 corresponding thereto, the wireless power receiving device When the type of is checked, it functions to select one of the first main capacitor block 131 and the second main capacitor block 133 according to the type of the receiving device. That is, the transmission control unit 140 determines whether the external object is the induction power receiver 201 or the magnetic resonance receiver 202 using the external object detection signal oscillated in the transport block A, and, accordingly, assists The switching unit 235 is operated to select a suitable main capacitor block to transmit a wireless power signal.

And, the capacitance value of the selected main capacitor block is changed based on the ID signal of the receiving device for main impedance matching.

Meanwhile, as shown in FIG. 4 , the second variable capacitor block 230 of the hybrid receiver 203 includes a first auxiliary capacitor block 231 , a second auxiliary capacitor block 233 , and an auxiliary switching unit. (235).

The first auxiliary capacitor block 231 is connected to the receiving coil 210 so that the capacitance value is adjusted to the receiving control unit 240 to achieve inductive auxiliary impedance matching, which is impedance matching between the transmitting coil 110 and the receiving coil 210 . is changed under the control of

The second auxiliary capacitor block 233 is connected to the receiving antenna 220 so as to achieve a resonance auxiliary impedance matching, which is impedance matching between the transmitting antenna 120 and the receiving antenna 220, a capacitance value (a relatively small value) It is changed under the control of this reception control unit 240 .

The auxiliary switching unit 235, when the reception control unit 240 detects an external object detection signal through the transmission block (A) and the type of the wireless power transmission device 100 is checked accordingly, the transmission device 100 It functions to select one of the first auxiliary capacitor block 231 and the second auxiliary capacitor block 233 according to the type of That is, the reception control unit 240 determines whether the transmission device 100 is an induction power transmission device or a magnetic resonance transmission device using the external object detection signal oscillated in the transmission block A, and, accordingly, the auxiliary switching unit ( 235) to select a suitable auxiliary capacitor block to achieve impedance matching, thereby receiving an optimal wireless power signal.

Hereinafter, the circuit configuration of the variable capacitor block will be described with reference to FIG. 5 . The variable capacitor block described in FIG. 5 is an example that can be applied to both the first and second main capacitor blocks and the first and second auxiliary capacitor blocks described with reference to FIGS. 1 to 4 . In the claims, depending on where the variable capacitor block of FIG. 5 is used, the capacitor is named "main capacitor, main induction capacitor, main resonance capacitor, auxiliary capacitor, auxiliary induction capacitor, auxiliary resonance capacitor", and the switch is "transfer switch" , inductive transmit switch, resonant transmit switch, receive switch, inductive receive switch, resonant receive switch”.

5 is a circuit diagram of a variable capacitor block of a wireless power transmission system capable of transmitting and receiving an inductive power signal and a resonance power signal according to an embodiment of the present invention. As shown in FIG. 5, the variable capacitor block of the wireless power transmission system capable of transmitting and receiving an induction power signal and a resonance power signal according to an embodiment of the present invention includes a plurality of capacitors C1 to C4 connected in series and parallel; , the switches S1 and S2 disposed between the capacitors. By configuring as described above, it is possible to combine capacitances of various values even with a smaller number of capacitors. As a result, the number of parts is reduced, thereby contributing to weight reduction and thinning of the product.

According to an embodiment of the present invention having the above-described configuration, in impedance matching, the wireless power transmitter and the wireless power receiver share their roles, so that the control efficiency for impedance matching can be increased.

In addition, by simply combining a change in capacitance for impedance matching with a series-parallel circuit and a switch, it is possible to set various capacitance values with fewer capacitors and switches.

100: wireless power transmission device (hybrid type)
110: transmission coil
120: transmit antenna
A: transport block
130: first variable capacitor block
131: first main capacitor block
133: second main capacitor block
135: main switching unit
140: transmission control unit
200: wireless power receiver
201: inductive power receiving device
202: magnetic resonance receiving device
203: hybrid receiving device
210: receiving coil
220: receiving antenna
230: second variable capacitor block
231: first auxiliary capacitor block
233: second auxiliary capacitor block
235: auxiliary switching unit
240: reception control unit
C1, C2, C3, C4: Capacitors
S1, S2: switch

Claims (10)

A hybrid wireless power transmission system comprising: a hybrid wireless power transmitter capable of oscillating an inductive power signal and a resonance power signal; and a wireless power receiver capable of receiving a power signal from the hybrid wireless power transmitter;
The hybrid wireless power transmission device,
a transmitting coil configured to oscillate the inductive power signal;
a transmit antenna configured to oscillate the resonant power signal;
a first variable capacitor block connected to the transmitting coil and the transmitting antenna;
and a transmission control unit for operating at least one of the transmitting coil and the transmitting antenna and controlling the first variable capacitor block to achieve main impedance matching,
The wireless power receiving device,
a receiving block capable of receiving at least one of a resonant power signal and the inductive power signal;
a second variable capacitor block connected to the receiving block; and
a receiving control unit for controlling the second variable capacitor block to perform auxiliary impedance matching with the hybrid wireless power transmitter;
The first variable capacitor block,
a first main capacitor block connected to the transmission coil;
a second main capacitor block connected to the transmit antenna; and
A hybrid wireless power transmission system comprising a main switching unit configured to select one of the first main capacitor block and the second main capacitor block under the control of the transmission control unit. The method of claim 1,
The first main capacitor block,
a plurality of main inductive capacitors, wherein the plurality of main inductive capacitors are connected in series-parallel to each other; and
an inductive transfer switch connected between the main inductive capacitor;
The transmission control unit, the hybrid wireless power transmission system to perform the main impedance matching by turning the inductive transmission switch on and off. The method of claim 1,
The second main capacitor block,
a plurality of main resonance capacitors, wherein the plurality of main resonance capacitors are connected in series-parallel to each other; and
a resonance transfer switch connected between the main resonance capacitor;
The transmission control unit, by turning the resonance transmission switch on and off to perform the main impedance matching, a hybrid wireless power transmission system. The method of claim 1,
The receiving block is
a receiving coil for receiving the inductive power signal; and
and a receive antenna for receiving the resonant power signal. 5. The method of claim 4,
The second variable capacitor block,
a first auxiliary capacitor block connected to the receiving coil;
a second auxiliary capacitor block connected to the receiving antenna; and
A hybrid wireless power transmission system comprising an auxiliary switching unit configured to select one of the first auxiliary capacitor block and the second auxiliary capacitor block under the control of the reception control unit. 6. The method of claim 5,
The first auxiliary capacitor block,
a plurality of auxiliary inductive capacitors, wherein the plurality of auxiliary inductive capacitors are connected in series and parallel with each other; and
an inductive receiving switch connected between the auxiliary inductive capacitors;
The reception control unit, the hybrid wireless power transmission system that performs inductive auxiliary impedance matching by turning the inductive reception switch on and off. 6. The method of claim 5,
The second auxiliary capacitor block,
a plurality of auxiliary resonant capacitors, wherein the plurality of auxiliary resonant capacitors are connected in series-parallel to each other; and
A resonance receiving switch connected between the auxiliary resonance capacitor,
The reception control unit, by turning the resonance reception switch on and off to perform resonance auxiliary impedance matching, a hybrid wireless power transmission system. A wireless power transmission system comprising a wireless power transmission device and a wireless power reception device, the wireless power transmission system comprising:
The wireless power transmission device,
a transport block for transmitting a wireless power signal;
a first variable capacitor block connected to the transport block; and
a transmission control unit for controlling the first variable capacitor block for main impedance matching;
The wireless power receiving device,
a receiving block for receiving the wireless power signal;
a second variable capacitor block connected to the receiving block; and
a receiving control unit for controlling the second variable capacitor block for auxiliary impedance matching with the transport block;
The first variable capacitor block,
a first main capacitor block connected to the transport block;
a second main capacitor block connected to the transport block; and
A wireless power transmission system comprising a main switching unit configured to select one of the first main capacitor block and the second main capacitor block under the control of the transmission control unit. 9. The method of claim 8,
at least one of the first variable capacitor block and the second variable capacitor block,
a plurality of main capacitors, the plurality of main capacitors being connected in series-parallel to each other; and
a transfer switch connected between the main capacitor;
The transmission control unit, to perform the main impedance matching by turning the transmission switch on and off, a wireless power transmission system. 9. The method of claim 8,
The second variable capacitor block,
a plurality of auxiliary capacitors, wherein the plurality of auxiliary capacitors are connected in series-parallel to each other; and
a receiving switch connected between the auxiliary capacitors;
The reception control unit, by turning the reception switch on and off to perform the auxiliary impedance matching, a wireless power transmission system.

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