KR20230051469A - Hybrid wireless power transmission device which enables to transmit resonance power signal and induced power signal simultaneously and hybrid wireless power transmission system including the same - Google Patents

Abstract

The present invention relates to a hybrid wireless power transmission device capable of transmitting a resonance power signal and an induced power signal, which may maximize the transmission efficiency of resonance charging and induced charging. The hybrid wireless power transmission device capable of transmitting a resonance power signal and an induced power signal comprises: an induced power transmission unit which includes a transmission coil and a first variable capacitor block connected to the transmission coil, and is configured to transmit an induced-type wireless power signal; a magnetic resonance power transmission unit which includes a transmission antenna and a second variable capacitor block connected to the transmission antenna, and is configured to transmit a magnetic resonance-type wireless power signal; and a transmission control unit which controls the induced power transmission unit and the magnetic resonance power transmission unit to enable an induced power signal and a magnetic resonance power signal to oscillate at the same time while adjusting the first variable capacitor block and the second variable capacitor block when an induced power reception location is located at a charging location and when a magnetic resonance reception device is located within a charging distance.

Description

A hybrid wireless power transmission device capable of transmitting a resonant power signal and an inductive power signal, and a hybrid wireless power transmission system including the same THE SAME}

The present invention relates to a hybrid wireless power transmission device capable of transmitting a resonance power signal and an inductive power signal, and a hybrid wireless power transmission system including the same.

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

Therefore, the wireless information network environment cannot be truly free 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 typical.

Here, the radio wave reception method has the advantage of being able to transmit power over a long distance by radiating radio waves into the air through an antenna, but the efficiency of power transmission is limited 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 has the advantage of high power transmission efficiency as a technology using magnetic energy coupling by the primary and secondary coils. For this, the primary and secondary coils must be adjacent to each other at a short distance of several millimeters, and the efficiency of power transmission rapidly changes depending on 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 resonance frequency by a coil-type inductor (L) and a 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 quality factor. That is, the magnetic resonance method has a disadvantage in that the efficiency rapidly changes depending on whether or not the impedance matches and whether the resonant frequencies match.

In particular, when charging by magnetic resonance and charging by induction are performed simultaneously, there is a problem in that charging efficiency is not good due to magnetic interference between the two.

The present invention is a hybrid wireless power transmission device capable of transmitting a resonance power signal and an induction power signal, which can simultaneously transmit an inductive power signal and a resonance power signal to each of an induction power receiver and a magnetic resonance receiver, thereby enabling simultaneous charging. And to provide a hybrid wireless power transmission system including the same.

A hybrid wireless power transmitter capable of transmitting a resonance power signal and an inductive power signal, which is an embodiment of the present invention for solving the above problems, includes an inductive power transmitter configured to transmit the inductive power signal, the inductive power transmitter The unit includes a transmission coil and a first variable capacitor block connected to the transmission coil; a magnetic resonance power transmission unit configured to transmit the resonance power signal, the magnetic resonance power transmission unit including an antenna and a second variable capacitor block connected to the transmission antenna; and when the inductive power receiver is located at the charging position and the magnetic resonance receiver is located at the charging distance, the inductive power signal and the resonance power signal are obtained while adjusting the first variable capacitor block and the second variable capacitor block. A transmission controller controlling the inductive power transmitter and the magnetic resonance power transmitter to oscillate at the same time may be included.

Here, each of the first variable capacitor block and the second variable capacitor block may include a plurality of capacitors connected in series and parallel; and a switching unit disposed between the capacitors.

Here, the magnetic resonance transmitter of the hybrid wireless power transmitter further includes a short-range communication unit for receiving resonance power state information from the resonance receiver, and the transmission control unit transmits the resonance power state information and the transmission coil. Impedance matching may be attempted by adjusting capacitances of the first and second variable capacitor blocks based on the induced power state information received through the circuit.

Here, the transmission control unit randomly adjusts the capacitance of the first and second variable capacitor blocks to attempt impedance matching, a hybrid wireless power transmission device capable of transmitting a resonance power signal and an induction power signal.

Here, the transmission controller may first perform impedance matching of the second variable capacitor block and then attempt impedance matching of the first variable capacitor block.

Meanwhile, a hybrid wireless power transmission system, which is another embodiment of the present invention, includes the aforementioned hybrid wireless power transmission device; An inductive power receiving device including a receiving coil, a third variable capacitor block connected to the receiving coil, and an inductive receiving control unit adjusting a capacitance of the third variable capacitor block; and a magnetic resonance receiving device including a receiving antenna, a fourth variable capacitor block connected to the receiving antenna, and a resonance receiving control unit adjusting a capacitance of the fourth variable capacitor block; can include

Here, the inductive reception controller may finely adjust the capacitance of the third variable capacitor block.

Here, the resonance reception controller may finely adjust the capacitance of the fourth variable capacitor block.

According to one embodiment of the present invention having the above configuration, the hybrid wireless power transmitter simultaneously transmits a wireless power signal to an inductive power receiver in a charging position and a magnetic resonance receiver in a charging distance so that charging is performed simultaneously. can do.

In addition, transmission efficiency of resonance charging and inductive charging can be maximized by correcting an interference phenomenon that may occur when the transmission coil and the transmission antenna are simultaneously operated by changing the capacitance.

1 is a diagram for explaining a case in which resonant charging and inductive charging are simultaneously performed in a hybrid wireless power transmission device according to an embodiment of the present invention.
2 is a block diagram illustrating an electronic configuration of a wireless power transmission system including a hybrid wireless power transmission device according to an embodiment of the present invention.
3 is a block diagram illustrating an electronic configuration of an inductive power transmitter in a hybrid wireless power transmitter according to an embodiment of the present invention.
4 is a block diagram illustrating an electronic configuration of a magnetic resonance transmission unit in a hybrid wireless power transmission device according to an embodiment of the present invention.
5 is a block diagram illustrating an electronic configuration of an inductive power receiving device in the wireless power transmission system of FIG. 2;
6 is a block diagram illustrating an electronic configuration of a resonance power receiving device in the wireless power transmission system of FIG. 2;
7 is a circuit diagram of first to fourth variable capacitor blocks included in a wireless power transmission system including a hybrid wireless power transmission device according to an embodiment of the present invention.

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

1 is a diagram for explaining a case in which resonant charging and inductive charging are simultaneously performed in a hybrid wireless power transmitter 100, which is an embodiment of the present invention. As shown in FIG. 1, the hybrid wireless power transmitter 100, which is an embodiment of the present invention, has a rectangular panel shape as a whole, and a charging position A is formed on its main surface. When the inductive power receiver 200 is placed at the charging position A, an inductive power signal is transmitted and the inductive power receiver 200 is charged. In addition, when the magnetic resonance receiver 300 is positioned within the charging distance B, a resonance power signal is transmitted and the magnetic resonance receiver 300 is charged.

However, in the case of charging two different wireless power receivers 200 and 300 in this way, a magnetic interference phenomenon occurs between the transmission antenna 121 and the transmission coil 111, thereby making it difficult to charge both of them. do.

Accordingly, in the present invention, impedance matching is adjusted to correct self-interference. Hereinafter, the impedance matching adjustment will be described in detail with reference to FIGS. 2 to 7 .

2 is a block diagram illustrating an electronic configuration of a wireless power transmission system including a hybrid wireless power transmission device according to an embodiment of the present invention. As shown in FIG. 2, a wireless power transmission system according to an embodiment of the present invention may include a hybrid transmission device 100 and wireless power reception devices 200 and 300.

The hybrid wireless power transmitter 100 includes an inductive power transmitter 110 that outputs an inductive power signal, a magnetic resonance transmitter 120 capable of transmitting a resonance power signal, and a transmission control unit 130 that controls them. can include

Each of the inductive power transmitter 110 and the magnetic resonance transmitter 120 may include a first variable capacitor block 113 and a second variable capacitor block 123 for impedance matching.

When the induction power receiving position 200 is located at the charging position and the magnetic resonance receiving device 300 is located at the charging distance B, the transmission control unit 130 transmits the first variable capacitor block 113 and the While adjusting the second variable capacitor block 123, the inductive power transmitter 120 and the magnetic resonance transmitter 130 may be controlled to simultaneously oscillate the induced power signal and the resonance power signal. At this time, the transmission control unit 130 may attempt impedance matching by randomly adjusting the capacitances of the first and second variable capacitor blocks 113 and 123, and the second variable capacitor for which impedance matching is more important. After the impedance matching of the block 123 is first performed, the impedance matching of the first variable capacitor block 113 may be attempted.

Examples of the wireless power receiver include an inductive power receiver that receives an inductive power signal and a magnetic resonance receiver that receives a resonance power signal. Their configuration will be described later.

3 is a block diagram illustrating an electronic configuration of an inductive power transmitter in a hybrid wireless power transmitter according to an embodiment of the present invention. As shown in FIG. 3 , the inductive power transmitter 110 may include a transmission coil 111 and a first variable capacitor block 113 . The transmitting coil 111 is a component for transmitting an induction power signal, and the first variable capacitor block 113 is controlled by the transmission controller 130 to transmit the transmitting coil 111 and the receiving coil 210 of the wireless power receiving device. ) is a component whose capacitance value is changed for impedance matching with Here, the first variable capacitor block 113 is changed to a relatively large value and the third capacitor block 220 connected to the receiving coil 210 is changed to a relatively small value, so that impedance matching can be made more easily (Fig. see 5).

Meanwhile, the transmission coil 111 of the induction power transmitter 110 can receive induction power state information from the induction power receiver 200 in an ASK communication method. This induced power state information is notified to the transmission control unit, and accordingly, the transmission control unit 130 can maximize power transmission efficiency by adjusting impedance matching.

4 is a block diagram illustrating an electronic configuration of a magnetic resonance transmission unit in a hybrid wireless power transmission device according to an embodiment of the present invention. As shown in FIG. 4, the magnetic resonance transmitter 120 is configured to receive resonance power state information from the transmission antenna 121, the second variable capacitor block 123, and the magnetic resonance receiver 300. A short range communication unit 125 may be included.

The transmission antenna 121 is a component for transmitting a resonance power signal, and the second variable capacitor block 123 receives the transmission antenna 121 and the magnetic resonance receiver 300 under the control of the transmission controller 130. It is a component whose capacitance value is changed for impedance matching with the antenna 310 . Here, the second variable capacitor block 123 is changed to a relatively large value and the fourth capacitor block 320 connected to the receiving antenna 310 is changed to a relatively small value, so that impedance matching can be more easily achieved.

In addition, the short-range communication unit 125 receives the resonance power state information transmitted through the short-range communication module 350 of the magnetic resonance receiving device 300 and informs the transmission control unit of this information. Accordingly, the transmission controller 130 adjusts impedance matching based on the resonant power state information.

FIG. 5 is a block diagram illustrating an electronic configuration of an inductive power receiving device in the wireless power transmission system of FIG. 2 . As shown in FIG. 5, the inductive power receiving device 200 related to an embodiment of the present invention includes a receiving coil 210, a third variable capacitor block 220, a rectifier 230, a load 240, and An inductive reception control unit 250 may be included.

Here, descriptions of components overlapping those described in FIG. 3 will be omitted. As shown in FIG. 3 , the inductive reception control unit 250 may sense the charging state from the load 240 to generate inductive power state information and transmit it as an ASK communication signal through the receiving coil 210. In addition, the capacitance of the third variable capacitor block 220 is adjusted based on state information received from the transmitting device 100 through the receiving coil 210 . At this time, the capacitance of the third variable capacitor block 220 is finely adjusted.

Accordingly, when the resonance power signal and the induced power signal are oscillated at the same time and the impedance matching is distorted, the corresponding impedance matching is adjusted, so that the power transmission efficiency can be maximized.

With this configuration, the power signal received through the receiving coil 210 impedance-matched by the third variable capacitor block 220 is rectified as DC power in the rectifying unit 230 and supplied to the load, whereby the load is will be charged

FIG. 6 is a block diagram illustrating an electronic configuration of a resonance power receiving device in the wireless power transmission system of FIG. 2 . As shown in FIG. 6, the magnetic resonance receiver 300 related to an embodiment of the present invention includes a receiving antenna 310, a fourth variable capacitor block 320, a rectifier 330, a load 340, It may include a short-distance communication module 350 and a resonance reception control unit 360.

Here, descriptions of components overlapping those described in FIG. 4 will be omitted. As shown in FIG. 6 , the resonance reception control unit 360 detects the charging state from the load 340 to generate resonance power state information and transmits it to the hybrid transmission device 100 through the short-range communication module 350. will be sent In addition, the capacitance of the fourth variable capacitor block 320 is adjusted based on state information received from the transmission device 100 through the short range communication module 350 . At this time, the capacitance of the fourth variable capacitor block 320 is finely adjusted.

Accordingly, when the resonance power signal and the induced power signal are oscillated at the same time and the impedance matching is distorted, the corresponding impedance matching is adjusted, so that the power transmission efficiency can be maximized.

With this configuration, the power signal received through the reception antenna 310 impedance-matched by the fourth variable capacitor block 320 is rectified as DC power in the rectifier 330 and supplied to the load 340. Accordingly, the load 340 is charged.

Hereinafter, a circuit configuration of the variable capacitor block will be described with reference to FIG. 7 . The variable capacitor block described in FIG. 7 is examples that can be applied to all of the first to fourth capacitor blocks described in FIGS. 1 to 6 .

7 is a circuit diagram of first to fourth variable capacitor blocks included in a wireless power transmission system including a hybrid wireless power transmission device according to an embodiment of the present invention.

As shown in FIG. 7, a variable capacitor block of a wireless power transmission system capable of transmitting and receiving an induced power signal and a resonance power signal, which is an embodiment of the present invention, includes a plurality of capacitors C1 to C4 connected in series and parallel. , It may be composed of switches (S1, S2) disposed between the capacitors. By configuring as described above, it is possible to combine capacitances of various values with a smaller number of capacitors. Accordingly, the number of parts is reduced, and thus it is possible to contribute to weight reduction and thinning of the product.

According to one embodiment of the present invention having the above configuration, the hybrid wireless power transmitter simultaneously transmits a wireless power signal to an inductive power receiver in a charging position and a magnetic resonance receiver in a charging distance so that charging is performed simultaneously. can do.

In addition, transmission efficiency of resonance charging and inductive charging can be maximized by correcting an interference phenomenon that may occur when the transmission coil and the transmission antenna are simultaneously operated by changing the capacitance.

The hybrid wireless power transmission device capable of transmitting the resonance power signal and the inductive power signal described above and the hybrid wireless power transmission system including the same are not limited to the configuration and method of the above-described embodiments, but the above Embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

A: charging position
B: charging distance
100: (hybrid) wireless power transmission device
110: induction power transmission unit
111: transmission coil
113: first variable capacitor block
120: magnetic resonance transmission unit
121: transmission antenna
123: second variable capacitor block
125: short-range communication unit
200: induction power receiving device
210: receiving coil
220: third variable capacitor block
230: rectifying unit
240: load (battery)
250: inductive reception control unit
300: magnetic resonance receiving device
310: receiving antenna
320: fourth variable capacitor block
330: rectifying unit
340: load
350: short-range communication module
360: resonance reception control unit

Claims (5)

A hybrid wireless power transmission device capable of transmitting a resonant power signal and an inductive power signal,
an induction power transmission unit configured to transmit the induction power signal, the induction power transmission unit including a transmission coil and a first variable capacitor block connected to the transmission coil;
a magnetic resonance power transmission unit configured to transmit the resonance power signal, the magnetic resonance power transmission unit including a transmission antenna and a second variable capacitor block connected to the transmission antenna;
A transmission controller controlling the inductive power transmitter and the magnetic resonance power transmitter to simultaneously oscillate the inductive power signal and the resonance power signal while adjusting the first variable capacitor block and the second variable capacitor block;
Each of the first variable capacitor block and the second variable capacitor block includes a plurality of capacitors connected in series and parallel, and a switching unit disposed between the capacitors,
At least one connection state between the capacitors may be set in series and in accordance with the switching state of the switching unit to correct interference between the induction power signal and the resonance power signal when the induction power signal and the resonance power signal are simultaneously oscillated. switched between parallel;
The transmission controller first randomly adjusts the capacitance of the second variable capacitor block to perform impedance matching of the second variable capacitor block, and then corrects interference between the induced power signal and the resonance power signal. A hybrid wireless power transmission device capable of transmitting a resonance power signal and an inductive power signal, which attempts impedance matching of a variable capacitor block. According to claim 1,
The magnetic resonance transmitter further includes a short-range communication unit for receiving resonance power state information from a resonance receiver,
The transmission control unit,
Attempting impedance matching by adjusting capacitances of the first and second variable capacitor blocks based on the resonant power state information and the induced power state information received through the transmission coil, the resonant power signal and the induced power A hybrid wireless power transmission device capable of transmitting signals. The hybrid wireless power transmission device according to claim 1 or 2;
An inductive power receiving device including a receiving coil, a third variable capacitor block connected to the receiving coil, and an inductive receiving control unit adjusting a capacitance of the third variable capacitor block;
A hybrid wireless power transmission system comprising a magnetic resonance receiver comprising a receiving antenna, a fourth variable capacitor block connected to the receiving antenna, and a resonance receiving control unit adjusting a capacitance of the fourth variable capacitor block. According to claim 3,
The hybrid wireless power transmission system, wherein the inductive reception control unit finely adjusts the capacitance of the third variable capacitor block. According to claim 4.
The resonance reception control unit finely adjusts the capacitance of the fourth variable capacitor block, the hybrid wireless power transmission system.

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