WO2017126112A1

WO2017126112A1 - Power transmission device, high-frequency power supply, and high-frequency rectification circuit

Info

Publication number: WO2017126112A1
Application number: PCT/JP2016/051887
Authority: WO
Inventors: 阿久澤　好幸
Original assignee: 三菱電機エンジニアリング株式会社
Priority date: 2016-01-22
Filing date: 2016-01-22
Publication date: 2017-07-27
Also published as: JPWO2017126112A1; JP6113360B1; TW201728045A

Abstract

The present invention is provided with: a transmission-side AC/AC converter (1) provided with an input circuit (11) into which a commercial alternating current is inputted, and which subjects the commercial alternating current to full-wave rectification, and an inverter (12) which converts the power that has been subjected to full-wave rectification by the input circuit (11), to power having a higher frequency than the frequency of the commercial alternating current; a resonant transmission antenna (2) for transmitting the power that has been converted by the inverter (12); a resonant reception antenna (3) for receiving the power transmitted by the resonant transmission antenna (2); and a reception-side AC/AC converter (4) provided with a full-wave rectification circuit (42) which subjects the power received by the resonant reception antenna (3) to full-wave rectification, and an output circuit (43) which converts the power that has been subjected to full-wave rectification by the full-wave rectification circuit (42), to alternating current having half the frequency.

Description

Power transmission device, high frequency power supply and high frequency rectifier circuit

The present invention relates to a power transmission device, a high-frequency power source, and a high-frequency rectifier circuit that receive commercial AC and transmit power and output AC having the same frequency as the commercial AC.

2. Description of the Related Art Conventionally, a power transmission device that performs wireless power transmission by inputting commercial alternating current is known (see, for example, Patent Document 1). In the power transmission device (contactless power supply facility) disclosed in Patent Document 1, first, a converter having a bridge-connected rectifier diode converts input commercial alternating current into direct current. Then, the inverter converts the direct current into high frequency alternating current (10 kHz). This converted high-frequency alternating current is contactlessly transmitted by a dielectric line (transmission / reception antenna). And the converter which has the rectifier diode connected by bridge | bridging converts the said transmitted high frequency alternating current into direct current | flow. And the inverter converts the said direct current into a high frequency alternating current, and outputs it to the motor used as a load.

FIG. 8 is a diagram showing a conventional power transmission device in a more general functional block.
In the power transmission apparatus shown in FIG. 8, first, AC / DC converter 101 converts the input commercial alternating current (50 Hz in FIG. 8) into direct current. Then, the DC / AC inverter 102 converts the direct current into high-frequency alternating current (6.78 MHz in FIG. 8). This converted high-frequency alternating current is contactlessly transmitted by the resonant transmission /

reception antennas

103 and 104. The AC / DC rectifier circuit 105 converts the transmitted high-frequency alternating current into direct current. The DC / AC inverter 106 converts the direct current into alternating current (50 Hz in FIG. 8) having the same frequency as the commercial alternating current, and outputs the alternating current to the load.

Japanese Patent Laid-Open No. 2005-162119

However, in the conventional power transmission apparatus, as shown in FIG. 8, it is necessary to provide an AC / DC converter 101 on the transmission side and a DC / AC inverter 106 on the reception side. Therefore, there is a problem that the entire apparatus is increased in size, weight, and cost.
In addition, in the conventional configuration, since the input power is repeatedly converted to DC and frequency converted, the input / output power transmission efficiency in the entire apparatus is low and the amount of heat generation is large. The structure becomes larger. Therefore, this also has a problem that the entire apparatus is increased in size, weight, and cost.

The present invention has been made in order to solve the above-described problems, and without using an AC / DC converter and a DC / AC inverter, commercial AC is input to transmit power, and the same frequency as that of the commercial AC. It is an object of the present invention to provide a power transmission device, a high-frequency power supply, and a high-frequency rectifier circuit that can output the alternating current.

The power transmission device according to the present invention receives a commercial alternating current, converts the commercial alternating current into a full-wave rectification, and converts the full-wave rectified power into a power having a frequency higher than the frequency of the commercial alternating current. A high frequency power source having an inverter, a resonant transmission antenna that transmits power converted by the inverter, a resonant reception antenna that receives power transmitted by the resonant transmission antenna, and power received by the resonant reception antenna A full-wave rectifier circuit that performs full-wave rectification, and a high-frequency rectifier circuit that includes an output circuit that converts the full-wave rectified power by the full-wave rectifier circuit into an alternating current having a half frequency.

According to this invention, since it comprised as mentioned above, without using an AC / DC converter and a DC / AC inverter, commercial alternating current is input, electric power transmission is performed, and alternating current of the same frequency as the said commercial alternating current is output. be able to.

It is a figure which shows the structural example of the electric power transmission apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the circuit structural example of the transmitter in Embodiment 1 of this invention. It is a figure which shows the circuit structural example of the receiver in Embodiment 1 of this invention. 4A to 4D are diagrams for explaining an operation example of the transmission apparatus according to Embodiment 1 of the present invention. 5A to 5C are diagrams for explaining an operation example of the receiving apparatus according to Embodiment 1 of the present invention. It is a figure which shows the example of application of the electric power transmission apparatus which concerns on Embodiment 1 of this invention, and is a side view at the time of providing a transmitter in a fixing | fixed part and providing a receiver in a mobile body. It is a figure which shows the structural example at the time of wire-connecting the resonance type transmission antenna and resonance type reception antenna in Embodiment 1 of this invention. It is a figure which shows the structural example of the conventional power transmission apparatus.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
1 is a diagram illustrating a configuration example of a power transmission device according to Embodiment 1 of the present invention.
The power transmission device receives commercial alternating current and performs power transmission to output alternating current having the same frequency as the commercial alternating current. The commercial AC includes low-frequency AC such as AC at a standard frequency (50 Hz or 60 Hz) used at home and abroad and AC at a frequency used for industrial use. In the following, a case where the power transmission apparatus performs wireless power transmission will be described as an example.

As shown in FIG. 1, this power transmission apparatus includes a transmission side AC / AC converter (high frequency power source) 1, a resonance type transmission antenna 2, a resonance type reception antenna 3, and a reception side AC / AC converter (high frequency rectifier circuit) 4. I have. The transmission-side AC / AC converter 1 and the resonance-type transmission antenna 2 constitute a transmission device 5, and the resonance-type reception antenna 3 and the reception-side AC / AC converter 4 constitute a reception device 6.

The transmission-side AC / AC converter 1 receives the commercial alternating current (50 Hz in FIG. 1), and has amplitude modulation of the commercial alternating current having a frequency (100 Hz in FIG. 1) twice that of the commercial alternating current. The power is converted into power having a frequency higher than the frequency (6.78 MHz in FIG. 1). The transmission side AC / AC converter 1 includes an input circuit 11, an inverter 12, and a resonance matching circuit 13.

The input circuit 11 receives the commercial alternating current and performs full-wave rectification on the commercial alternating current. The power that is full-wave rectified by the input circuit 11 is output to the inverter 12.

The inverter 12 converts the power output from the input circuit 11 to the high frequency power by switching at the high frequency. The electric power converted by the inverter 12 is output to the resonant transmission antenna 2 via the resonant matching circuit 13.

The resonance matching circuit 13 matches the output impedance of the inverter 12 and the input impedance of the resonant transmission antenna 2 (matches the resonance conditions with the resonant transmission antenna 2). The resonance matching circuit 13 includes a fixed matching type in which the constant of each element constituting the resonance matching circuit 13 is fixed, a variable matching type in which the constant of each element is variable, and the constant of each element is automatically changed to perform matching. Any of the automatic alignment types that take

The resonance-type transmitting antenna 2 performs a resonance operation by inputting the power converted by the inverter 12 and generates a non-radiation type electromagnetic field in the vicinity so as to transmit power to the resonance-type receiving antenna 3. Type power transmitting antenna.

The resonant receiving antenna 3 is a resonant power receiving antenna that receives power by performing a resonant coupling operation with a non-radiating electromagnetic field from the resonant transmitting antenna 2. The electric power received by the resonance type reception antenna 3 is output to the full wave rectification circuit 42 via a resonance matching circuit 41 (to be described later) of the reception side AC / AC converter 4.

The wireless power transmission method between the resonant transmission antenna 2 and the resonant reception antenna 3 is not particularly limited, and may be any one of a magnetic field resonance method, an electric field resonance method, and an electromagnetic induction method. Also good.

The receiving-side AC / AC converter 4 converts the power received by the resonant receiving antenna 3 into an alternating current having the same frequency as the commercial alternating current (50 Hz in FIG. 1). The reception-side AC / AC converter 4 includes a resonance matching circuit 41, a full-wave rectification circuit 42, and an output circuit 43.

The resonance matching circuit 41 matches the output impedance of the resonance receiving antenna 3 and the input impedance of the full-wave rectification circuit 42 (matches the resonance condition with the resonance receiving antenna 3). The resonance matching circuit 41 includes a fixed matching type in which the constant of each element constituting the resonance matching circuit 41 is fixed, a variable matching type in which the constant of each element is variable, and a constant of each element that is automatically changed to perform matching. Any of the automatic alignment types that take

The full-wave rectification circuit 42 performs full-wave rectification on the electric power received by the resonant receiving antenna 3. The electric power that has been full-wave rectified by the full-wave rectifier circuit 42 is output to the output circuit 43.

The output circuit 43 converts the power that has been full-wave rectified by the full-wave rectifier circuit 42 into an alternating current having a half frequency. Thereby, the alternating current of the same frequency as the said commercial alternating current can be obtained. The electric power converted by the output circuit 43 is output to a load (not shown).

Next, a specific circuit configuration example of the transmission device 5 will be described with reference to FIG.
FIG. 2 is a diagram showing a circuit configuration example of the transmission device 5 according to Embodiment 1 of the present invention. FIG. 2 shows a case where a commercial AC source 7 that outputs commercial AC is connected to the input terminal of the transmission device 5. FIG. 2 shows a case where a bridge rectifier circuit is used as the input circuit 11 and a class E inverter is used as the inverter 12.

First, a circuit configuration example of the transmission side AC / AC converter 1 will be described.
In FIG. 2, the input circuit 11 of the transmission side AC / AC converter 1 includes rectifier diodes D11 to D14.

The rectifier diodes D11 to D14 are bridge-connected and perform full-wave rectification on the power input from the commercial AC source 7.
The rectifier diodes D11 to D14 have the cathode of the rectifier diode D11 and the anode of the rectifier diode D13 connected to one end (plus terminal) of the commercial AC source 7, and the cathode of the rectifier diode D12 and the anode of the rectifier diode D14 of the commercial AC source 7. Connected to the other end (minus terminal).

Further, the inverter 12 of the transmission side AC / AC converter 1 includes an inductor L11, resonant circuit elements (capacitors C11 and C12 and an inductor L12), and a switching element Q11.

The inductor L11 functions to temporarily hold the power input from the input circuit 11 for each operation of the switching element Q11. One end of the inductor L11 is connected to the cathode of the rectifier diode D13 and the cathode of the rectifier diode D14.

The resonant circuit elements (capacitors C11 and C12 and the inductor L12) are for switching the switching operation of the switching element Q11 to a resonant switching operation. That is, with this resonance circuit element, the switching condition of the switching element Q11 is set so that ZVS (zero voltage switching) is established so that the switching loss due to the Ids current and the Vds voltage product is minimized. Yes.

The capacitor C11 has one end connected to the other end of the inductor L11 and the other end connected to the anode of the rectifier diode D11 and the anode of the rectifier diode D12. The inductor L12 has one end connected to the other end of the inductor L11. The capacitor C12 has one end connected to the other end of the inductor L12.

The switching element Q11 performs a switching operation at the above high frequency. The switching element Q11 has a drain terminal connected to the other end of the inductor L11, and a source terminal connected to the anode of the rectifier diode D11 and the anode of the rectifier diode D12.

The resonance matching circuit 13 of the transmission-side AC / AC converter 1 includes capacitors C13 and C14 and an inductor L13.
One end of the capacitor C13 is connected to the other end of the capacitor C12, and the other end is connected to the anode of the rectifier diode D11 and the anode of the rectifier diode D12. Further, one end of the inductor L13 is connected to the other end of the capacitor C12. Capacitor C14 has one end connected to the other end of inductor L13 and the other end connected to the anode of rectifier diode D11 and the anode of rectifier diode D12.

Next, a circuit configuration example of the resonant transmission antenna 2 will be described.
In FIG. 2, the resonant transmission antenna 2 includes capacitors C15 and C16 and an inductor L14. The capacitors C15 and C16 and the inductor L14 set the resonance conditions of the resonant transmission antenna 2. The inductor L14 is also used as an antenna in addition to the function of setting the resonance condition of the resonant transmission antenna 2.

The capacitor C15 has one end connected to the other end of the inductor L13. One end of the capacitor C16 is connected to the anode of the rectifier diode D11 and the anode of the rectifier diode D12. The inductor L14 has one end connected to the other end of the capacitor C15 and the other end connected to the other end of the capacitor C16.

Next, a specific circuit configuration example of the receiving device 6 will be described with reference to FIG.
FIG. 3 is a diagram showing a circuit configuration example of the receiving device 6 according to the first embodiment of the present invention. FIG. 3 shows a case where a bridge rectifier circuit is used as the full-wave rectifier circuit 42 and the output circuit 43 is configured using switching elements Q21 to Q24.

First, a circuit configuration example of the resonant receiving antenna 3 will be described.
In FIG. 3, the resonant receiving antenna 3 includes an inductor L21 and capacitors C21 and C22. The inductor L21 and the capacitors C21 and C22 set the resonance condition of the resonance type receiving antenna 3. The inductor L21 is also used as an antenna in addition to the function of setting the resonance condition of the resonant receiving antenna 3.
The inductor L21 has a capacitor C21 connected to one end and a capacitor C22 connected to the other end.

Next, a circuit configuration example of the receiving side AC / AC converter 4 will be described.
In FIG. 3, the resonance matching circuit 41 of the receiving side AC / AC converter 4 includes an inductor L22 and a capacitor C23.
One end of the inductor L22 is connected to the other end of the capacitor C21. Capacitor C23 has one end connected to the other end of inductor L22 and the other end connected to the other end of capacitor C22.

In addition, the full-wave rectifier circuit 42 of the reception-side AC / AC converter 4 includes rectifier diodes D21 to D24 and a capacitor C24.

The rectifier diodes D21 to D24 are bridge-connected and perform full-wave rectification on the electric power input from the resonant receiving antenna 3.
In the rectifier diodes D21 to D24, the cathode of the rectifier diode D21 and the anode of the rectifier diode D23 are connected to the other end of the inductor L22, and the cathode of the rectifier diode D22 and the anode of the rectifier diode D24 are connected to the other end of the capacitor C22. .

The capacitor C24 smoothes the power that has been full-wave rectified by the rectifier diodes D21 to D24 while leaving the AC component (the waveform shown in FIG. 5B). That is, the capacity of the capacitor C24 is set to a small value such that an AC component (50 Hz, which is the same as that of commercial AC) remains in the output waveform. One end of the capacitor C24 is connected to the cathode of the rectifier diode D23 and the cathode of the rectifier diode D24, and the other end is connected to the anode of the rectifier diode D21 and the anode of the rectifier diode D22.

The output circuit 43 of the receiving side AC / AC converter 4 includes switching elements Q21 to Q24.
The switching element Q21 has a drain terminal connected to the cathode of the rectifier diode D23 and the cathode of the rectifier diode D24, and a source terminal connected to the drain terminal of the switching element Q24. The switching element Q22 has a drain terminal connected to the cathode of the rectifier diode D23 and the cathode of the rectifier diode D24, and a source terminal connected to the drain terminal of the switching element Q23. The switching element Q23 has a source terminal connected to the anode of the rectifier diode D21 and the anode of the rectifier diode D22. The switching element Q24 has a source terminal connected to the anode of the rectifier diode D21 and the anode of the rectifier diode D22.

Of the pair of output terminals of the receiving AC / AC converter 4, the HOT terminal is connected to the source terminal of the switching element Q21 and the drain terminal of the switching element Q24, and the RTN terminal is the source terminal of the switching element Q22 and the switching element Q23. Connected to the drain terminal.

Next, an operation example of the power transmission device configured as described above will be described with reference to FIGS. In the following description, an example is described in which the frequency of the commercial AC input to the power transmission device is 50 Hz and the high frequency used in the power transmission device is 6.78 MHz.
First, in the transmission device 5, when a commercial AC Vin (AC) of 50 Hz is input from the commercial AC source 7 to the input circuit 11 of the transmission-side AC / AC converter 1 (FIG. 4A), the commercial AC is full-wave rectified. (FIG. 4B).

And the inverter 12 converts the electric power from the input circuit 11 into the electric power of 6.78 MHz (FIG. 4C). Here, the peak of the drain-source voltage Vds (Q11) switched at 6.78 MHz by the switching element Q11 changes to a full-wave rectified waveform (100 Hz) of 50 Hz. In FIG. 4C, a waveform indicated by a solid line (a waveform included in a hatched portion) indicates a waveform of power (6.78 MHz) converted by the inverter 12, and a waveform indicated by a broken line indicates a peak of the power. A locus (100 Hz) is shown.

The resonant transmission antenna 2 transmits 6.78 MHz power (transmission wave) having amplitude modulation of 100 Hz (FIG. 4D). In FIG. 4D, a waveform indicated by a solid line (a waveform included in a hatched portion) indicates a waveform of power (6.78 MHz) transmitted by the resonant transmission antenna 2, and a waveform indicated by a broken line indicates the power The peak locus (100 Hz) is shown.

On the other hand, in the receiving device 6, the resonant receiving antenna 3 receives the 6.78 MHz power (transmitted wave) having the amplitude modulation of 100 Hz transmitted by the resonant transmitting antenna 2 (FIG. 5A). The waveform shown in FIG. 5A is the same as the waveform shown in FIG. 4D.

Then, the full-wave rectification circuit 42 of the reception-side AC / AC converter 4 performs full-wave rectification on the power received by the resonant receiving antenna 3 (FIG. 5B). Thereby, the voltage V (C24) of the capacitor C24 becomes a value rectified into a full-wave rectified waveform (100 Hz) of 50 Hz.

Then, the output circuit 43 converts the full-wave rectified power by the full-wave rectifier circuit 42 into half-frequency power. At this time, for example, as shown in FIG. 5B and FIG. 5C, the gate-source voltage Vgs of the switching elements Q21, Q23 and the switching elements Q22, Q24 in accordance with the period of the full-wave rectified by the full-wave rectifier circuit 42. Toggle on / off alternately. Thereby, the output of the receiving device 6 becomes a sine wave having the same frequency as 50 Hz, which is the frequency of the commercial power input to the power transmission device (FIG. 5C).

Next, an application example of the power transmission device according to Embodiment 1 will be described with reference to FIG. FIG. 6 shows a case where the fixing unit 51 is a road surface, and only the resonant transmission antenna 2 of the transmission device 5 and the resonant reception antenna 3 of the reception device 6 are illustrated.
As an application example of the power transmission device according to the first embodiment, the resonant transmission antenna 2 is installed in a fixed portion 51 such as a road surface or a parking lot, and the resonant reception antenna 3 is fixed when stopped or moving. It can be installed on a moving body 52 such as a vehicle facing the section 51. As shown in FIG. 6, when the fixed portion 51 is a road surface, a plurality of resonant transmission antennas 2 are provided along the traveling direction of the moving body 52. Accordingly, power can be transmitted from the resonant transmission antenna 2 to the resonant reception antenna 3 when the moving body 52 is stopped or moving facing the fixed portion 51, and power is supplied to the moving body 52. be able to.

In the above description, the resonant transmission antenna 2 is configured from a single coil. However, the present invention is not limited to this, and the resonant transmission antenna 2 may be composed of two or more coils, for example, a power feeding coil and a resonance coil.
Similarly, in the above description, the case where the resonant receiving antenna 3 is constituted by a single coil has been described. However, the present invention is not limited to this, and the resonant receiving antenna 3 may be composed of two or more coils, for example, a power feeding coil and a resonance coil.

In the above description, it is assumed that the power transmission method between the resonant transmission antenna 2 and the resonant reception antenna 3 is a wireless transmission method. However, the present invention is not limited to this. For example, as shown in FIG. 7, a contact-type resonant coupling transmission in which the resonant transmission antenna 2 and the resonant reception antenna 3 are connected by a conducting wire 8 so as to be equivalently connected at one point. It is good. In FIG. 7, only the resonant transmission antenna 2 of the transmission device 5 and the resonant reception antenna 3 of the reception device 6 are illustrated.

In the above description, a case where an E-class inverter is used as the inverter 12 is shown. However, the present invention is not limited to this, and any inverter that converts input power to the high frequency power by switching at the high frequency may be used. For example, as the inverter 12, a bridge type inverter, a class D inverter, or a class DE inverter may be used.

In the above description, the diode-type bridge rectifier circuit is used as the input circuit 11 and the full-wave rectifier circuit 42. However, the present invention is not limited to this, and any circuit may be used as long as the input power is full-wave rectified. For example, the input circuit 11 and the full-wave rectifier circuit 42 may be configured using field effect transistors (FETs) instead of the rectifier diodes D11 to D14 and D21 to D24.

In the above description, the resonance matching circuit 13 is provided outside the inverter 12. However, the present invention is not limited to this, and the inverter 12 may incorporate the resonance matching circuit 13. For example, when the resonance matching circuit 13 is a fixed matching type, it may be built in the inverter 12, and when it is a variable matching type or an automatic matching type, it may be provided as an external circuit of the inverter 12.
In the above description, the resonance matching circuit 41 is provided outside the full-wave rectifier circuit 42. However, the present invention is not limited to this, and the resonance matching circuit 41 may be built in the full-wave rectifier circuit 42. For example, when the resonance matching circuit 41 is a fixed matching type, it may be built in the full wave rectification circuit 42, and when it is a variable matching type or an automatic matching type, it may be provided as an external circuit of the full wave rectification circuit 42.

In the above description, the output circuit 43 is configured using the switching elements Q21 to Q24. However, the present invention is not limited to this, and any circuit that converts input electric power into half-frequency alternating current may be used. For example, a thyristor, triac, or the like may be used.

As described above, according to the first embodiment, commercial alternating current is input, the input circuit 11 that performs full-wave rectification of the commercial alternating current, and the electric power that has been full-wave rectified by the input circuit 11 than the frequency of the commercial alternating current. A transmission-side AC / AC converter 1 having an inverter 12 that converts power to high frequency power, a resonant transmission antenna 2 that transmits power converted by the inverter 12, and power transmitted by the resonant transmission antenna 2 are received. The resonant receiving antenna 3, the full wave rectification circuit 42 that performs full wave rectification on the power received by the resonant reception antenna 3, and the power that is full wave rectified by the full wave rectification circuit 42 is converted into an alternating current having a half frequency. Since the receiving side AC / AC converter 4 having the output circuit 43 is provided, the AC / DC converter 101 and the DC / AC inverter 106 are not used. Use AC is inputted can perform power transmission outputs an AC of the same frequency as the commercial AC. As a result, the entire apparatus can be reduced in size, weight, and cost as compared with the conventional configuration.

Also, the conversion efficiency is higher than that of the conventional configuration, and the input / output power transmission efficiency in the entire apparatus can be increased. As described above, in the power transmission device according to the first embodiment, since conversion to DC is not performed on the transmission side and the reception side, the power transmission efficiency of input / output in the entire device can be improved compared to the conventional configuration. In addition, since the amount of generated heat is small, the heat sink structure for heat dissipation can be downsized. Also by this, the whole apparatus can be reduced in size, weight, and cost compared with the conventional configuration.

In addition, as described above, since the wireless power transmission of commercial alternating current is possible while reducing the overall size, weight, and cost of the apparatus, it is possible to prevent non-existing equipment (load) that operates with existing commercial alternating current. A contact power transmission system can be easily configured. Therefore, it is effective for practical use and spread of non-contact power transmission without waiting for the appearance of a device incorporating a power receiving function for non-contact power transmission.

In the present invention, any component of the embodiment can be modified or any component of the embodiment can be omitted within the scope of the invention.

Since the power transmission device according to the present invention can output AC with the same frequency as the commercial AC by inputting commercial AC and transmitting power without using an AC / DC converter and a DC / AC inverter, It is suitable for use in a power transmission device or the like that receives commercial AC and transmits power and outputs AC of the same frequency as the commercial AC.

1 AC side AC / AC converter (high frequency power supply), 2 resonance type transmission antenna, 3 resonance type reception antenna, 4 AC side AC / AC converter (high frequency rectification circuit), 5 transmission device, 6 reception device, 7 commercial AC source, 8 conductors, 11 input circuits, 12 inverters, 13 resonance matching circuits, 41 resonance matching circuits, 42 full-wave rectification circuits, 43 output circuits, 51 fixed parts, 52 moving bodies.

Claims

A high-frequency power source having a commercial AC input, an input circuit for full-wave rectification of the commercial AC, and an inverter that converts the full-wave rectified power by the input circuit into power having a frequency higher than the frequency of the commercial AC;
A resonant transmitting antenna for transmitting the power converted by the inverter;
A resonant receiving antenna for receiving the power transmitted by the resonant transmitting antenna;
A full-wave rectifier circuit that full-wave rectifies the power received by the resonant receiving antenna, and a high-frequency rectifier circuit that has an output circuit that converts the full-wave rectified power by the full-wave rectifier circuit into half-frequency alternating current; A power transmission device comprising:
The power transmission device according to claim 1, wherein the inverter is a class E inverter.
The power transmission device according to claim 1, wherein the full-wave rectifier circuit is a bridge rectifier circuit.
The power transmission device according to claim 1, wherein the resonant transmission antenna and the resonant reception antenna perform power transmission by magnetic field resonance, electric field resonance, or electromagnetic induction.
The power transmission device according to claim 1, wherein the resonant transmission antenna and the resonant reception antenna are equivalently connected at one point.
The power transmission device according to claim 1, wherein both or one of the resonant transmission antenna and the resonant reception antenna is configured by two or more coils.
The resonant transmission antenna is installed in a fixed part,
The power transmission device according to claim 1, wherein the resonant receiving antenna is installed on a moving body that faces the fixed portion when stopped or during movement.
A high-frequency power source used in a power transmission device that receives commercial AC and transmits power and outputs AC of the same frequency as the commercial AC,
An input circuit that receives the commercial alternating current and performs full-wave rectification of the commercial alternating current;
A high-frequency power source comprising: an inverter that converts electric power that has been full-wave rectified by the input circuit into electric power having a frequency higher than the frequency of the commercial AC.
A high-frequency rectifier circuit used in a power transmission device that receives commercial AC and performs power transmission to output AC of the same frequency as the commercial AC,
A full-wave rectifier circuit that full-wave rectifies the input power;
A high-frequency rectifier circuit comprising: an output circuit that obtains the alternating current by converting electric power that has been full-wave rectified by the full-wave rectifier circuit into an alternating current having a half frequency.