JP2013115917A - Non-contact power transmission transmission apparatus, non-contact power transmission reception apparatus, non-contact power transmission and communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact power transmission apparatus, non-contact power transmission reception apparatus, and non-contact power transmission and communication system, capable of transmitting electric power and information with a simple and low-cost configuration without using a high withstanding voltage component.SOLUTION: The amplitude of a power transmission waveform is modulated or demodulated by a power transmission coil 17 or a power reception coil 33 and an insulated transmission-side signal coil 23 or a power reception-side signal coil 42 to transmit electric power and information.

Description

  The present invention relates to a non-contact power transmission power transmission device, a non-contact power transmission power reception device, a non-contact power transmission, and a communication system that transmit power and information to a portable electronic device such as a portable terminal.

  Conventionally, for example, Patent Documents 1 and 2 are known as this type of contactless power transmission and communication system. In Patent Document 1, a charger is provided with a full-bridge composite resonance circuit in which a resonance circuit including a primary coil is connected in the middle of a full-bridge circuit using a switching element FET as a circuit that generates alternating power. By performing on / off control for each, and changing the resistance value as a full-bridge composite resonance circuit including a resonance circuit based on information to be transmitted to the secondary coil, the alternating power excited in the primary coil It is disclosed to modulate the amplitude.

  In Patent Document 2, a full-bridge composite resonance circuit in which a resonance circuit including a primary coil is connected to the middle of a full-bridge circuit using a switching element FET as a circuit for generating alternating power is provided in a charger. The amplitude of the alternating power excited in the primary coil can be modulated by performing on / off control for each of the above and changing the on-time of the switching element FET based on information to be transmitted to the secondary coil. It is disclosed.

JP 2011-114485 A JP 2011-114886 A

  However, in Patent Document 1, depending on the configuration of the non-contact power transmission and the communication system, the voltage across the primary coil becomes a high voltage of 100 Vpp or higher, so that the resonance circuit is based on information to be transmitted to the secondary coil. When changing the resistance value as a full-bridge composite resonance circuit including, it was necessary to select a high voltage component. Further, in Patent Document 2, the on-time is changed in order to modulate the amplitude of the alternating power excited in the primary coil by changing the on-time of the switching element FET based on information to be transmitted to the secondary coil. If changed, the impedance of the load as viewed from the switching element FET changes, so that a plurality of matching circuits are required, and the circuit is complicated.

  Accordingly, the present invention provides a non-contact power transmission power transmission device, a non-contact power transmission power reception device, a non-contact power transmission and a communication system capable of transmitting power and information with a simple and inexpensive configuration without using high-voltage components. The purpose is to supply.

  In order to solve the above problems, the non-contact power transmission power transmission device, the non-contact power transmission power reception device, the non-contact power transmission and the communication system of the present invention are either a non-contact power transmission power transmission device or a non-contact power transmission power reception device. Either or both, the power transmission waveform and power reception unit that transmit power and the power transmission signal unit and power reception signal unit that exchanges information by changing the amplitude of the power transmission waveform are insulated from each other, thereby configuring the amplitude of the power transmission waveform. Is modulated or demodulated to transmit power and information simultaneously.

  That is, according to the present invention, the power transmission unit includes a power transmission unit that performs power transmission and a power transmission signal unit that performs information transmission. The power transmission unit transmits power and information in a contactless manner using a power transmission waveform, and generates a pulse waveform at a constant frequency. An oscillation circuit to be generated, a drive circuit that generates alternating power according to the frequency of the oscillation circuit, a DC power source that supplies power to be transmitted to the drive circuit, and a matching circuit that performs impedance matching with the drive circuit, A power transmission coil that transmits a power transmission waveform from the matching circuit, and the power transmission signal unit superimposes information on the power transmission waveform of the power transmission coil, and the power is transmitted according to information on a power transmission side transmission signal from the outside. A transmission signal modulation circuit that generates a signal that modulates the transmission waveform, and an amplitude of the power transmission waveform of the power transmission coil is modulated by a signal of the transmission signal modulation circuit to superimpose information. That is composed of the power transmission side signal coil, the power transmitting unit and the power transmission signal part is contactless power transmission transmitting apparatus characterized by being electrically insulated are obtained.

  In addition, according to the present invention, the power transmission unit includes a power transmission unit that performs power transmission and a power transmission signal unit that performs information transmission. The power transmission unit transmits power and information in a contactless manner using a power transmission waveform, and generates a pulse waveform at a constant frequency. An oscillation circuit to be generated, a drive circuit that generates alternating power according to the frequency of the oscillation circuit, a DC power source that supplies power to be transmitted to the drive circuit, and a matching circuit that performs impedance matching with the drive circuit, A power transmission coil that transmits a power transmission waveform from the matching circuit, and the power transmission signal unit superimposes information on the power transmission waveform of the power transmission coil or detects information, and the power of the power transmission coil The power transmission waveform of the power transmission coil is modulated by information on the power transmission side signal coil that modulates the amplitude of the transmission waveform or detects superimposed information, and the power transmission side transmission signal from the outside. A transmission signal modulation circuit of a power transmission signal unit that generates a signal to be modulated, a reception signal demodulation circuit of a power transmission signal unit that demodulates information detected by the power transmission side signal coil and outputs it to the outside as a power transmission side reception signal, and the power transmission A transmission signal modulation circuit of the power transmission signal unit to be connected to a side signal coil and a switching circuit for switching a reception signal demodulation circuit of the power transmission signal unit, and the power transmission unit and the power transmission signal unit are electrically insulated Thus, a non-contact power transmission power transmission device can be obtained.

  Moreover, according to this invention, the said non-contact electric power transmission power transmission apparatus characterized by the said power transmission coil and the said power transmission side signal coil being arrange | positioned in the position couple | bonded magnetically by non-contact is obtained.

  According to the present invention, the transmission signal modulation circuit includes a switching element and a resistor, and controls the on / off operation of the switching element by the power transmission side transmission signal. A power transmission power transmission device is obtained.

  According to the present invention, the received signal demodulation circuit includes a signal amplification circuit and a comparison circuit, and demodulates the information superimposed on the power transmission waveform. A device is obtained.

  According to the present invention, the power receiving unit includes a power receiving unit that performs power transmission and a power receiving signal unit that performs information transmission. The power receiving unit transmits power and information in a non-contact manner using a power transmission waveform, and the power transmission waveform is transmitted. A receiving coil, a rectifying circuit that converts alternating power received by the receiving coil into DC power, a DC-DC converter that converts a DC voltage of the rectifying circuit into an arbitrary voltage, and an outside from the DC-DC converter And a charge control circuit for controlling power supplied to the connected charging device, and further, the power reception signal unit demodulates information superimposed on a power transmission waveform of the power reception coil, and power transmission of the power reception coil A power receiving side signal coil for detecting information superimposed on the waveform, and a received signal demodulating circuit for demodulating the information detected by the power receiving side signal coil and outputting it as a power receiving side received signal to the outside In the configuration, the receiving signal portion and the power receiving portion is a non-contact power transmission receiving apparatus characterized by being electrically insulated obtained.

  According to the present invention, the power receiving unit includes a power receiving unit that performs power transmission and a power receiving signal unit that performs information transmission. The power receiving unit transmits power and information in a non-contact manner using a power transmission waveform, and the power transmission waveform is transmitted. A receiving coil, a rectifying circuit that converts alternating power received by the receiving coil into DC power, a DC-DC converter that converts a DC voltage of the rectifying circuit into an arbitrary voltage, and an outside from the DC-DC converter And a charging control circuit that controls power supplied to the connected charging device, and further, the power receiving signal unit detects information on a power transmission waveform of the power receiving coil or superimposes information, and the power receiving coil The power receiving waveform of the power receiving waveform is detected, or the power receiving side signal coil that modulates the amplitude, and the information detected by the power receiving side signal coil are demodulated to the outside. A reception signal demodulating circuit of a power reception signal section that outputs as a signal, a transmission signal modulation circuit of a power reception signal section that generates a signal that modulates the power transmission waveform according to information of an external power reception side transmission signal, and a connection to the power transmission side signal coil And a switching circuit that switches between a transmission signal modulation circuit of the power reception signal unit and a reception signal demodulation circuit of the power reception signal unit, wherein the power reception unit and the power reception signal unit are electrically insulated. A contact power transmission power receiving device is obtained.

  In addition, according to the present invention, there can be obtained the non-contact power transmission power receiving device described above, wherein the power receiving coil and the power receiving side signal coil are disposed at a position where they are magnetically coupled in a non-contact manner.

  According to the present invention, the reception signal demodulating circuit includes a signal amplifying circuit and a comparison circuit, and demodulates information superimposed on the power transmission waveform. A device is obtained.

  According to the present invention, the transmission signal modulation circuit includes a switching element and a resistor, and controls the on / off operation of the switching element by the power transmission side transmission signal. A power transmission power receiving device is obtained.

  Moreover, according to this invention, the non-contact power transmission and communication system characterized by being comprised from the said or said non-contact power transmission power transmission apparatus and said non-contact power transmission power receiving apparatus are obtained.

  Moreover, according to this invention, the non-contact power transmission and communication system characterized by being comprised from the said or said non-contact power transmission power transmission apparatus and said non-contact power transmission power receiving apparatus are obtained.

  Further, according to the present invention, the power transmission coil and the power transmission side signal coil, and the power reception coil and the power reception side signal coil are arranged at positions where they are magnetically coupled in a non-contact manner, respectively. The above contactless power transmission and communication system can be obtained.

  According to the present invention, the transmission signal modulation circuit includes a switching element and a resistor, and the on / off operation of the switching element is controlled by the power transmission side transmission signal or the power reception side transmission signal. A non-contact power transmission and communication system as described above is obtained.

  According to the present invention, the reception signal demodulation circuit includes a signal amplification circuit and a comparison circuit, and information superimposed on the power transmission waveform of each power transmission unit or the power transmission waveform of the power reception unit is demodulated. The above-described contactless power transmission and communication system can be obtained.

  A non-contact power transmission power transmission device, a non-contact power transmission power reception device, a non-contact power transmission and a communication system according to the present invention includes a power transmission unit that transmits power and a power transmission signal that exchanges information by changing the amplitude of a power transmission waveform. By insulating the power receiving portion and the power receiving signal portion, it is possible to perform power transmission and communication with a simple and inexpensive configuration without using high-voltage components.

The block diagram of the non-contact electric power transmission power transmission apparatus which concerns on Embodiment 1 of this invention. 1 is a block diagram of a transmission signal modulation circuit according to a first embodiment of the present invention. The block diagram of the non-contact electric power transmission power transmission apparatus which concerns on Embodiment 2 of this invention. The block diagram of the non-contact electric power transmission power receiving apparatus which concerns on Embodiment 3 of this invention. The block diagram of the received signal demodulation circuit which concerns on Embodiment 3 of this invention. The block diagram of the non-contact electric power transmission power receiving apparatus which concerns on Embodiment 4 of this invention. The block diagram of the non-contact electric power transmission and communication system which concern on Embodiment 5 of this invention. Explanatory drawing of each part waveform of the non-contact electric power transmission which concerns on Embodiment 5 of this invention, and a communication system. FIG. 8A shows a transmission power waveform. FIG. 8B shows a power transmission side transmission signal waveform. FIG.8 (c) is a power transmission side electric power transmission waveform. FIG. 8D shows a power receiving side power transmission waveform. FIG. 8E shows a charging power waveform. FIG. 8F shows a received signal waveform on the power receiving side. The block diagram of the non-contact electric power transmission and communication system which concern on Embodiment 6 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
The non-contact power transmission power transmission device of the present invention will be described. FIG. 1 is a block diagram of a non-contact power transmission power transmission apparatus according to Embodiment 1 of the present invention. FIG. 2 is a block diagram of a transmission signal modulation circuit according to Embodiment 1 of the present invention.

  The non-contact power transmission power transmission device 11 of the present invention includes a power transmission unit 12 that performs power transmission and a power transmission signal unit 21 that performs information transmission. The power transmission unit 12 includes an oscillation circuit 14 that generates a pulse waveform at a constant frequency, a drive circuit 15 that generates alternating power according to the frequency of the oscillation circuit 14, and a DC power source 13 that supplies power to be transmitted to the drive circuit 15. And a matching circuit 16 that performs impedance matching with the drive circuit 15 and a power transmission coil 17 that transmits a power transmission waveform from the matching circuit 16. Further, the power transmission signal unit 21 generates a signal for modulating the power transmission waveform based on the information of the power transmission side transmission signal 24 from the outside in order to superimpose information on the power transmission waveform of the power transmission coil 17; The power transmission waveform of the power transmission coil 17 is modulated by the signal of the transmission signal modulation circuit 22 and the power transmission side signal coil 23 is configured to superimpose information. The power transmission unit 12 and the power transmission signal unit 21 of the non-contact power transmission power transmission device 11 are configured to be electrically insulated.

  When power is supplied from the DC power supply 13 to the drive circuit 15, the power is switched by a switching element of the drive circuit 15 in accordance with the frequency of the oscillation circuit 14 to become alternating power, which is sent to the matching circuit 16. The matching circuit 16 performs impedance matching with the power transmission coil 17 and supplies power to the power transmission coil 17. In order to superimpose information on the power transmission waveform of the power transmission coil 17, the power transmission side signal coil 23 is overlapped in the vicinity of the power transmission coil 17 or the power transmission coil 17 in a non-contact manner, and the power transmission coil 17 and the power transmission side signal coil 23 are It is configured to be in a non-contact and magnetically coupled position. A transmission signal modulation circuit 22 generates a signal that modulates the amplitude of the power transmission waveform of the power transmission coil 17 and supplies the power transmission side transmission signal 24 to the power transmission side signal coil 23. The power transmission side signal coil 23 generates a magnetic field according to the signal of the transmission signal modulation circuit 22 and modulates the amplitude of the power transmission waveform of the power transmission coil 17. Thereby, the information of the power transmission side transmission signal 24 is superimposed on the power transmission waveform of the power transmission coil 17 to transmit the information.

  As shown in FIG. 2, the transmission signal modulation circuit 22 includes a signal drive circuit 26, a DC power source 29, a resistor 27, and an FET 28 that functions as a switching element. The power transmission side transmission signal 24 is input to the signal driving circuit 26 to generate a signal for modulating the amplitude of the power transmission waveform. Further, by inputting to the control terminal of the gate of the FET 28, the direct current from the DC power source 29 is controlled by the on and off operations to change to an alternating signal for operating the power transmission side signal coil 23. A magnetic field is generated in the power transmission side signal coil 23 by this alternating signal, and the amplitude of the power transmission waveform of the power transmission coil 17 is modulated. The resistor 27 is provided to protect the FET 28 against a current from the DC power supply 29.

  The power transmission waveform obtained by modulating the amplitude of the power transmission waveform from the non-contact power transmission power transmission device 11 of the present invention is demodulated to the original information by a conventional non-contact power transmission power receiving device that demodulates the amplitude. It is possible.

(Embodiment 2)
Regarding the non-contact power transmission power transmission device of the present invention, a power transmission signal unit different from the configuration of the first embodiment will be described. FIG. 3 is a block diagram of a non-contact power transmission power transmission apparatus according to Embodiment 2 of the present invention.

  The non-contact power transmission power transmission device 11 of the present invention includes a power transmission unit 12 that performs power transmission and a power transmission signal unit 21 that performs information transmission. The power transmission unit 12 has the same configuration as that of the first embodiment. The power transmission signal unit 21 modulates the amplitude of the power transmission waveform of the power transmission coil 17 or detects the superimposed information, and the power transmission coil 17 based on the information of the power transmission side transmission signal 24 from the outside. The transmission signal modulation circuit 22 of the power transmission signal unit 21 that generates a signal that modulates the power transmission waveform of the power transmission signal 21 and the power transmission signal unit 21 that demodulates the information detected by the power transmission side signal coil 23 and outputs it to the outside as the power transmission side reception signal 52 The reception signal demodulating circuit 43 of FIG. Further, the transmission signal modulation circuit 22 connected to the power transmission side signal coil 23 and the switching circuit 51 for switching the reception signal demodulation circuit 43 are configured. The power transmission unit 12 and the power transmission signal unit 21 of the non-contact power transmission power transmission device 11 are configured to be electrically insulated.

  In order to superimpose information on the power transmission waveform of the power transmission coil 17 or to detect the superimposed information, the power transmission side signal coil 23 is overlapped with the vicinity of the power transmission coil 17 or the power transmission coil 17 in a non-contact manner. The power transmission coil 17 and the power transmission side signal coil 23 are configured to be in a non-contact magnetically coupled position.

  The power transmission signal unit 21 is different from the first embodiment in that the switching circuit 51 can select two circuits. When the transmission signal modulation circuit 22 is selected by the switching circuit 51, a signal for modulating the amplitude of the power transmission waveform of the power transmission coil 17 is generated from the power transmission side transmission signal 24 by the transmission signal modulation circuit 22, and the power transmission side signal coil is generated. 23. The power transmission side signal coil 23 generates a magnetic field according to the signal of the transmission signal modulation circuit 22 and modulates the amplitude of the power transmission waveform of the power transmission coil 17. Thereby, the information of the power transmission side transmission signal 24 is superimposed on the power transmission waveform of the power transmission coil 17 and the information is transmitted. When the reception signal demodulation circuit 43 is selected by the switching circuit 51, information superimposed on the power transmission waveform of the power transmission coil 17 is detected by the power transmission side signal coil 23, and the information is demodulated by the reception signal demodulation circuit 43. Then, it is supplied to the outside as a power transmission side reception signal 52. Information superimposed on the power transmission waveform of the power transmission coil 17 is transmitted.

(Embodiment 3)
A non-contact power transmission power receiving device of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram of a non-contact power transmission power receiving device according to Embodiment 3 of the present invention. FIG. 5 is a block diagram of a received signal demodulation circuit according to Embodiment 3 of the present invention.

  The non-contact power transmission power receiving device 31 of the present invention includes a power receiving unit 32 that performs power transmission and a power reception signal unit 41 that performs information transmission. The power receiving unit 32 includes a power receiving coil 33 that transmits power and information in a non-contact manner using a power transmission waveform, a rectifier circuit 34 that converts alternating power received by the power receiving coil 33 into DC power, and a DC voltage of the rectifier circuit 34 is arbitrarily set. A DC-DC converter 35 that converts the voltage to the above voltage, and a charge control circuit 36 that controls the power supplied from the DC-DC converter 35 to the charging device 37 connected to the outside. Furthermore, the power reception signal unit 41 demodulates the information superimposed on the power transmission waveform of the power reception coil 33 and detects the information superimposed on the power transmission waveform of the power reception coil 33, and the power reception side A reception signal demodulation circuit 43 that demodulates the information detected by the signal coil 42 and outputs it as a power reception signal 44 to the outside. The power reception unit 32 and the power reception signal unit 41 of the non-contact power transmission power reception device 31 are configured to be electrically insulated.

  When alternating power is supplied from the power receiving coil 33 to the rectifying circuit 34, the power is rectified for charging, and the voltage is supplied by the DC-DC converter 35 in accordance with the specifications of the charging device 37 such as a secondary battery connected to the outside. Then, the charge control circuit 36 controls and charges the charging device 37. The power receiving side signal coil 42 is arranged in the vicinity of the power receiving coil 33 or in a contactless manner with the power receiving coil 33 so that the power receiving coil 33 and the power receiving side signal coil 42 are in a contactless and magnetically coupled position. The power transmission waveform on which the information of the power receiving coil 33 is superimposed is detected. The power receiving side signal coil 42 detects information superimposed on the power transmission signal, and demodulates the received signal demodulation circuit 43 to obtain a power receiving side received signal 44. Thereby, the information superimposed on the power transmission waveform is transmitted.

  As shown in FIG. 5, the reception signal demodulation circuit 43 includes a capacitor 46, a rectifier 47, a signal amplification circuit 48, and a comparison circuit 49. The information signal detected by the power receiving side signal coil 42 is rectified by the rectifier 47, the information signal is amplified by the signal amplifying circuit 48, and is compared with an arbitrary level by the comparison circuit 49 and demodulated to the power receiving side received signal 44. The capacitor 46 is provided for protection against noise from the power receiving side signal coil 42.

  Note that the non-contact power transmission power receiving device 31 of the present invention can demodulate information from a non-contact power transmission power transmission device that modulates the amplitude of a power transmission waveform that has been conventionally used.

(Embodiment 4)
Regarding the non-contact power transmission power receiving device of the present invention, a power receiving signal unit different from the configuration of the third embodiment will be described. FIG. 6 is a block diagram of a non-contact power transmission power receiving device according to Embodiment 4 of the present invention.

  The non-contact power transmission power receiving device 31 of the present invention includes a power receiving unit 32 that performs power transmission and a power reception signal unit 41 that performs information transmission. Power receiving unit 32 has the same configuration as that of the third embodiment. The power reception signal unit 41 includes a power reception side signal coil 42 that detects information superimposed on the power transmission waveform of the power transmission coil 17 or modulates the amplitude of the power transmission waveform of the power transmission coil 17, and the power reception side signal coil 42. The power transmission waveform of the power receiving coil 33 is modulated by the received signal demodulating circuit 43 of the power receiving signal unit 41 that demodulates the detected information and outputs it as the power receiving side received signal 44 and the information of the power receiving side transmission signal 53 from the outside. It comprises a transmission signal modulation circuit 22 of a power reception signal section 41 that generates a signal and a power reception side signal coil 42. Further, the power reception signal demodulating circuit 43 of the power receiving signal unit 41 connected to the power receiving side signal coil 42 and the switching circuit 51 for switching the transmission signal modulating circuit 22 of the power receiving signal unit 41 are configured. The power receiving unit 32 and the power receiving signal unit 41 of the non-contact power transmission power receiving device 31 are configured to be electrically insulated.

  In order to detect the information superimposed on the power transmission waveform of the power receiving coil 33 or to superimpose the information, the power receiving side signal coil 42 is overlapped with the vicinity of the power receiving coil 33 or the power receiving coil 33 in a non-contact manner. The power receiving coil 33 and the power receiving side signal coil 42 are configured to be in a position where they are magnetically coupled without contact.

  The power receiving signal unit 41 is different from the third embodiment in that the switching circuit 51 can select two circuits. When the reception signal demodulation circuit 43 is selected by the switching circuit 51, the information superimposed on the power transmission waveform of the power reception coil 33 is detected by the power reception side signal coil 42, and the information is demodulated by the reception signal demodulation circuit 43. The power reception side reception signal 44 is supplied to the outside. Information superimposed on the power transmission waveform of the power receiving coil 33 is transmitted. Further, when the transmission signal modulation circuit 22 is selected by the switching circuit 51, the power reception side transmission signal 53 is generated by the transmission signal modulation circuit 22 to generate a signal for modulating the amplitude of the power transmission waveform of the power reception coil 33. The signal coil 42 is supplied. The power receiving side signal coil 42 generates a magnetic field according to the signal of the transmission signal modulation circuit 22 and modulates the amplitude of the power transmission waveform of the power receiving coil 33. Thereby, the information of the power receiving side transmission signal 53 is superimposed on the power transmission waveform of the power receiving coil 33 and the information is transmitted.

(Embodiment 5)
The contactless power transmission and communication system of the present invention will be described with reference to the drawings. FIG. 7 is a block diagram of contactless power transmission and a communication system according to Embodiment 5 of the present invention.

  The contactless power transmission and communication system according to the present invention includes a contactless power transmission power transmission device 11 and a contactless power transmission power reception device 31. The non-contact power transmission power transmission device 11 and the non-contact power transmission power reception device 31 perform power transmission and information transmission by modulating and demodulating the amplitude of the power transmission waveform.

  The contactless power transmission and communication system according to the fifth embodiment is configured by the contactless power transmission power transmission device 11 according to the first embodiment and the contactless power transmission power receiving device 31 according to the third embodiment. .

  Therefore, the waveform of each part of the non-contact power transmission and communication system described in the fifth embodiment will be described. FIG. 8 is an explanatory diagram of waveforms in each part of the non-contact power transmission and communication system according to Embodiment 5 of the present invention. FIG. 8A shows a transmission power waveform. FIG. 8B is a power transmission side transmission signal waveform. FIG. 8C shows a power transmission side power transmission waveform. FIG. 8D shows a power reception side power transmission waveform. FIG. 8E shows a power waveform for charging. FIG. 8F shows a power reception signal waveform.

  In the non-contact power transmission and communication system of the present invention shown in FIG. 7, waveforms of respective parts when power and information are transmitted from the non-contact power transmission power transmission device 11 to the non-contact power transmission power reception device 31 will be described. The transmission power waveform of the alternating power in FIG. 8A that is the source of power transmission and is output from the drive circuit 15 is information transmitted to the non-contact power transmission power receiving device 31. The power transmission side transmission in FIG. The waveform is superimposed on the waveform of the signal 24 to obtain the power transmission waveform of FIG. 8C transmitted from the power transmission side signal coil 23 whose amplitude is modulated. The power receiving coil 33 is transmitted with the waveform of the power receiving side power transmission shown in FIG. The power-receiving-side power transmission waveform is obtained by rectifying the AC waveform that transmits the power of the power receiving coil 33 by the rectifier circuit 34 and the DC-DC converter 35 to obtain the power waveform for charging shown in FIG. The external charging device 37 is charged via The power receiving side signal coil 42 detects the power transmission waveform of the power receiving coil 33, and the received signal demodulation circuit 43 demodulates the information superimposed on the power transmission waveform to receive the power receiving side received signal 44 in FIG. Waveform of Thereby, it can be confirmed that power and information are transmitted from the non-contact power transmission power transmission device 11 to the non-contact power transmission power reception device 31 with a simple and inexpensive configuration without using high-voltage components.

(Embodiment 6)
The contactless power transmission and communication system of the present invention will be described with reference to the drawings. FIG. 9 is a block diagram of contactless power transmission and a communication system according to Embodiment 6 of the present invention.

  The contactless power transmission and communication system according to the present invention includes a contactless power transmission power transmission device 11 and a contactless power transmission power reception device 31. The non-contact power transmission power transmission device 11 and the non-contact power transmission power reception device 31 perform power transmission and information transmission by modulating and demodulating the amplitude of the power transmission waveform.

  The contactless power transmission and communication system according to the sixth embodiment is configured by the contactless power transmission power transmission device 11 according to the second embodiment and the contactless power transmission power receiving device 31 according to the fourth embodiment. .

  In the fifth embodiment, the waveform of each part when power and information are transmitted from the contactless power transmission and communication device 11 of the contactless power transmission and communication system to the contactless power transmission power receiving device 31 has been described. It is obvious that the same can be done when information is transmitted from the power transmission power transmission device 11 to the non-contact power transmission power reception device 31.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to these embodiment, Even if there is a design change of the range which does not deviate from the summary of this invention, it is included in this invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  The non-contact power transmission and communication system of the present invention can be suitably used particularly for portable devices such as mobile phones, headsets, digital cameras, and digital videos.

DESCRIPTION OF SYMBOLS 11 Contactless power transmission power transmission apparatus 12 Power transmission part 13, 29 DC power supply 14 Oscillation circuit 15 Drive circuit 16 Matching circuit 17 Power transmission coil 21 Power transmission signal part 22 Transmission signal modulation circuit 23 Power transmission side signal coil 24 Power transmission side transmission signal 26 Signal drive circuit 27 Resistance 28 FET
31 Non-contact power transmission power receiving device 32 Power receiving unit 33 Power receiving coil 34 Rectifier circuit 35 DC-DC converter 36 Charging control circuit 37 Charging device 41 Power receiving signal unit 42 Power receiving side signal coil 43 Reception signal demodulating circuit 44 Power receiving side receiving signal 46 Capacitor 47 Rectifier 48 Signal amplification circuit 49 Comparison circuit 51 Switching circuit 52 Power transmission side reception signal 53 Power reception side transmission signal

Claims (15)

It consists of a power transmission unit that performs power transmission and a power transmission signal unit that performs information transmission.
The power transmission unit transmits power and information in a non-contact manner by a power transmission waveform,
An oscillation circuit that generates a pulse waveform at a constant frequency;
A drive circuit for generating alternating power according to the frequency of the oscillation circuit;
A DC power supply for supplying power to be transmitted to the drive circuit;
A matching circuit for impedance matching with the drive circuit;
A power transmission coil that transmits a power transmission waveform from the matching circuit;
Furthermore, the power transmission signal unit superimposes information on the power transmission waveform of the power transmission coil,
A transmission signal modulation circuit that generates a signal that modulates the power transmission waveform according to information on a power transmission side transmission signal from the outside;
A power transmission side signal coil that superimposes information by modulating the amplitude of the power transmission waveform of the power transmission coil with the signal of the transmission signal modulation circuit,
The non-contact power transmission power transmission device, wherein the power transmission unit and the power transmission signal unit are electrically insulated. It consists of a power transmission unit that performs power transmission and a power transmission signal unit that performs information transmission.
The power transmission unit transmits power and information in a non-contact manner by a power transmission waveform,
An oscillation circuit that generates a pulse waveform at a constant frequency;
A drive circuit for generating alternating power according to the frequency of the oscillation circuit;
A DC power supply for supplying power to be transmitted to the drive circuit;
A matching circuit for impedance matching with the drive circuit;
A power transmission coil that transmits a power transmission waveform from the matching circuit;
Furthermore, the power transmission signal unit superimposes information on the power transmission waveform of the power transmission coil, or detects information,
A power transmission side signal coil that modulates the amplitude of the power transmission waveform of the power transmission coil or detects superimposed information;
A transmission signal modulation circuit of a power transmission signal unit that generates a signal that modulates a power transmission waveform of the power transmission coil according to information of a power transmission side transmission signal from the outside;
A received signal demodulation circuit of a power transmission signal unit that demodulates information detected by the power transmission side signal coil and outputs the information as a power transmission side reception signal;
A transmission signal modulation circuit of the power transmission signal unit to be connected to the power transmission side signal coil and a switching circuit for switching a reception signal demodulation circuit of the power transmission signal unit;
The non-contact power transmission power transmission device, wherein the power transmission unit and the power transmission signal unit are electrically insulated.   The non-contact power transmission power transmission device according to claim 1, wherein the power transmission coil and the power transmission side signal coil are arranged at a position where they are magnetically coupled in a non-contact manner.   4. The non-transmission circuit according to claim 1, wherein the transmission signal modulation circuit includes a switching element and a resistor, and controls the on / off operation of the switching element by the power transmission side transmission signal. 5. Contact power transmission device.   The contactless power transmission according to claim 2, wherein the reception signal demodulation circuit includes a signal amplification circuit and a comparison circuit, and demodulates information superimposed on the power transmission waveform. Power transmission device. It consists of a power receiving unit that performs power transmission and a power receiving signal unit that performs information transmission.
The power receiving unit transmits power and information in a non-contact manner using a power transmission waveform,
A power receiving coil through which the power transmission waveform is transmitted;
A rectifier circuit that converts alternating power received by the power receiving coil into direct current power;
A DC-DC converter that converts the DC voltage of the rectifier circuit into an arbitrary voltage;
A charge control circuit for controlling power supplied from the DC-DC converter to a charging device connected to the outside;
Further, the power reception signal unit demodulates information superimposed on the power transmission waveform of the power reception coil,
A power receiving side signal coil for detecting information superimposed on a power transmission waveform of the power receiving coil;
A reception signal demodulation circuit configured to demodulate information detected by the power reception side signal coil and output the information to the outside as a power reception side reception signal;
The non-contact power transmission power receiving device, wherein the power receiving unit and the power receiving signal unit are electrically insulated. It consists of a power receiving unit that performs power transmission and a power receiving signal unit that performs information transmission.
The power receiving unit transmits power and information in a non-contact manner using a power transmission waveform,
A power receiving coil through which the power transmission waveform is transmitted;
A rectifier circuit that converts alternating power received by the power receiving coil into direct current power;
A DC-DC converter that converts the DC voltage of the rectifier circuit into an arbitrary voltage;
A charge control circuit for controlling power supplied from the DC-DC converter to a charging device connected to the outside;
Furthermore, the power reception signal unit detects information of a power transmission waveform of the power reception coil, or superimposes information,
A power receiving side signal coil for detecting information superimposed on a power transmission waveform of the power receiving coil or modulating an amplitude;
A received signal demodulating circuit of a power receiving signal unit that demodulates information detected by the power receiving side signal coil and outputs the demodulated information as a power receiving side received signal;
A transmission signal modulation circuit of a power reception signal unit that generates a signal that modulates the power transmission waveform according to information of an external power reception side transmission signal;
The transmission signal modulation circuit of the power reception signal unit to be connected to the power transmission side signal coil and a switching circuit for switching the reception signal demodulation circuit of the power reception signal unit,
The non-contact power transmission power receiving device, wherein the power receiving unit and the power receiving signal unit are electrically insulated.   The contactless power transmission receiving device according to claim 6 or 7, wherein the power receiving coil and the power receiving side signal coil are disposed at a position where they are magnetically coupled in a non-contact manner.   The contactless power transmission according to any one of claims 6 to 8, wherein the reception signal demodulating circuit includes a signal amplification circuit and a comparison circuit, and demodulates information superimposed on the power transmission waveform. Power receiving device.   10. The non-transmission circuit according to claim 7, wherein the transmission signal modulation circuit includes a switching element and a resistor, and controls the on / off operation of the switching element by the power transmission side transmission signal. Contact power transmission power receiving device.   A non-contact power transmission and communication system comprising the non-contact power transmission and transmission device according to claim 1 and the non-contact power transmission and reception device according to claim 6.   A contactless power transmission and communication system comprising the contactless power transmission and transmission device according to claim 1 and the contactless power transmission and reception device according to claim 7. The power transmission coil and the power transmission side signal coil,
The contactless power transmission and communication system according to claim 11 or 12, wherein the power receiving coil and the power receiving side signal coil are arranged at positions where they are magnetically coupled in a non-contact manner. .   The transmission signal modulation circuit includes a switching element and a resistor, and the on / off operation of the switching element is controlled by the power transmission side transmission signal or the power reception side transmission signal. The contactless power transmission and communication system according to any one of the above.   The reception signal demodulation circuit includes a signal amplification circuit and a comparison circuit, and the power transmission waveform of each of the power transmission units or information superimposed on the power transmission waveform of the power reception unit is demodulated. Item 15. The contactless power transmission and communication system according to any one of Items 11-14.

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