POWER RECEIVER, RESONANCE-TYPE CONTACTLESS POWER SUPPLY AND CONTROL METHOD THEREFOR
First Claim
1. A resonance-type contactless power supply comprising:
- a power transmitter, comprising;
an AC current generating circuit configured to generate an AC current having a first current strength parameter;
a transmitter-side resonant circuit comprising a transmitting coil for receiving said AC current and transmitting electric energy; and
a transmitter-side control circuit configured to obtain a first signal representing said first current strength parameter and a number of power receivers being coupled to said transmitter-side resonant circuit, and to transfer them wirelessly;
at least one power receiver, comprising;
a receiver-side resonant circuit comprising a receiving coil which is separated from but coupled to said transmitting coil in a contactless manner, and configured to receive electric energy from said transmitting coil;
a rectifier circuit being coupled to said receiver-side resonant circuit;
a power converter being coupled to said rectifier circuit; and
a receiver-side control circuit configured to regulate said power converter for maintaining a second current strength parameter to be m times larger than said first current parameter,wherein
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Accused Products
Abstract
The present disclosure relates to a power receiver, a resonance-type contactless power supply and a control method. The power converter is coupled between a receiver-side resonant circuit and a load, and is controlled to adjust a current strength parameter of a high-frequency AC current output from the receiver-side resonant circuit, so that a first current strength parameter, which is a peak or an effective value of a current flowing through a transmitting coil, and a second strength parameter, which is a peak or an effective value of a current flowing through a receiving coil, have a predetermined relationship, and a load impendence of an equivalent load is adjusted, and thus system efficiency is optimized.
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Citations
10 Claims
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1. A resonance-type contactless power supply comprising:
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a power transmitter, comprising; an AC current generating circuit configured to generate an AC current having a first current strength parameter; a transmitter-side resonant circuit comprising a transmitting coil for receiving said AC current and transmitting electric energy; and a transmitter-side control circuit configured to obtain a first signal representing said first current strength parameter and a number of power receivers being coupled to said transmitter-side resonant circuit, and to transfer them wirelessly; at least one power receiver, comprising; a receiver-side resonant circuit comprising a receiving coil which is separated from but coupled to said transmitting coil in a contactless manner, and configured to receive electric energy from said transmitting coil; a rectifier circuit being coupled to said receiver-side resonant circuit; a power converter being coupled to said rectifier circuit; and a receiver-side control circuit configured to regulate said power converter for maintaining a second current strength parameter to be m times larger than said first current parameter, wherein - View Dependent Claims (2, 3, 4)
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5. A power receiver being coupled to a power transmitter in a contactless manner and configured to receive electric energy, comprising:
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a receiver-side resonant circuit comprising a receiving coil which is separated from but coupled to a transmitting coil of said power transmitter in a contactless manner, and configured to receive electric energy from said transmitting coil; a rectifier circuit being coupled to said receiver-side resonant circuit; a power converter being coupled to said rectifier circuit; and a receiver-side control circuit configured to regulate said power converter for maintaining a second current strength parameter to be m times larger than said first current parameter, wherein - View Dependent Claims (6, 7)
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8. A control method for controlling a resonance-type contactless power supply which comprises a power transmitter having a transmitting coil and at least one power receiver having a receiving coil and a power converter, comprising:
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regulating said power converter for maintaining a second current strength parameter to be m times larger than said first current parameter; wherein - View Dependent Claims (9, 10)
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Specification