Wireless power feeding system and wireless power feeding method
First Claim
1. A wireless power feeding system comprising:
- a wireless power feeding device comprising;
a power feeding device transmission/reception circuit portion; and
a signal processing circuit portion having a resonant frequency detection function and a power transmission control function;
a wireless power receiver comprising;
a power receiver transmission/reception circuit portion;
a signal processing circuit portion; and
a power storage portion comprising a secondary battery,wherein the wireless power feeding device is configured to;
receive a detection signal transmitted by the power receiver, the detection signal comprising a plurality of signals each having a different frequency;
determining a resonant frequency of the power receiver based on the detection signal;
adjust a frequency of a power signal to be transmitted by the power feeding device to the power receiver, based on the resonant frequency of the power receiver; and
transmit the power signal to the power receiver; and
wherein the wireless power receiver is configured to;
transmit the detection signal comprising the plurality of signals each having a different frequency to the power feeding device;
receive the power signal having a frequency adjusted to the resonant frequency of the wireless power receiver; and
store power of the power signal in the secondary battery of the power storage portion.
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Accused Products
Abstract
An object is to provide a power feeding system and a power feeding method which are more convenient for a power feeding user at the power receiving end. An object is to provide a power feeding system and a power feeding method which also allow a power feeding provider (a company) which feeds power (at the power transmitting end) to supply power without waste. A power feeding device which wirelessly supplies power to a power receiver detects the position and the resonant frequency of the power receiver to be supplied with power, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. An efficient power feeding service can be offered by transmitting a power signal to the power receiver at an optimum frequency for high power transmission efficiency.
42 Citations
28 Claims
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1. A wireless power feeding system comprising:
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a wireless power feeding device comprising; a power feeding device transmission/reception circuit portion; and a signal processing circuit portion having a resonant frequency detection function and a power transmission control function; a wireless power receiver comprising; a power receiver transmission/reception circuit portion; a signal processing circuit portion; and a power storage portion comprising a secondary battery, wherein the wireless power feeding device is configured to; receive a detection signal transmitted by the power receiver, the detection signal comprising a plurality of signals each having a different frequency; determining a resonant frequency of the power receiver based on the detection signal; adjust a frequency of a power signal to be transmitted by the power feeding device to the power receiver, based on the resonant frequency of the power receiver; and transmit the power signal to the power receiver; and wherein the wireless power receiver is configured to; transmit the detection signal comprising the plurality of signals each having a different frequency to the power feeding device; receive the power signal having a frequency adjusted to the resonant frequency of the wireless power receiver; and store power of the power signal in the secondary battery of the power storage portion. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless power receiver comprising:
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a transmission/reception circuit portion; a signal processing circuit portion; and a power storage portion comprising a secondary battery, wherein the wireless power receiver is configured to; emit a detection signal apt to allow a power feeding device to detect a resonant frequency of the power receiver, the detection signal comprising a plurality of signals each having a different frequency; receive a power signal having a frequency adjusted to a resonant frequency of the wireless power receiver determined from the detection signal; and store power transmitted by the power signal in the secondary battery of the power storage portion. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A wireless power feeding device comprising:
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a transmission/reception circuit portion; a signal processing circuit portion having a resonant frequency detection function and a power transmission control function; and a power supply portion, wherein the wireless power feeding device is configured to; receive a detection signal transmitted by a power receiver, the detection signal comprising a plurality of signals each having a different frequency; determine a resonant frequency of the power receiver based on the detection signal; adjust a frequency of a power signal to be emitted by the power feeding device, based on the resonant frequency; and emit the power signal. - View Dependent Claims (14, 15)
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16. A wireless power feeding method for a wireless power feeding system comprising the steps of:
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transmission of a detection signal by a power receiver to a power feeding device, the detection signal comprising a plurality of signals each having a different frequency; reception of the detection signal by the power feeding device; determination of a resonant frequency of the power receiver by the power feeding device, based on the detection signal; frequency adjustment of a power signal to be transmitted from the power feeding device to the power receiver, based on the resonant frequency; transmission of the power signal by the power feeding device to the power receiver; reception of the power signal by the power receiver; and storage of power transmitted by the power signal in a power storage portion of the power receiver. - View Dependent Claims (17, 18, 19, 20)
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21. A wireless power feeding method for a wireless power receiver comprising the steps of:
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emission of a detection signal apt to allow a power feeding device to detect a resonant frequency of the power receiver by the power receiver, the detection signal comprising a plurality of signals each having a different frequency; reception of a power signal having a frequency adjusted to a resonant frequency of the power receiver; and storage of power transmitted by the power signal in a power storage portion of the power receiver. - View Dependent Claims (22, 23, 24, 25)
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26. A wireless power feeding method for a wireless power feeding device comprising the steps of:
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reception of a detection signal emitted by a power receiver by the power feeding device, the detection signal comprising a plurality of signals each having a different frequency; detection of a resonant frequency by the power feeding device, based on the detection signal; frequency adjustment of a power signal to be emitted by the power feeding device, based on the resonant frequency; and emission of the power signal. - View Dependent Claims (27, 28)
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Specification