Noise reducing power feed device, power reception device and power feed method
First Claim
1. A power feed device that supplies power to an external power reception coil, by using electromagnetic action, the power feed device comprising:
- a power supply coil that supplies power by using the electromagnetic action;
a frequency characteristic acquisition unit that acquires frequency characteristics associated with the power supply coil; and
a resonance frequency specifying unit that specifies a plurality of resonance frequencies, based on the frequency characteristics,wherein the external power reception coil is configured to be mounted on a vehicle,wherein the power feed device is configured to supply power to a storage battery mounted on the vehicle via the external power reception coil,wherein the power feed device acquires a residual capacity of the storage battery from the vehicle, calculates a first frequency difference between the plurality of the resonance frequencies, and corrects the first frequency difference to a second frequency difference based on the residual capacity of the storage battery, andwherein the power feed device determines whether or not to supply power to the power reception coil, based on the second frequency difference corrected from the first frequency difference.
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Accused Products
Abstract
Power feed device (100) supplies power to storage battery (152) mounted on vehicle (150), through power receiving unit (154) of vehicle (150). Power supply unit (104) performs preliminary supply to power receiving unit (154) while sequentially changing a frequency, and performs main supply with power larger than in the preliminary supply. Power supply-side controller (103) acquires frequency characteristics associated with power supply coil (104a), and specifies a resonance frequency based on the acquired frequency characteristics. Power supply-side controller (103) determines whether or not to supply power to power reception coil (154a) based on a frequency difference between resonance frequencies.
14 Citations
14 Claims
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1. A power feed device that supplies power to an external power reception coil, by using electromagnetic action, the power feed device comprising:
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a power supply coil that supplies power by using the electromagnetic action; a frequency characteristic acquisition unit that acquires frequency characteristics associated with the power supply coil; and a resonance frequency specifying unit that specifies a plurality of resonance frequencies, based on the frequency characteristics, wherein the external power reception coil is configured to be mounted on a vehicle, wherein the power feed device is configured to supply power to a storage battery mounted on the vehicle via the external power reception coil, wherein the power feed device acquires a residual capacity of the storage battery from the vehicle, calculates a first frequency difference between the plurality of the resonance frequencies, and corrects the first frequency difference to a second frequency difference based on the residual capacity of the storage battery, and wherein the power feed device determines whether or not to supply power to the power reception coil, based on the second frequency difference corrected from the first frequency difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power reception device to which power is supplied from an external power supply coil, by using electromagnetic action, the power reception device comprising:
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a power reception coil to which power is supplied from the power supply coil by using the electromagnetic action; a frequency characteristic acquisition unit that acquires frequency characteristics of power supply efficiency between the power supply coil and the power reception coil; and a resonance frequency specifying unit that specifies a plurality of resonance frequencies based on the frequency characteristics, wherein the power reception device is configured to be mounted on a vehicle, wherein the power reception coil is configured to supply power to a storage battery mounted on the vehicle, wherein the power reception device acquires a residual capacity of the storage battery from the vehicle, calculates a first frequency difference between the plurality of the resonance frequencies, and corrects the first frequency difference to a second frequency difference based on the residual capacity of the storage battery, and wherein the power reception device determines whether or not to supply power to the power reception coil, based on the second frequency difference corrected from the first frequency difference. - View Dependent Claims (11)
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12. A power feed method for a power feed device that supplies power to an external power reception coil, by using electromagnetic action, the power feed device comprising:
- a power supply coil that supplies power by using the electromagnetic action;
a frequency characteristic acquisition unit that acquires frequency characteristics associated with the power supply coil; and
a resonance frequency specifying unit that specifies a plurality of resonance frequencies, based on the frequency characteristics, the external power reception coil configured to be mounted on a vehicle, the power feed device configured to supply power to a storage battery mounted on the vehicle via the external power reception coil,wherein the power feed device acquires a residual capacity of the storage battery from the vehicle, calculates a first frequency difference between the plurality of the resonance frequencies, and corrects the first frequency difference to a second frequency difference based on the residual capacity of the storage battery, and the power feed device determines whether or not to supply power to the power reception coil, based on the second frequency difference corrected from the first frequency difference. - View Dependent Claims (13, 14)
- a power supply coil that supplies power by using the electromagnetic action;
Specification