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;
a resonance frequency specifying unit that specifies a plurality of resonance frequencies, based on the frequency characteristics; and
a power supply controller that determines whether or not to supply power to the power reception coil, based on a frequency difference between the plurality of resonance frequencies.
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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.
21 Citations
13 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; a resonance frequency specifying unit that specifies a plurality of resonance frequencies, based on the frequency characteristics; and a power supply controller that determines whether or not to supply power to the power reception coil, based on a frequency difference between the plurality of resonance frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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; a resonance frequency specifying unit that specifies a resonance frequency based on the frequency characteristics; and a power supply permission determination unit that determines whether or not to permit power supply from the power supply coil to the power reception coil, based on a frequency difference between the resonance frequencies.
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12. A power feed method of supplying power to an external power reception coil, by using electromagnetic action, the power feed method comprising:
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a power supplying step of supplying power to a power supply coil by using the electromagnetic action; a frequency characteristic acquisition step of acquiring frequency characteristics associated with the power supply coil to which power is supplied; a resonance frequency specifying step of specifying a resonance frequency, based on the acquired frequency characteristics; and a determination step of determining whether or not to supply power to the power reception coil, based on a frequency difference between the resonance frequencies. - View Dependent Claims (13)
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Specification