Wireless power feeder and wireless power feeding method
First Claim
1. A wireless power feeder, comprising:
- a power transmission coil that feeds power to a power reception coil provided with a power receiving device; and
a controller that determines power transmitted to the power transmission coil based on a change of a slope of at least one of actual transmitted power and reactive power, whereinthe actual transmitted power is transmitted from the power transmission coil to the power reception coil, andthe reactive power is not transmitted from the power transmission coil to the power reception coil.
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Abstract
A non-contact power feeder includes a plurality of power transmission coils disposed along a disposition surface, wherein a power receiving device that houses a power reception coil is disposed on the disposition surface, and a controller that determines a first traveling wave power, from among a plurality of traveling wave powers, that feeds the power transmission coil corresponding to the power receiving device based on a state of change of at least one of: actual transmitted power, from the plurality of traveling wave powers, transmitted from the plurality of power transmission coils to the power reception coil when power transmitted to the plurality of power transmission coils is changed, and reactive power, from the plurality of traveling wave powers, not transmitted from the power transmission coil to the power reception coil when the power transmitted to the plurality of power transmission coils is changed.
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Citations
18 Claims
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1. A wireless power feeder, comprising:
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a power transmission coil that feeds power to a power reception coil provided with a power receiving device; and a controller that determines power transmitted to the power transmission coil based on a change of a slope of at least one of actual transmitted power and reactive power, wherein the actual transmitted power is transmitted from the power transmission coil to the power reception coil, and the reactive power is not transmitted from the power transmission coil to the power reception coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power feeding method for a wireless power feeder comprising a plurality of power transmission coils disposed along a disposition surface and a controller, a power receiving device that houses a power reception coil being disposed on the disposition surface, the method comprising:
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changing, with the controller, a traveling wave power that is transmitted to the power transmission coils corresponding to the power receiving device; and determining, with the controller, a first traveling wave power, from the changed traveling wave power, based on a state of change of a change amount of at least one of actual transmitted power and reactive power relative to a changed amount of the changed traveling wave power, feeding, with the controller, the determined first traveling wave power to a power transmission coil corresponding to the power receiving device, wherein the actual transmitted power is transmitted from the plurality of power transmission coils to the power reception coil, and the reactive power is not transmitted from the power transmission coil to the power reception coil. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification