Wireless power feeding apparatus, vehicle, and method of controlling wireless power feeding system
First Claim
1. A wireless power feeding apparatus for feeding power in a contactless manner to a power reception device including a power reception unit, comprising:
- a power transmission unit for transmitting power to said power reception unit;
an estimation unit for estimating a positional mismatch amount of said power reception unit relative to said power transmission unit, based on a power receiving state of said power reception device and reflected power in the wireless power feeding apparatus, by using a relation obtained in advance between the power receiving state and the reflected power, and the positional mismatch amount, wherein the positional mismatch amount is estimated using a map indicative a the relation between (i) the power receiving state and the reflected power and (ii) the positional mismatch amount;
a detection device for detecting said reflected power; and
a sensor for detecting the power receiving state in the power reception device.
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Accused Products
Abstract
A power supply device generates power having a prescribed frequency. A primary self-resonant coil transmits the power in a contactless manner to a secondary self-resonant coil by resonating with the secondary self-resonant coil through an electromagnetic field. A power sensor detects reflected power to the power supply device. A communication device receives a power receiving state of a vehicle. An ECU estimates a positional mismatch amount of the secondary self-resonant coil relative to the primary self-resonant coil based on the power receiving state of the vehicle and the reflected power, by using relation obtained in advance between the power receiving state and the reflected power, and the positional mismatch amount.
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Citations
12 Claims
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1. A wireless power feeding apparatus for feeding power in a contactless manner to a power reception device including a power reception unit, comprising:
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a power transmission unit for transmitting power to said power reception unit; an estimation unit for estimating a positional mismatch amount of said power reception unit relative to said power transmission unit, based on a power receiving state of said power reception device and reflected power in the wireless power feeding apparatus, by using a relation obtained in advance between the power receiving state and the reflected power, and the positional mismatch amount, wherein the positional mismatch amount is estimated using a map indicative a the relation between (i) the power receiving state and the reflected power and (ii) the positional mismatch amount; a detection device for detecting said reflected power; and a sensor for detecting the power receiving state in the power reception device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vehicle capable of receiving power in a contactless manner from a power feeding apparatus including a power transmission unit, comprising:
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a power reception unit for receiving power in a contactless manner from said power transmission unit; an estimation unit for estimating a positional mismatch amount of said power reception unit relative to said power transmission unit, based on a power receiving state of said power reception device and reflected power in said power feeding apparatus, by using a relation obtained in advance between the power receiving state and the reflected power, and the positional mismatch amount, wherein the positional mismatch amount is estimated using a map indicative of the relation between (i) the power receiving state and the reflected power and (ii) the positional mismatch amount; a detection device for detecting said reflected power; and a sensor for detecting the power receiving state in the power reception device.
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12. A method of controlling a wireless power feeding system for feeding power in a contactless manner from a power feeding apparatus to a power reception device,
said power feeding apparatus including a power transmission unit for transmitting power to said power reception device, said power reception device including a power reception unit for receiving the power in a contactless manner from said power transmission unit, said method comprising the steps of: -
detecting reflected power in said power feeding apparatus with a detection device; detecting a power receiving state of said power reception device with a sensor; and estimating a positional mismatch amount of said power transmission unit relative to said power reception unit, based on said reflected power and said power receiving state, by using a relation obtained in advance between the power receiving state and the reflected power, and the positional mismatch amount, wherein the positional mismatch amount is estimated using a map indicative of the relation between (i) the power receiving state and the reflected power and (ii) the positional mismatch amount.
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Specification