Wireless power feeder, wireless power receiver, and wireless power transmission system
First Claim
1. A wireless power feeder that wirelessly feeds power from a feeding coil to a moving object including a receiving coil, comprising:
- a plurality of feeding coils arranged along a moving direction of the moving object; and
a power supply circuit supplying AC power to the plurality of feeding coils, whereinthe power supply circuit makes a first feeding coil supply AC power to the moving object when the moving object passes through the first feeding coil and preparing power feeding from a second feeding coil through which the moving object has not passed,the power supply circuit includes a first power transmission control circuit supplying AC power to the first feeding coil and a second power transmission control circuit supplying AC power to the second feeding coil,the first power transmission control circuit transmits a power feeding request signal to the second power transmission control circuit when supplying AC power to the first feeding coil,the second power transmission control circuit enters a power feeding standby state to prepare power feeding from the second feeding coil when receiving the power feeding request signal,the first power transmission control circuit transmits a power feeding condition of the first feeding coil to the second power transmission control circuit, andthe second power transmission control circuit supplies AC power to the second feeding coil according to the power feeding condition.
3 Assignments
0 Petitions
Accused Products
Abstract
To increase efficiency of wireless power feeding to a moving object in wireless power feeding. A wireless power feeder 116 feeds power by wireless from a plurality of feeding coils L2 to an EV 108 including a receiving coil L3. The feeding coils L2 are arranged along a moving direction of the EV 108 and receive power from a power supply circuit including a plurality of power transmission control circuits 200. The power supply circuit 102 makes a first feeding coil L2 supply AC power to the EV 108 when the EV 108 passes through the first feeding coil L2 and, at the same time, prepares power feeding from a second feeding coil L2 through which the EV 108 has not passed.
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Citations
13 Claims
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1. A wireless power feeder that wirelessly feeds power from a feeding coil to a moving object including a receiving coil, comprising:
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a plurality of feeding coils arranged along a moving direction of the moving object; and a power supply circuit supplying AC power to the plurality of feeding coils, wherein the power supply circuit makes a first feeding coil supply AC power to the moving object when the moving object passes through the first feeding coil and preparing power feeding from a second feeding coil through which the moving object has not passed, the power supply circuit includes a first power transmission control circuit supplying AC power to the first feeding coil and a second power transmission control circuit supplying AC power to the second feeding coil, the first power transmission control circuit transmits a power feeding request signal to the second power transmission control circuit when supplying AC power to the first feeding coil, the second power transmission control circuit enters a power feeding standby state to prepare power feeding from the second feeding coil when receiving the power feeding request signal, the first power transmission control circuit transmits a power feeding condition of the first feeding coil to the second power transmission control circuit, and the second power transmission control circuit supplies AC power to the second feeding coil according to the power feeding condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power receiver which is a moving object that receives, at a receiving coil, AC power wirelessly fed from a feeding coil of a wireless power feeder, comprising:
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a receiving coil; a loading coil magnetically coupled to the receiving coil and receiving the AC power that the receiving coil has received from the feeding coil; and a signal transmitting unit transmitting, while the wireless power receiver is receiving power from a first feeding coil of a plurality of feeding coils arranged along a moving direction thereof, a power feeding request signal for requesting power feeding to a second feeding coil located next to the first feeding coil, wherein the signal transmitting unit transmits a power feeding condition to the second feeding coil. - View Dependent Claims (9, 10, 11)
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12. A wireless power transmission system for wirelessly feeding power from a feeding coil to a moving object including a receiving coil, comprising:
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a wireless power feeder; and a wireless power receiver formed as the moving object, wherein the wireless power feeder includes a plurality of feeding coils arranged along a moving direction of the moving object and a power supply circuit supplying AC power to the plurality of feeding coils, the wireless power receiver includes a receiving coil and a loading coil magnetically coupled to the receiving coil and receiving the AC power that the receiving coil has received from the feeding coil, the power supply circuit makes a first feeding coil supply AC power to the moving object when the moving object passes through the first feeding coil and preparing power feeding from a second feeding coil through which the moving object has not passed, the power supply circuit includes a first power transmission control circuit supplying AC power to the first feeding coil and a second power transmission control circuit supplying AC power to the second feeding coil, the first power transmission control circuit transmits the power feeding request signal to the second power transmission control circuit when supplying AC power to the first feeding coil, the second power transmission control circuit enters a power feeding standby state to prepare power feeding from the second feeding coil when receiving the power feeding request signal, the first power transmission control circuit transmits a power feeding condition of the first feeding coil to the second power transmission control circuit, and the second power transmission control circuit supplies AC power to the second feeding coil according to the power feeding condition. - View Dependent Claims (13)
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Specification