POWER RECEIVER, POWER SOURCE, AND WIRELESS POWER TRANSFER SYSTEM
First Claim
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1. A power receiver comprising:
- a power receiver coil configured to wirelessly receive power from a power source;
a secondary battery configured to be charged by power from the power receiver coil;
a load resistor;
a switch configured to selectively connect the power receiver coil to the secondary battery or the load resistor; and
a power receiver controller configured to control the switch in accordance with a power supply state of the power source based on the power receiver coil, and a charged state of the secondary battery.
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Abstract
A power receiver includes a power receiver coil, a secondary battery, a load resistor, a switch, and a power receiver controller. The power receiver coil is configured to wirelessly receive power from a power source, and the secondary battery is configured to be charged by power from the power receiver coil. The switch is configured to selectively connect the power receiver coil to the secondary battery or the load resistor, and the power receiver controller is configured to control the switch in accordance with a power supply state of the power source based on the power receiver coil, and a charged state of the secondary battery.
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Citations
17 Claims
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1. A power receiver comprising:
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a power receiver coil configured to wirelessly receive power from a power source; a secondary battery configured to be charged by power from the power receiver coil; a load resistor; a switch configured to selectively connect the power receiver coil to the secondary battery or the load resistor; and a power receiver controller configured to control the switch in accordance with a power supply state of the power source based on the power receiver coil, and a charged state of the secondary battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A power source including a power source coil configured to wirelessly transfer power to a plurality of power receivers, wherein
each of the power receivers comprises: -
a power receiver coil configured to wirelessly receive power from a power source; a secondary battery configured to be charged by power from the power receiver coil; a load resistor; a switch configured to selectively connect the power receiver coil to the secondary battery or the load resistor; and a power receiver controller configured to control the switch in accordance with a power supply state of the power source based on the power receiver coil, and a charged state of the secondary battery, and wherein the power source comprises; a power source controller configured to control conditions of a full power transfer so as to start the full power transfer after a first time from starting a test power transfer is started, and recognize a number of the power receivers to be charged in accordance with waveforms from the power source coil. - View Dependent Claims (15, 16)
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17. A wireless power transfer system comprising a power source and a plurality of power receivers wirelessly receiving power from the power source, wherein
each of the power receivers comprises: -
a power receiver coil configured to wirelessly receive power from a power source; a secondary battery configured to be charged by power from the power receiver coil; a load resistor; a switch configured to selectively connect the power receiver coil to the secondary battery or the load resistor; and a power receiver controller configured to control the switch in accordance with a power supply state of the power source based on the power receiver coil, and a charged state of the secondary battery, and wherein the power source comprises; a power source coil configured to wirelessly transfer power to the plurality of power receivers; and a power source controller configured to control conditions of a full power transfer so as to start the full power transfer after a first time from starting a test power transfer is started, and recognize a number of the power receivers to be charged in accordance with waveforms from the power source coil.
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Specification