Wireless power transmitter, wireless power receiver and impedence control method
First Claim
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1. A wireless power transmitter which wirelessly transmits power through a wireless power receiver to a load side, the wireless power transmitter comprising:
- a power source for generating AC power;
a transmission coil for wirelessly transferring the AC power to a reception coil included in the wireless power receiver; and
a detecting unit for detecting a coupling state between the transmission coil and the reception coil,wherein the detecting unit measures a first input impedance seen by the power source to the wireless power transmitter after opening the load side and detects the coupling state based on the measured first input impedance.
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Abstract
Disclosed is a wireless power transmitter which transmits power through a wireless power receiver to a load side. The wireless power transmitter includes a power source for generating AC power; a transmission coil for wirelessly transmitting the AC power to a reception coil of the wireless power receiver; and a detecting unit for detecting a coupling state between the transmission coil and the reception coil.
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14 Claims
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1. A wireless power transmitter which wirelessly transmits power through a wireless power receiver to a load side, the wireless power transmitter comprising:
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a power source for generating AC power; a transmission coil for wirelessly transferring the AC power to a reception coil included in the wireless power receiver; and a detecting unit for detecting a coupling state between the transmission coil and the reception coil, wherein the detecting unit measures a first input impedance seen by the power source to the wireless power transmitter after opening the load side and detects the coupling state based on the measured first input impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An impedance control method of a wireless power transmitting system for controlling an impedance of a load side, the impedance control method comprising:
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detecting a coupling state between a wireless power transmitter and a wireless power receiver; transmitting information about the coupling state to the wireless power receiver; determining the impedance of the load side based on the information about the coupling state; and controlling the impedance of the load side according to the determined impedance, wherein the detecting a coupling state includes measuring a first input impedance seen by a power source to the wireless power transmitter after opening the load side and detecting the coupling state based on the measured first input impedance. - View Dependent Claims (12, 13, 14)
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Specification