METHOD AND APPARATUS FOR TUNING A RESISTANCE AND REACTANCE OF A WIRELESS POWER TRANSMITTER TESTING UNIT
First Claim
1. An apparatus for testing an impedance range of a wireless power transmitter, comprising:
- an adjustable impedance circuit configurable to be connected to a power source;
a transformer coupled to the adjustable impedance circuit;
a sensing circuit configured to sense a parameter indicative of a parasitic impedance of the adjustable impedance circuit; and
a driver circuit configured to drive the transformer with a signal based on the sensed parameter that causes the transformer to apply a first voltage to the adjustable impedance circuit, the first voltage having a substantially same amplitude as a voltage drop caused by the parasitic impedance and being out of phase with the voltage drop.
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Accused Products
Abstract
An apparatus for testing an impedance range of a wireless power transmitter is provided. The apparatus comprises an adjustable impedance circuit configurable to be connected to a power source. The apparatus further comprises a transformer coupled the adjustable impedance circuit. The apparatus further comprises a sensing circuit configured to sense a parameter indicative of a parasitic impedance of the adjustable impedance circuit. The apparatus further comprises a driver circuit configured to drive the transformer with a signal based on the sensed parameter that causes the transformer to apply a first voltage to the adjustable impedance circuit. The first voltage has a substantially same amplitude as a voltage drop caused by the parasitic impedance. The second voltage is out of phase with the voltage drop. The sensed parameter is a current circulating in the adjustable impedance circuit or a voltage across at least a portion of the adjustable impedance circuit.
29 Citations
20 Claims
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1. An apparatus for testing an impedance range of a wireless power transmitter, comprising:
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an adjustable impedance circuit configurable to be connected to a power source; a transformer coupled to the adjustable impedance circuit; a sensing circuit configured to sense a parameter indicative of a parasitic impedance of the adjustable impedance circuit; and a driver circuit configured to drive the transformer with a signal based on the sensed parameter that causes the transformer to apply a first voltage to the adjustable impedance circuit, the first voltage having a substantially same amplitude as a voltage drop caused by the parasitic impedance and being out of phase with the voltage drop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for testing an impedance range of a wireless power transmitter, comprising:
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sensing a parameter indicative of a parasitic impedance of an adjustable impedance circuit configurable to be connected to a power source, and driving a transformer coupled to the adjustable impedance circuit with a signal based on the sensed parameter that causes the transformer to apply a first voltage to the adjustable impedance circuit, the first voltage having a substantially same amplitude as a voltage drop caused by the parasitic impedance and being out of phase with the voltage drop. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus for testing an impedance range of a wireless power transmitter, comprising:
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means for providing an adjustable impedance to a power source; means for sensing a parameter indicative of a parasitic impedance of the means for providing the adjustable impedance; and means for applying a first voltage to the means for providing the adjustable impedance based on the sensed parameter, the first voltage having a substantially same amplitude as a voltage drop caused by the parasitic impedance and being out of phase with the voltage drop. - View Dependent Claims (18, 19, 20)
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Specification