WIRELESS CHARGING SYSTEM AND METHOD
First Claim
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1. A wireless charging system, comprising:
- matching circuitry operatively coupled to a transmission coil having a load inductance, the matching circuitry having a capacitance value; and
a controller operatively coupled to the matching circuitry and configured to control the matching circuitry to adjust a voltage associated with the capacitance value based on the load inductance to cause the voltage associated with the capacitance value to be in phase with a current associated with the capacitance value.
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Abstract
A wireless charging system and a method for tuning the wireless charging system is described. The system can include matching circuitry coupled to a transmission coil and a controller coupled to the matching circuitry. The transmission coil can have a load inductance. The controller can control the matching circuitry to adjust a voltage associated with the capacitance value based on the load inductance to cause the voltage associated with the capacitance value and a current associated with the capacitance value to be in phase.
5 Citations
24 Claims
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1. A wireless charging system, comprising:
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matching circuitry operatively coupled to a transmission coil having a load inductance, the matching circuitry having a capacitance value; and a controller operatively coupled to the matching circuitry and configured to control the matching circuitry to adjust a voltage associated with the capacitance value based on the load inductance to cause the voltage associated with the capacitance value to be in phase with a current associated with the capacitance value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless charging system, comprising:
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matching circuitry coupled to a transmission coil having a load inductance, the matching circuitry comprising; a capacitor having a capacitance value; and a switch coupled in parallel to the capacitor and configured to selectively short the capacitor to adjust a voltage across the capacitor; and a controller coupled to the switch of the matching circuitry, the controller being configured to control the switch to selectively short the capacitor to adjust an impedance of the wireless charging system based load inductance. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method to tune a wireless charging system, the method comprising:
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calculating a load inductance of the wireless charging system; and adjusting a voltage across a capacitor of the wireless charging system based on the load inductance to cause the voltage and a current associated with the capacitor to be in phase. - View Dependent Claims (21, 22, 23, 24)
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Specification