Overvoltage protection system for wireless power transfer systems
First Claim
1. A wireless power transfer overvoltage protection system comprising:
- a resonant receiving circuit comprising, an inductor, a resonant capacitor and a first switching device, the inductor having a first end and a second end, the first switching device being connected between the first end and the second end of the inductor, the resonant receiving circuit being connected to a rectifier and a filter capacitor, the first switching device having a first state in which the first end and the second end of the inductor are electrically coupled to each other through the first switching device, and a second state in which the inductor and resonant capacitor are capable of resonating; and
a control module configured to control the first switching device to switching between the first state and the second state when the resonant receiving circuit is charging a load and a preset condition is satisfied and otherwise, the first switching device is maintained in the first state.
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Accused Products
Abstract
A wireless power transfer overvoltage protection system is provided. The system includes a resonant receiving circuit. The resonant receiving circuit includes an inductor, a resonant capacitor and a first switching device. The first switching device is connected the ends of the inductor. The first switching device has a first state in which the ends of the inductor are electrically coupled to each other through the first switching device, and a second state in which the inductor and resonant capacitor are capable of resonating. The system further includes a control module configured to control the first switching device to switching between the first state and the second state when the resonant receiving circuit is charging a load and a preset condition is satisfied and otherwise, the first switching device is maintained in the first state.
17 Citations
20 Claims
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1. A wireless power transfer overvoltage protection system comprising:
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a resonant receiving circuit comprising, an inductor, a resonant capacitor and a first switching device, the inductor having a first end and a second end, the first switching device being connected between the first end and the second end of the inductor, the resonant receiving circuit being connected to a rectifier and a filter capacitor, the first switching device having a first state in which the first end and the second end of the inductor are electrically coupled to each other through the first switching device, and a second state in which the inductor and resonant capacitor are capable of resonating; and a control module configured to control the first switching device to switching between the first state and the second state when the resonant receiving circuit is charging a load and a preset condition is satisfied and otherwise, the first switching device is maintained in the first state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A battery charging system for a vehicle comprising:
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a wireless power transfer circuit including an inverter and transmitting inductor and resonant capacitor configured to inductively provide power to a resonant receiving circuit; the resonant receiving circuit comprising, an inductor, a resonant capacitor and a first switching device, the inductor having a first end and a second end, the first switching device being connected between the first end and the second end of the inductor, the resonant receiving circuit being connected to a rectifier and a filter capacitor, the first switching device having a first state in which the first end and the second end of the inductor are electrically coupled to each other through the first switching device, and a second state in which the inductor and resonant capacitor are capable of resonating; a battery coupled to the resonant receiving circuit for receiving power inductively provided to the resonant receiving circuit; and a control module configured to control the first switching device to switching between the first state and the second state when the resonant receiving circuit is charging load and a preset condition is satisfied and otherwise, the first switching device is maintained in the first state. - View Dependent Claims (17, 18, 19, 20)
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Specification