VARIABLE CAPACITOR FOR RESONANT POWER TRANSFER SYSTEMS

摘要

Systems and designs for tuning a wireless power transfer system are provided, which may include any number of features. In one embodiment, a wireless power transfer system can include first and second switched capacitor circuits electrically connected to opposite poles of the inductor of a resonator in the wireless power system. The first and second switched capacitor circuits can be switched on and off with MOSFETS to change a capacitance of the circuits, and thus an effective capacitance of the resonator. Methods of use are also provided.

主权项

1. A resonator of a wireless power transfer system, comprising:
an inductor adapted to receive or transmit wireless power; first and second switched capacitor circuits electrically connected to opposite poles of the inductor, each of the first and second switched capacitor circuits comprising a first capacitor in series with a MOSFET and a second capacitor in parallel with the first capacitor; and a controller electrically connected to the first and second switched capacitor circuits, the controller configured to switch the MOSFETS on and off to change a capacitance of the first and second switched capacitor circuits to adjust an effective capacitance of the resonator.