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Double-Sided LCLC-Compensated Topology For Capacitive Power Transfer

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
A double-sided LCLC-compensated network is proposed for a capacitive power transfer (CPT) system. In one design, four metal plates are used to form two power transmitting and receiving capacitors and the LCLC network is used to compensate the capacitors. In the second design, two extra metal plates are used to couple with the previous four plates at the transmitting and receiving side, respectively, which forms the capacitor-integrated structure. The circuit parameter values are tuned to achieve zero voltage switching (ZVS) of the input side switches. There is also a CLLC topology proposed, which is a similar variation of LCLC circuit. A 3.3 kW input power capacitive power transfer prototype is designed and built. The experiment results show that the proposed CPT system can transfer 3.1 kW output power through an air gap distance of 70 mm with a dc-to-dc efficiency of 92.1%.
MI, Chris (Canton, MI), ZHANG, Hua (Westland, MI), LU, Fei (Westland, MI)
15/ 088,213
April 1, 2016
GOVERNMENT CLAUSE [0002] This invention was made with government support under Grant No. DE-EE0005565 awarded by the Department of Energy. The Government has certain rights in this invention.