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Contactless power transfer is an emerging technology. It is widely used in industrial and consumer electronic products. In this paper, a bidirectional contactless power transfer system for wireless vehicle charger is presented based on quantum modulation method. By applying this novel amplitude modulation method, switching losses and electromagnetic noise are greatly reduced and the whole system efficiency increased as well. Firstly, the operational principle of the contactless power transfer system is reviewed. The frequency analysis of the contactless power transfer system based on series resonant converter is deduced in detail. Besides, the voltage gain and phase feature of resonant tank are shown. Then, the quantum method for bidirectional power flow is explained in detail. The controller framework based on a simple analogous circuit is analysed as well. In additional, a simulation of the bidirectional contactless power transfer system based on quantum modulation by computer is presented to demonstrate the effectiveness of this method. Then, the conclusion of contactless power transfer system of bidirectional power flow is given at the end.

A Bidirectional Contactless Power Transfer System Based on Quantum Modulation