Parameters Optimization of Electric Vehicles Dynamic Wireless Power Transfer System Based on LCC-S Compensation Topology

doi:10.3901/JME.2021.14.150

Abstract

Abstract: An optimal design procedure for LCC-S (series) compensation network based on weighted average efficiency is proposed aiming at the problem that the coupling coefficient of the electric vehicles (EVs) dynamic wireless power transfer (DWPT) system will change randomly with the lateral misalignment of the vehicles, which will cause the decrease in system output power and efficiency. Based on the statistic characteristics of vehicle lateral misalignment in motion, a weight distribution method referring to the normal distribution principle is proposed. This method considers the system efficiency under the conditions of high, medium and low coupling to achieve high efficiency, so that the optimized topology parameters can well adapt to the actual working characteristics of DWPT systems. A prototype is implemented based on the optimized parameters. Simulation and experimental results indicate that the proposed method can improve the system output power and efficiency compared with the TWAE (Time-weighted average efficiency) method.

Key words: dynamic wireless power transfer, parameters optimization, LCC-S compensation topology, weighted average efficiency, electric vehicles

CLC Number:

TG156

TIAN Yong, ZHU Ze, TIAN Jindong, XIANG Lijuan. Parameters Optimization of Electric Vehicles Dynamic Wireless Power Transfer System Based on LCC-S Compensation Topology[J]. Journal of Mechanical Engineering, 2021, 57(14): 150-159.

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