感应耦合电能传输系统不同补偿拓扑的研究

Investigation on Different Compensation Topologies in Inductively Coupled Power Transfer System

比较了感应耦合电能传输(ICPT)系统的拓扑。讨论了ICPT系统中几种不同的补偿形式,包括单谐振补偿和多谐振补偿拓扑,并推导出匝比为1时每种拓扑的电压电流增益。为了最小化器件的电压电流应力和优化参数设计,介绍了谐振电路功率因数的概念。由分析结果及得到的曲线图可知,在单谐振补偿拓扑中,一次侧串联补偿与其余几种相比更能抵消漏感的影响。而几种多谐振补偿拓扑的效果则明显优于单谐振补偿拓扑。分析和比较了不同参数变化时的特性曲线,以便于进行电路设计。最后以一次、二次侧都进行并联补偿的一种电流型ICPT电路为例进行实验验证,以说明实际系统的性能。

Different compensation topologies of the inductively coupled power transfer （ICPT） system is compared in this paper; and topology selection evolved in the design procedure is investigated. Two types of compensation topologies--single-resonant compensation and multi- resonant compensation are discussed, respectively. To minimize the VA rating of switches and to optimize the parameter design, the concept of power factor in resonant converter is introduced. Voltage and current gain are obtained in each case when the turns ratio is assumed to be 1. Compared to other single compensation topologies, series compensation on primary side is more effective to ,nullify the leakage inductance. And compensation on both primary and secondary sides will obtain a much higher power factor than compensation on only one side. Characteristic curves vs. variation of different parameters are compared and analyzed, which is helpful in the circuit design. One of the discussed topologies is constructed as an example to verify the analysis and to demonstrate the performance of a practical system.