A Class E2 Inverter-Rectifier-Based Bidirectional Wireless Power Transfer System

Kerui Li, Siew-Chong Tan
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引用次数: 6

Abstract

In this paper, the use of class $\mathrm{E}^{2}$ inverter-rectifier (hereon known as $\mathrm{E}^{2}$ converter) system with phase-shift control for bidirectional wireless power transfer applications, is discussed. The system comprises a class E inverter, an active class E rectifier, and a set of wireless transmitter-receiver coils with series-series compensation. The power flow control of the system is achieved via the control of the phase-shift ratio between the driving signal of the inverter and that of the rectifier. To ensure zero voltage switching (ZVS) operation of the converter and precise power flow control over the full load range, the system is designed to be load-independent such that the voltage waveforms of the converter are relatively similar (slight change) regardless of the applied load. The operating principle, time-domain model, and design consideration of the system are elaborated in the paper. Simulation and experimental results are provided as preliminary verification of the derived time-domain model and the features of the system: load-independent output/input voltage waveform of the class E inverter and active class E rectifier over the full load range, ZVS operation over the full load range, providence of bidirectional and sustainable power flow control and accurate output regulation.
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一种基于E2级逆变整流的双向无线电力传输系统
本文讨论了带相移控制的$\mathrm{E}^{2}$逆变整流器(以下简称$\mathrm{E}^{2}$变换器)系统在双向无线电力传输中的应用。该系统由一个E类逆变器、一个有源E类整流器和一组串联补偿的无线收发线圈组成。系统的潮流控制是通过控制逆变器驱动信号与整流器驱动信号之间的相移比来实现的。为了确保变流器的零电压开关(ZVS)运行和在全负载范围内的精确潮流控制,系统被设计成与负载无关,因此无论施加的负载如何,变流器的电压波形都相对相似(略有变化)。本文阐述了该系统的工作原理、时域模型和设计考虑。仿真和实验结果初步验证了所建立的时域模型和系统的特点:E类逆变器和有源E类整流器在全负荷范围内的负载无关的输出/输入电压波形,全负荷范围内的ZVS运行,提供双向可持续的潮流控制和精确的输出调节。
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