中国电机工程学报2025，Vol.45Issue(4)：1610-1622,中插32,14.DOI:10.13334/j.0258-8013.pcsee.232079
具有宽范围负载能力双向E#型WPT系统研究
Research on Bidirectional Class E#Type WPT System With Wide Load Range Capability
摘要
Abstract
Traditional bi-directional class E wireless power transfer circuits are prone to hard switching states,resulting in low power transfer efficiency.To solve this problem,this paper proposes an improved Class E#circuit topology and its phase-shifting control strategy.Firstly,the mathematical model of the E#circuit topology with a wider applicable load range for a zero-voltage switching state is designed.The key variables and constraints for the circuit to realize the zero-voltage switching state(ZVS)are analyzed and extracted,theoretically proving the effectiveness of the proposed topology.Then,the analytical relationships of the coil mutual inductance and load impedance in the circuit are derived.Based on this,a phase-shifting control strategy is proposed to guarantee that the system operates at the optimal states under different loads.By controlling the phase of the gate drive signal of the switching devices,the energy stored inside the resonant elements can be released in advance or with delay,thus correcting the switching devices back to a ZVS state.Finally,the effectiveness of the proposed bi-directional Class E#circuit is verified via simulation and experiments.Numerical results demonstrate that the proposed method guarantees a circuit ZVS state within a load range of 5～30 Ω,and the peak power transfer efficiency reaches 84.3%.关键词
双向无线电能传输/E#型电路拓扑/零电压开关/移相控制Key words
bi-directional wireless power transfer(BD-WPT)/class E#type circuit/zero-voltage switching/phase-shift control分类
信息技术与安全科学引用本文复制引用
张信,杨奕,包诗媛,张路,陈诗雨..具有宽范围负载能力双向E#型WPT系统研究[J].中国电机工程学报,2025,45(4):1610-1622,中插32,14.基金项目
国家自然科学基金项目(52207004) （52207004）
重庆市教委科技研究项目(KJQN202201103). Project Supported by National Natural Science Foundation of China(52207004) （KJQN202201103）
Science and Technology Research Project of Chongqing Education Commission(KJQN202201103). （KJQN202201103）
