中国电机工程学报2024，Vol.44Issue(8)：3224-3234,中插24,12.DOI:10.13334/j.0258-8013.pcsee.230234
轻载工况下基于效率优化的双向无线电能传输系统半桥调制策略
Half-bridge Modulation Strategy for Bidirectional Wireless Power Transmission System Based on Efficiency Optimization Under Light Load Conditions
摘要
Abstract
Aiming at the problem that the power factor and efficiency of the modulation strategy of bidirectional dual LCC wireless charging system based on full bridge topology decrease seriously under light load conditions,this paper proposes a half-bridge modulation strategy on the basis of not changing the full bridge structure.Firstly,the on state efficiency of the bidirectional double LCC compensation circuit is modeled,and the key variables and constraints affecting the efficiency are analyzed quantitatively,thus providing a theoretical basis for the optimization of modulation strategies;On this basis,the paper analyzes the working principle of the proposed two-sided half bridge modulation strategy,the optimization relationship of the positive conduction angle and the realization conditions of soft switching in detail,and proves that the strategy can significantly reduce the external shift phase angle while ensuring the zero voltage switching(ZVS)of the switching device,thus effectively improving the power factor and operating efficiency of the system;Finally,A 3.3 kW bidirectional wireless power transfer(BD-WPT)system prototype is built for comparative experiments.The experimental results show that the half bridge modulation strategy proposed in this paper can achieve the highest efficiency of 95.6%under light load conditions of 1/4 full load and below,and can achieve significant optimization effect when the output voltage changes in a wide range.关键词
双向无线电能传输/软开关/双LCC/效率优化/半桥调制Key words
bidirectional wireless power transfer(BD-WPT)/soft switching/dual LCC/efficiency optimization/half-bridge modulation分类
信息技术与安全科学引用本文复制引用
王付胜,杨金涛,范政,周梦豪,王涵宇,李飞..轻载工况下基于效率优化的双向无线电能传输系统半桥调制策略[J].中国电机工程学报,2024,44(8):3224-3234,中插24,12.基金项目
高等学校学科创新引智计划(BP0719039). Overseas Expertise Introduction Project for Discipline Innovation(BP0719039). （BP0719039）
