一种移相控制的无线输电系统效率优化方法  

An efficiency optimization method for wireless transmission system based on phase shift control

作　　者：霍兆镜 张健彬 徐锦清 岑长岸 李明 HUO Zhaojing;ZHANG Jianbin;XU Jinqing;CEN Changan;LI Ming(Guangdong Midea Refrigeration Equipment Co.,Ltd.Foshan 528315)

机构地区：[1]广东美的制冷设备有限公司,广东佛山528315

出　　处：《家电科技》2023年第2期98-102,共5页Journal of Appliance Science & Technology

摘　　要：为提升无线输电系统的效率,需使逆变电路尽可能工作在软开关状态以及工作频率尽可能靠近谐振点。基于上述原理,分析了逆变电路进入软开关状态的根本条件,并结合无线输电系统的无线传输效率特性得出了一种移相控制的无线输电系统效率优化方法。通过控制逆变电路的工作频率,使其工作在靠近无线输电系统谐振点的最大感抗点中,使电路在移相控制的控制方式下更加容易地进入软开关状态,从而减少开关损耗,提升了无线输电系统的工作效率。仿真结果表明了控制方法的正确性,最后采用一套650 W无线输电系统进行了试验验证,仿真以及试验结果均能使无线输电系统降低损耗2 W以上,表明该控制方法应用于无线输电系统能够提升系统效率。In order to improve the efficiency of wireless transmission system,it is necessary to make the inverter circuit work in the soft switching state as much as possible and the working frequency as close as possible to the resonant point.Based on the above principle,analyzes the basic conditions for the inverter to enter the soft switching state,and combines the wireless transmission efficiency characteristics of wireless transmission system to obtain a phase-shifting control efficiency optimization method of wireless transmission system.By controlling the working frequency of the inverter circuit,it can work in the maximum inductive reactance point close to the resonant point of the wireless transmission system,so that the circuit can enter the soft switching state more easily under the control mode of phase shift control,so as to reduce the switching loss and improve the working efficiency of the wireless transmission system.The simulation results show that the control method is correct.Finally,a 650W wireless transmission system is used for experimental verifi cation.The simulation and test results can reduce the loss of the wireless transmission system by more than 2 W,indicating that the control method can improve the system efficiency when applied to the wireless transmission system.

关 键 词：全桥移相 无线输电 软开关 效率 

分 类 号：TN86[电子电信—信息与通信工程]