LLC谐振高频逆变器新型移相控制研究  

A Novel Phase-shift Control Research of High Frequency Inverter With LLC Resonant Load

作　　者：孙瑞波 沈锦飞 

机构地区：[1]江南大学,江苏无锡214122

出　　处：《电力电子技术》2014年第7期16-18,共3页Power Electronics

基　　金：江苏省科技支撑计划项目(BE2013025)~~

摘　　要：针对在LLC谐振负载情况下,传统的移相控制方式在对逆变器进行移相调功时,移相臂的软开关较难以实现,从而会带来较大的开关损耗问题,在此提出采用恒频不对称电压消除法(AVC)的移相控制方式来进行调功,可使高频逆变器所有开关管都工作在零电压开关(ZVS)方式下,且最小开关频率大大降低,减少了开关损耗,提高了逆变器的效率。仿真和实验结果证明了该控制方式的可行性和可靠性。For the LLC resonant load, the traditional phase-shift control mode varies the output power by shifting the phase of the switch conduction sequences.Soft switching of phase-shift arm is difficult to achieve which will cause greater switching loss.This paper adopts the fixed-frequency asymmetrical voltage-cancellation （AVC） control method to regulate power.The minimum switching frequency to ensure inverter work on the zero-voltage switching（ZVS） is greatly reduced.The switching losses decreases, and improve the efficiency of the inverter.The feasibility and reliability of the method are verified by simulation and experimental results.

关 键 词：逆变器 移相控制 零电压开关 

分 类 号：TM464[电气工程—电器]