定角控制高频MOSFET串联逆变器频率跟踪  

Frequency Tracking of Fixed Angle Controlled Series Connected High-frequency MOSFET Converter

作　　者：张智娟[1] 彭咏龙[2] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003 [2]华北电力大学电力工程系,河北保定071003

出　　处：《工业加热》2004年第4期25-27,共3页Industrial Heating

基　　金：华北电力大学青年教师基金资助项目(QN0303001)

摘　　要：针对采用功率MOSFET的高频串联型逆变电源,在分析其工作状态和传统锁相环对频率跟踪的基础上,提出了一种锁相电路与定角控制相结合的逆变器频率跟踪方法,实验结果表明该方法具有跟踪速度快,跟踪频率准确,保证逆变器始终工作在小感性状态,即逆变器始终工作在功率因数接近1的准谐振状态,从而提高了系统的功率因数,实现了MOSFET的软开关。With series connected converter and power MOSFETs as power switches,this paper introduces a new automatic tracking method of the converter's frequency using PLL and fixed angle control after analyzing the normal working state of the converter.The experiment results verify that the tracking rate is quick and exact and the converter is always working at a little-inductive state,that is the converter works under the quasi-resonance state that the power factor is close to 1.Experiments show that the method can make the power MOSFETs work at a soft switch state.

关 键 词：逆变器 频率跟踪 功率MOSFET 锁相环 谐振 

分 类 号：TM924[电气工程—电力电子与电力传动]