一种感应加热电源频率跟踪控制系统  

A Control System of Frequency-Tracking for Induction Heating Power Supply

作　　者：李劲伟[1] 梁文林[1] 

机构地区：[1]河南科技大学电子信息工程学院,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2003年第2期75-78,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省自然科学基金资助项目 (9840 60 60 0 )

摘　　要：针对感应加热电源中负载回路谐振频率时变的特点 ,在以IGBT为功率开关的 2kW感应加热电源中 ,设计并实现了一种频率跟踪控制系统。该系统通过Hall电流传感器、电压比较器和CD4 0 4 6锁相环对负载电流实现了频率跟踪 ,使逆变器工作在功率因数接近于 1的准谐振状态。通过试验验证 ,电路简单可靠 。In the light of temporal variability of loads circuit resonant frequency in induction heating power supply,a control system of frequency-tracking in a 2kW induction heating power supply is devised using IGBT as power switch. The frequency-tracking of load current is implemented by the current transducer Hall,voltage comparator and CD4046. The inverter operates at the quasi-resonant condition that the power factor is nearly equal to unity. By test validation, the circuit is simple and reliable, and runs well.

关 键 词：感应加热电源 频率跟踪 控制系统 锁相环路 IGBT 谐振频率 控制电路 电流传感器 电压比较器 逆变器 

分 类 号：TM924.01[电气工程—电力电子与电力传动] TM464