感应加热电源的容性移相PWM调功  

Capacitive Phase-shifted PWM Power Modulation of Induction Heating Power Supply

作　　者：孙起良[1] 张志宏[1,2] 

机构地区：[1]天津理工大学自动化学院天津市复杂系统控制理论及应用重点实验室,天津300384 [2]天津广播电视发展有限公司,天津300072

出　　处：《安徽理工大学学报（自然科学版）》2013年第1期33-37,46,共6页Journal of Anhui University of Science and Technology:Natural Science

基　　金：天津市科技计划重点资助项目(07ZHXPH01800)

摘　　要：针对IGBT关断时存在拖尾电流会产生较大关断损耗的问题,分析了负载容性状态下串联逆变器开关器件IGBT开通与关断的特性,并与负载谐振状态下的情况进行对比,采用容性移相PWM进行输出功率的自动调节。同时根据感应加热电源的整体结构进行参数选取,运用MATLAB进行仿真分析,仿真结果证明了这种方式可以实现输出功率的连续自动调节,且具有较宽的移相角调节范围。In the view of the adverse situation that IGBT （Insulated Gate Bipolar Transistor） has tail current and generates more turn - off loss when is turned off, this paper analyzes the characteristics the serial inverter switc- hing devices IGBT turns on and turns off in the capacitive load state, comparing the switching condition with res- onant load state, using capacitive phase - shifted PWM power modulation to achieve the output power automatic adjustment. The paper selects parameters based on the overall structure of the induction heating power supply, u- sing MATLAB to simulate and analyze, and the results show that this approach is able to achieve the output pow- er continuous automatic adjustment, and has wide adjustment range of the phase shifting angle.

关 键 词：感应加热电源 容性移相PWM调功 IGBT 拖尾电流 串联逆变器 移相角 

分 类 号：TM924.5[电气工程—电力电子与电力传动]