摘要
由于功率金属氧化物半导体场效应管(MOSFET)电压容量等级较低,为实现高频感应加热电源的大功率输出,对基于多电平变换技术的串联谐振电压源逆变电路在感应加热电源中的应用问题进行了研究。给出了一种带无源无损吸收电路的多电平逆变拓扑结构以及吸收电路的参数设计方法,实现了逆变电路中二极管反向恢复现象的抑制及功率器件开关条件的改善;通过对逆变电路死区工作过程的分析,确定了逆变电路的信号触发方式,解决了负载电压二次换向及电压波形的调整问题。通过工作频率为500kHz的感应加热电源的仿真和实验结果,验证了研究工作的可行性及正确性。
Because the voltage leval of power MOSFET is low, a series resonance voltage inverter based on multilevel technology is applied to high frequency induction heating power supply to realize high output power in this paper. Several application problems are studied. For restraining the reverse recovery current in diode and improving the switching condition of power MOSFET, a passive lossless snubber is adopted and the design method of parameters in the snubber is presented. The work mode of multilevel inverter is confirmed through analyzing the work process of inverter in dead-time, by which the problems of load voltage commutating and adjusting are solved. The simulation and experimental results of 500kHz induction heating power supply verify the validity of the research work.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第6期82-88,共7页
Transactions of China Electrotechnical Society
关键词
感应加热
多电平技术
逆变电路拓扑
反向恢复电流
无源无损吸收电路
Induction heating, multilevel technology, inverter topology, reverse recovery current,passive lossless snubber
