摘要
针对感应加热电源负载参数变化引起固有谐振频率的变化,从而导致逆变器的效率降低,提出并实现以集成锁相环CD4046为核心,应用于以MOSFET为功率器件的串联谐振感应加热电源的频率跟踪控制系统中,对电源的输出频率实时控制,实现逆变器工作在零电压零电流开关模式,并对电源的启动问题作了分析。运用MATLAB对频率跟踪系统进行仿真分析,最后进行实验验证。
In consideration of the resonant frequency being changed by load parameter variation,which led the power efficiency reduction in an induction heating power,a frequency track control system devised based on the CD4046 integrated phase-locked loop is designed and proposed firstly.It is applied to control the serial resonant inverter with power MOSFET as switching device timely,so as to adapt varieties of the load resonant frequency to keep the inverter always working on Zero Voltage-Zero Current Switching mode.Meanwhile,this paper analyzes and discusses the question of starting of the control system.After that,the model of frequency tracking is set up and analyzed in MATLAB.
出处
《工业控制计算机》
2015年第10期123-124,150,共3页
Industrial Control Computer
关键词
感应加热
锁相环
串联谐振
频率跟踪
induction heating
phase-locked loop
serial resonant
frequency tracking
