感应加热电源频率跟踪控制的研究  

Research on frequency-tracking control for induction heating power supply

作　　者：杨宗璞[1] 宋书中[1] 马建伟[1] 朱锦洪[2] 

机构地区：[1]河南科技大学电子信息工程学院,河南洛阳471003 [2]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《电源技术》2010年第12期1296-1298,共3页Chinese Journal of Power Sources

基　　金：河南省科技攻关计划项目(082102210015)

摘　　要：为减小逆变器功率器件的开关损耗,提高装置输出效率,应该控制逆变器的工作频率实时跟踪负载谐振频率,确保开关器件工作在零电压零电流开关(ZVZCS)状态。介绍了在感应加热电源中采用TMS320F2812实现超音频频率跟踪的数字锁相环(DPLL)方法,给出了实现DPLL的算法。并对基于该芯片的DPLL频率跟踪控制的原理进行了分析。最后给出了相应的仿真波形和感应加热电源样机的实验波形,验证了该方法的正确性。In order to reduce the loss of switching components and improve the efficiency of the power,the operating frequency of the inverter power was controlled,so as to track the load resonant frequency simultaneously to keep the inverter always operating in zero voltage current switching（ZVZCS） mode.A method for implementing the digital phase locked loop（DPLL） applied to induction-heating power supply was put forward in the paper.The process of implementing this method using DSP2812 was presented also.The frequency tracking method based on DPLL and the theory were analyzed,and the corresponding waveforms of simulation and experiments were given.The experimental results verify the correctness of this method.

关 键 词：数字信号处理器 感应加热电源 数字锁相环 

分 类 号：TM47[电气工程—电器]