脉冲式感应加热电源频率跟踪技术的研究与实现  

Research and Implementation of a Frequency Tracking Technology for the Pulsed Induction Heating Power

作　　者：王晓娜[1] 方旭 唐波[1] 叶树亮[1] Wang Xiaona;Fang Xu;Tang Bo;Ye Shuliang(Institute of Industry and Trade Measurement Technique China Jiliang University Hangzhou 310018 China)

机构地区：[1]中国计量大学工业与商贸计量技术研究所,杭州310018

出　　处：《电工技术学报》2018年第18期4357-4364,共8页Transactions of China Electrotechnical Society

基　　金：浙江省自然科学青年基金资助项目(LQ16F030003)

摘　　要：为解决传统感应加热电源中搜索谐振频率慢和频率跟踪实时性差的问题,提出一种改进型全数字定角频率跟踪技术,以满足脉冲涡流热成像对激励电源的特殊要求。首先,介绍脉冲式感应加热电源系统及工作原理,在此基础上对改进型定角频率跟踪技术进行详细的理论分析;然后,建立系统控制参数与系统稳态、动态性能的数学表达式,进一步分析品质因数、起动频率和频率步进值对系统动态响应特性的影响;最后,对基于脉冲式感应加热电源系统进行实验,并对改进型全数字定角频率跟踪技术的性能进行验证。结果表明:该频率控制系统具有搜索谐振频率快、实时跟踪能力强、稳定性好等优点,仿真和实验结果验证了该频率跟踪技术的有效性和可行性。In order to solve the problems of the slow searching resonant frequency and poor real-time performance of the frequency tracking in traditional induction heating power supplies,this paper proposes a modified all digital fixed-angle frequency tracking technology to meet the special demand of the induction heating power supply for pulsed eddy current thermography.First,the pulsed induction heating power system and operating principle were introduced.Then,the theoretical analysis of all digital fixed-angle frequency tracking technology was addressed in detail.The mathematical expressions of system steady and dynamic performance with system control parameters were established.The influences of the quality factor,initial frequency and stepped frequency on the dynamic performance of the system were further analyzed.Finally,experiments were conducted based on a pulsed induction heating power system to verify the performance of the modified all-digital fixed-angle frequency tracking technique.The simulation and experimental results show that this frequency tracking technique has the advantages of fast searching resonance frequency,good strong real-time tracking and good stability.

关 键 词：全数字定角频率控制 频率跟踪技术 串联型逆变器 感应加热电源 脉冲涡流热成像 

分 类 号：TN86[电子电信—信息与通信工程] TM924.5[电气工程—电力电子与电力传动]