Abstract：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.
王晓娜, 方旭, 唐波, 叶树亮. 脉冲式感应加热电源频率跟踪技术的研究与实现[J]. 电工技术学报, 2018, 33(18): 4357-4364.
Wang Xiaona, Fang Xu, Tang Bo, Ye Shuliang. Research and Implementation of a Frequency Tracking Technology for the Pulsed Induction Heating Power. Transactions of China Electrotechnical Society, 2018, 33(18): 4357-4364.
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2018, Vol. 33 
