叠加型方波差频式高频链逆变器的调压方法

Voltage regulation method for difference frequency HF link inverter with superimposed square wave

针对方波电压差频式移相合成逆变器难以调压的问题,首先计算了负载输出电压基波幅值;然后提出了步进固定脉宽的移相升压策略和控制副逆变器输出实现次级绕组中脉冲抵消的降压控制策略,并计算出各变量与负载输出电压的关系;最后利用设计的参数进行了仿真和实验.仿真及实验结果与理论计算值一致,验证了本文所提方法的正确性和可行性.

To the problem that the phase-shifted synthesis inverter with square wave voltage differencefrequency is difficult to regulate voltage, the fundamental amplitude of the load’s output voltage is calculatedfirstly; next, the strategys to implement the phase shifted boosting voltage by stepping the fixed pulsewidth and tohave the step-down voltage control by controlling the output of the secondary inverter to realize the pulses in thesecondary winding cancellation, are proposed and the relations between the various variables and the loads’output voltage are computed as well, and finally, the simulation and experiments are performed in this paper.Simulation and experimental results are consistent with the theoretically calculated value, proving the proposedmethod to be of the correctness and feasibility.