级联型高压变频器控制算法的研究及实现

Research and Realization of Control Algorithm of Cascaded High Voltage Converter

介绍了级联型高压变频器的拓扑结构和多载波控制算法,从理论上分析了载波移相式算法的优点。针对在实际设计中使用多载波算法时存在的困难,给出了一种基于数字信号处理器(DSP)和现场可编程门阵列(FPGA)芯片实现错位移相式算法的方法。从实验结果中可以看出,级联型错位移相式变频器的输出相电压和线电压的阶梯数目较多,波形非常接近正弦波,且电压的变化率小,进而证明了文章所提到的实现方法的可行性。

The topology of cascaded high voltage converter and multi-carrier control algorithm are introduced in this paper,and the merit of the phase shifted algorithm is analyzed.In order to resolve the problems while realizing this algorithm,a method to realize phase shifted control algorithm based on digital signal processing（DSP） and field programmable gate array（FPGA） is also proposed.The experimental results show that the steps＇ number of output phase voltage and line voltage is very large.The waveform is very close to the sine wave and the changing rate of the voltage is very small.All these also prove that the method proposed is feasible.