一种电流型三相逆变器PWM调制的数字实现

摘要

对一种倍频式电流型三相逆变器PWM调制方法进行分析,并用DSP与CPLD配合的数字方式实现了该调制方法.仿真结果显示,该调制方法与传统方法相比具有更好的开关损耗、THD特性.实验结果表明,提出的方案能够高质量地实现该调制方法,具有一定的实用价值.%This paper analyzes a certain kind of PWM modulation strategy of three-phase current source inverter, and proposes a realization method which uses DSP and CPLD.The simulation results show that the modulation strategy has a good performance in trade-off between switching loss and THD, and the experimental results show that the digital method proposed can realize the modulation strategy with high quality.