三电平逆变器SVPWM控制策略及实验研究

SVPWM Control Strategy and Experiment Research on Three-level Inverters

在两电平的常规空间矢量PWM算法的基础上,给出了三电平空间矢量PWM算法,并提出一种改进的三电平空间矢量PWM调制策略来进行二极管钳位型三电平逆变器的控制,从而实现最小开关损耗。基于TMS320F240 DSP实现了三电平逆变系统的数字控制,实验结果论证了该方案的可行性。

A novel space vector PWM (SVPWM) modulation strategy used in three-level NPC inverter to reduce switching loss is provided. Through coordinating transformation, it can easily obtain the control of the space voltage vector. The whole system has been implemented digitally by using TMS320F240 DSP, and the modulation strategy and control scheme is demonstrated by the experimental waveforms and corresponding speetrums.