NPC三电平逆变SVPWM算法的研究

Research on NPC Three-level Space Vector PWM Algorithm

文章在介绍中点箝位三电平逆变器空间矢量PWM原理基础上,提出了一种实用的易于数字化实现的三电平逆变器空间矢量PWM算法,该算法很好地继承了目前广泛应用的两电平空间矢量PWM实现的流程。以该算法为基础,通过调整空间矢量切换点的位置,给出了电容中点电压平衡控制方案。通过合理的数字信号处理器引脚分配和寄存器的配置,提出了基于一片数字信号处理器TMS320F2407的三电平SVPWM实现方案。仿真和实验结果证实了所提出的空间矢量PWM算法和实现方法是正确可行的。

The principles of space vector PWM（SVPWM）for neutral-point-clamped（NPC）three-level inverter was introduced.Proposed the algorithm of space vector PWM for three-level inverter,which is practical easy to realize.This algorithm inherits primely the idea from two-level SVPWM which was applied extensively.The balancing control scheme of capacitor neutral point voltage was presented based on the proposed SVPWM algorithm by adjusting switching point of space vectors.Realization of three-level SVPWM based on one digital signal processor TMS320F2407 was proposed.In the realization,plotting the pin and configuring the registers properly in DSP are necessary.The simulation and experiment results verify that the proposed vector PWM algorithm and realizing method are valid and feasible.