一种新型的H桥级联型逆变器空间矢量控制方法

Novel Multilevel Space Vector PWM Technique for H-bridge Cascaded Inverter

将三电平空间矢量调制方法与传统的移相式SPWM方法相结合并应用于级联型结构,提出了一种新型的多电平移相型空间矢量控制方法。提出的空间矢量控制方法在软件和硬件实现上大大简化,很容易扩展到任意电平数,可以与矢量控制、直接转矩控制等相结合应用于电机调速系统。并在3单元级联型逆变器实验装置上进行了验证。仿真和实验都证明了这种方法的正确性与可行性。

A novel multilevel space vector PWM method based on conventional phase-shift SPWM technique and three-level space vector PWM technique was proposed for H-bridge cascaded inverters. Combining with vector control and DTC, the proposed approach is developed for H-bridge cascaded multilevel inverters used for induction motor control. Using this technique, the implementation of software and hardware is greatly simplified. And it can be extended to higher level inverters easily. The proposed technique is verified by simulations and experiments with a three-cell cascaded inverter.