一种简单的直接数字式空间矢量PWM实现方法

A simple direct digital space vector PWM realization method

针对常规SVPWM实现困难的缺点,根据零序信号注入方法以及“伏 秒”平衡原理,提出了一种新的SVPWM实现方法,利用这种方法可以直接获得逆变器开关触发时刻,因此可以减小运算器执行周期,提高计算速度.用该方法实现了永磁同步电动机的磁场定向矢量控制,并进行了仿真和实验研究,证明了新方法的正确性和优越性.

To improve the practicabilityof the traditional SVPWM, a new SVPWM method is proposed in terms of zero sequence signal insertion method and “voltage-second” balance principle. The inverter switch triggering time can be directly got with the new method, therefore the CPU operation period is reduced and the operation speed is improved. The proposed method is adopted to control a permanent magnet synchronous motor with rotor flux oriented control technology. Thesimulation and experiments results are given to confirm the correctnessand advantages of the new method.