交流异步电动机SVPWM变频调速的研究

Research on SVPWM of Variable Frequency and Speed Ajusting of Asynchronous Electromotor

分别用同步调制、异步调制、混合调制三种方法实现电压空间矢量脉宽调制型逆变器,在一台三相异步电动机上进行了试验调试,实验结果表明:与同步和异步调制相比,混合调制时电机电流的谐波小,电压利用率高,电机的高频噪声低。

An SVPWM inverter is implemented by synchronizing modulation, asynchronizing modulation and mixing modulation. The design scheme is tested and debugged on a three-phase asynchronous motor in the end, and the results show that the method of mixed modulation has lower current harmonic, more efficient use of supply voltage, lower noise than the synchronized modulation and asynchronized modulation.