Induction motor (IM) drive system fed by dual PWM was concerned of its characteristic of working in four quadrants, almost sinusoidal-wave current at grid side and controllable power factor, etc.

• 摘要基于双PWM技术的异步电动机传动系统以4象限工作、网侧电流近似正弦和功率因数可控等特性受到广泛关注。