High-speed and high-power motor drive systems are critical for applications such as electric vehicles and industrial automation. These systems often utilize synchronous space vector pulse width modulation (SSVPWM) strategies to optimize performance. However, the multi-mode synchronous SVPWM will bring about a sudden change in the phase angle due to the switching of the number of pulses. . This paper proposes a method employing the Smith predictor to correct phase and amplitude errors caused by digital control delays. Compared with the existing methods, this method can respond to the phase error more quickly, especially at low carrier ratio, thus improving the stability and performance of the system.

Closed-loop current control,digital control delay,Synchronized space vector pulse width modulation (SSVPWM),Smith predictor,Three-level inverter