This paper proposes sliding mode pulse-width modulation (SMPWM) for the nine-switch inverter (NSI) as solution for the main drawback of voltage and current distortion. The proposed modulation is based on Lyapunov approach and can directly trigger the nine switches without restrictions and regardless of the operation frequency modes. SMPWM along with modified direct torque control-based sliding mode approach is designed for NSI driving dual-induction motor to obtain fixed switching frequency and low torque ripple. Stability analysis is carried out for each proposed method, and convergence condition depends on the value of dc-bus voltage that can be achieved. The feasibility of the proposed control is verified under load and speed conditions through simulation results.

本文提出了用于九开关逆变器（NSI）的滑模脉宽调制（SMPWM）作为电压和电流失真的主要缺点的解决方案。所提出的调制基于李亚普诺夫方法，可以不受限制地直接触发九个开关，并且无论工作频率模式如何。SMPWM 与改进的基于直接扭矩控制的滑模方法一起设计用于 NSI 驱动双感应电机，以获得固定的开关频率和低扭矩纹波。对每种提出的方​​法进行稳定性分析，收敛条件取决于可以实现的直流母线电压值。通过仿真结果验证了该控制在负载和速度条件下的可行性。