Enhancing PMSM Performance with a Three-Level NPC Inverter Through DTC-SVM Technique and Sliding Mode Speed Controller
摘要
In this paper, we investigate the performance of a Permanent Magnet Synchronous Motor (PMSM) drive system utilizing a three-level Neutral Point Clamped (NPC) inverter through a combination of Direct Torque Control with Space Vector Modulation (DTC-SVM) and a Second Order Sliding Mode Controller (SOSMC) for speed control. The proposed control strategy integrates the benefits of DTC for its simplicity and rapid torque response with the robustness of SMC to handle load variations and ensure precise speed tracking. Additionally, the incorporation of SVM addresses the limitations of traditional DTC methods, such as variable switching frequency and torque ripples, while achieving significant reduction in Total Harmonic Distortion (THD), which improves current waveform quality and overall drive efficiency. Simulation results demonstrate the superior efficiency and stability of the SOSMC in maintaining consistent performance under various operational conditions, providing a more effective solution for PMSM drive control. Simulations performed in MATLAB/SIMULINK validate the enhanced performance, reliability, and harmonic reduction of the proposed control strategy across diverse operating conditions for motor torque and speed.