Nonlinear Speed Control using Adaptive Sliding Mode and Lyapunov approaches for PMSM fed by a 3 - levels NPC Inverter

A robust non linear strategy for high performance Permanent Magnet Synchronous Motor (PMSM) drives fed by a 3 levels NPC inverter is proposed. The developed approach leads to the design of Lyapunov theory in order to linearize the behavior of the PMSM. High accuracy and robustness to disturbances and parameter variations is obtained by designing an adaptive variable structure control (AVSC) to achieve speed tracking objective. The stability of the closed loop is demonstrated using Lyapunov theory. Extensive simulation work leads to significant results illustrating the good performances of the overall designed scheme.