Sensorless back stepping control for a five-phase permanent magnet synchronous motor drive based on sliding mode observer

Abstract

This paper presents the development of a speed control technique for a five-phase permanent magnet synchronous motor drive (PMSM) based on sliding mode observer (SMO) and back stepping controller. The design of back stepping controller is detailed. The stability of the closed-loop system is demonstrated in the context of Lyapunov theorem. In order to apply a sensorless five-phase PMSM control, a SMO is used which estimates the rotor speed and the rotor position. Simulation results are reported to prove the efficacy of the proposed strategy in closed loop.