Sensorless Drive of SynRM using Sliding Mode Observer based on Maximum Torque per Ampere Control Approach

This research introduces a high-performance sensorless control strategy for synchronous reluctance motor (SynRM) drives, utilizing a sliding mode observer (SMO) for the estimation of rotor position and velocity. The SMO is developed using the back electromotive force (Back-EMF) components of the SynRM within the stator reference frame. The stator current and voltage components in the stationary reference frame serve as inputs to the SMO, while the estimated rotor position and speed are obtained as outputs from the calculated Back-EMF components. Moreover, to enhance the capability of the entire drive system, a loss mitigation approach referred to as maximum torque per ampere (MTPA) is utilized to reduce rotor losses during steady-state operation. Finally, simulation outcomes obtained from MATLAB/SIMULINK are used to validate the operation of the sensorless control system for the SynRM utilizing the SMO.