MTPA Control Strategy for ALA Rotor SynRM Based on Reactive and Apparent Power Calculation under Sensorless V/f Control with Stabilization

This paper presents a sensorless $\mathrm{V}/\mathrm{f}$ control strategy for an axially laminated anisotropic (ALA) synchronous reluctance motor (SynRM) with stabilization and maximum torque per ampere (MTPA) control strategy. The proposed MTPA loop is based on reactive and apparent power calculation. Dividing reactive and apparent power a phase shift component to control $q_{\mathrm{v}}$-axis current in voltage vector reference frame $d_{\mathrm{v}}q_{\mathrm{v}}$ is obtained. Based on this component the amplitude of stator voltage is corrected to maintain MTPA control of SynRM. The proposed method was verified by simulation and experiments showing accurate MTPA tracking.