Simulation Analysis of Sensorless Control of Synchronous Reluctance Motor Based on Optimal Current Distribution Strategy

Abstract

With the purpose of meeting the high-quality operation requirements of the synchronous reluctance motor, the pulsating high-frequency sinusoidal voltage injection is used to implement precise tracking of the rotor position to enable the motor to start smoothly and achieve closed-loop control. The real-time inductance parameters of the motor in different cases are obtained by using finite element method to adjust the current distribution strategy according to the inductance saturation of the motor, which effectively reduces the influence of magnetic circuit saturation on algorithm accuracy. The optimal current distribution strategy to maximize the torque is proposed, which improves the operating efficiency of the motor, and assists the controlling system to obtain good dynamic response and anti-load interference ability. A sensorless controlling system of synchronous reluctance motor on optimal current distribution strategy is established. The given values of quadrature and direct axis current can be obtained by combining the inductance parameters of the motor under current working conditions. The superiority of the control strategy in improving the operating efficiency of the motor is verified by Matlab/Simulink simulation.