Investigation of the Effect of Error in Initial Rotor Position Estimation of Synchronous Reluctance Motor on the Speed, Current and Starting Torque
Subject Areas : electrical and computer engineeringH. R. Pairo 1 , Farzad Bodaghi 2
1 - Niroo Research Institute, Tehran, Iran
2 - Elec. Eng. School, Iran University of Science and Technology, Tehran,
Keywords: Initial rotor position estimation, synchronous reluctance motor, electric motor drives, speed sensor.,
Abstract :
The inaccurate estimation of the initial rotor position in a synchronous reluctance motor can lead to reduced starting torque and slower rotor speed response at startup. Various methods have been proposed to estimate the initial rotor position of the synchronous reluctance motor, which can be categorized based on complexity, implementation, and estimation accuracy. Some of these methods, despite their high implementation complexity, reduce the error in estimating the initial rotor position. On the other hand, some methods are advantageous due to their low computational burden and ease of implementation, but they exhibit a higher error in estimating the initial rotor position, with some methods showing errors of up to 30 degrees. This paper examines the impact of initial rotor position estimation errors on the performance of synchronous reluctance motors from various aspects. To analyze the effect of estimation errors on the motor's parameters, errors of 0, 10, 20, and 30 degrees in initial rotor position were applied, and the resulting impact on parameters such as electromagnetic starting torque and rotor speed response time to the reference speed were investigated. The simulation results were presented using MATLAB/Simulink software.