Sensorless Rotor Position Estimation of PMSM by flux linkage method

Abstract: PMSM is very efficient motor and used to control speed or torque in many high performance applications. Field orient control (FOC) method makes this feasible. To implement field orient control technique in drive, accurate rotor position and speed information is required. Cost of drive can be reduced if rotor position information can be obtained without position sensor. In this paper estimation of rotor position is presented by the flux linkage method. Simulation is carried out in Simulink/Matlab and simulation results are presented.

Keywords: PMSM, sensorless, position estimation, FOC, flux linkage.