Speed Sensorless Control of PMSM with Unscented Kalman Filter and Initial Rotor Alignment

Abstract

This paper presents an implementation of Unscented Kalman Filter for estimation of the speed and position of permanent magnet synchronous machine. Mathematical model of the motor is designed in dq synchronous reference frame fixed to rotor flux and discretized by Taylor series expansion. Mechanical rotor alignment with d-axis as a starting procedure for the speed sensorless control is shown. Experimental results done with RT-LAB and OP 5600 rapid prototyping hardware show the performance of the speed and position estimation.