Sensorless speed control of permanent magnet synchronous motor drive using extended kalman filter with initial rotor position estimation

Abstract EN

This paper proposes a new approach to a sensor less speed control and initial rotor position estimation a salient pole Permanent Magnet Synchronous Motor (PMSM) drive.

The estimation of the position and of the speed in dynamic rate were derived by the use of the extend Kalman filter algorithm by only measuring the phase voltages and motor currents.

For the starting with a maximum torque and an imposed rotation way, it is necessary to know the initial position.

The starting procedure is a problem under senseless drives, because no information is available before starting.

In this work, we shall establish a new convenient technique for detecting the rotor initial position, based on signal tests applied to the stopped machine.

The validity of the proposed sensor less control strategy, according to the different initial rotor position conditions are discussed and simulation results are presented.

The experimental results show very well the validity of the proposed method for the estimation of the initial rotor position of the PMSM.