Adapted Back-EMF Sensorless Control for Permanent Magnet Synchronous Motors

Charbel Zaghrini (1) , Gabriel Khoury (1) , Maurice Fadel (2)

1 USJ - Université Saint-Joseph de Beyrouth
2 LAPLACE-CODIASE - COmmande et DIAgnostic des Systèmes Electriques

This paper presents a sensorless control method for permanent magnet synchronous motors (PMSMs) based on the reconstruction of the speed and position of the rotor using the traditional method of the back-EMF with the addition of an innovative observation speed. The gains of the observer are a function of the speed and here a simple adaptation law that avoids the calculation in real time of the gains is proposed. Furthermore the speed is calculated from the back-EMF which induces a velocity oscillation due to the observation errors inherent to the sinusoidal forms. To overcome this difficulty, the direct derivation of the position is proposed taking into account the discontinuity of the position due to the modulo function. Simulation and experimental results validate the proposed method.

Mots clés: PMSM; back-EMF; observers; Sensorless; Control

Domaines: Automatique / Robotique; Energie électrique

Charbel Zaghrini, Gabriel Khoury, Maurice Fadel. Adapted Back-EMF Sensorless Control for Permanent Magnet Synchronous Motors. 2019 IEEE International Conference on Industrial Technology (ICIT), Feb 2019, Melbourne, Australia. pp.219-224, ⟨10.1109/ICIT.2019.8755120⟩. ⟨hal-03545597⟩