Commande sans capteur de moteurs électriques par injection de signal

par Dilshad Surroop

Projet de thèse en Mathématique et automatique

Sous la direction de Philippe Martin et de Pierre Rouchon.

Thèses en préparation à Paris Sciences et Lettres , dans le cadre de Ingénierie des Systèmes, Matériaux, Mécanique, Énergétique , en partenariat avec Mathématiques et Systèmes (laboratoire) , CAS - Centre Automatique et Systèmes (equipe de recherche) et de École nationale supérieure des mines (Paris) (établissement de préparation de la thèse) depuis le 01-01-2019 .


  • Résumé

    Electric motors are the most important source of mechanical energy in the industry. They should be controlled, so that they rotate safely at the desired speed. For many years, it has been known that they can be properly controlled at medium to high speed using only the current sensors embedded in the drive. Such control laws have been implemented into industrial products. However, controlling electric motors at low frequency or standstill remains a challenging task, because the observability of their state degenerates in this frequency range, when only motor current sensors are used. Operation in this frequency range is required for some industrial applications of electric motors such as lifts and cranes. To avoid using expensive and unreliable mechanical encoders, high frequency signal injection was proposed to recover observability at low speed for the Induction Motors (IM), the Permanent Magnet Synchronous Motors (PMSM) and the Synchronous Reluctance Motors (SynRM). It relies on the impact of a high frequency signal superimposed onto the control to obtain additional information on the system state. To determine the information gained by signal injection, a more accurate model of the motor, including magnetic saturation, is required. That is why signal injection is yet less used in industrial products.

  • Titre traduit

    Signal injection and sensorless control of electric motors


  • Résumé

    Electric motors are the most important source of mechanical energy in the industry. They should be controlled, so that they rotate safely at the desired speed. For many years, it has been known that they can be properly controlled at medium to high speed using only the current sensors embedded in the drive. Such control laws have been implemented into industrial products. However, controlling electric motors at low frequency or standstill remains a challenging task, because the observability of their state degenerates in this frequency range, when only motor current sensors are used. Operation in this frequency range is required for some industrial applications of electric motors such as lifts and cranes. To avoid using expensive and unreliable mechanical encoders, high frequency signal injection was proposed to recover observability at low speed for the Induction Motors (IM), the Permanent Magnet Synchronous Motors (PMSM) and the Synchronous Reluctance Motors (SynRM). It relies on the impact of a high frequency signal superimposed onto the control to obtain additional information on the system state. To determine the information gained by signal injection, a more accurate model of the motor, including magnetic saturation, is required. That is why signal injection is yet less used in industrial products.