A brushless motor control system

H - Electricity – 02 – P

Patent

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Details

H02P 8/14 (2006.01) H02P 8/34 (2006.01) H02P 8/38 (2006.01)

Patent

CA 2440381

The invention relates to a control system with auto-switching for a brushless motor (10) powered according to a pre-determined electric cycle to make the rotor advance. The inventive control system comprises a device (100) to indicate the mechanical position of the rotor associated with a detection device (50) forming a device (150) for the incremental coding of the mechanical position of the rotor. The system also comprises a motor control assembly comprising a means for processing (20) the rotor mechanical position coding signals connected to a means for regulating (30) the power supply of the numerous stator windings. The rotor mechanical position indicator device comprises at least one series (101) of rotor mechanical position indications corresponding to the passage of an electric stator cycle such that the incremental coding device (150) delivers a synchronisation signal for all the electric cycles to the processing means.

Pour le pilotage en auto-commutation d'un moteur sans balais (10) alimenté en courant suivant un cycle électrique prédéterminé pour faire avancer le rotor, le système de contrôle comprend un dispositif indicateur (100) de la position mécanique du rotor associé ô un dispositif de détection (50) formant un dispositif de codage incrémental (150) de la position mécanique du rotor. Le système comprend également un ensemble de commande du moteur composé d'un moyen de traitement (20) des signaux de codage de la position mécanique du rotor relié ô un moyen de régulation (30) de l'alimentation de la pluralité d'enroulements du stator. Le dispositif indicateur de la position mécanique du rotor comprend au moins une série (101) d'indications de la position mécanique du rotor correspondant au passage d'un cycle électrique du stator de sorte que le dispositif de codage incrémental (150) délivre au moyen de traitement un signal de synchronisation pour tous les cycles électriques.

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