High performance brushless motor and drive for an electrical...

H - Electricity – 02 – K

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Details

H02K 21/22 (2006.01) B60L 11/04 (2006.01) H02K 29/03 (2006.01) H02P 6/24 (2006.01)

Patent

CA 2572560

The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases and a cylindrical outer rotor. This structure minimizes torque ripple and maximizes energy efficiently. All coil windings are wound around the stator teeth. Several winding configurations are proposed and a special one with only one coil per slot. The motor phases are supplied by alternating rectangular current waveforms. A specific inverter central system. is described to maximize efficiency and reduce current ripple and electromagnetic interference under motorizing or generating operations. The current control is realized by using, the mosfets voltage for the current measurement.

Ce système comporte un moteur trois phases à aimant permanent ainsi qu'un convertisseur de courant électrique commandé par modulation d'impulsions en durée. Le moteur comporte vingt-deux pôles et vingt-quatre encoches, trois phases et un rotor externe cylindrique. Cet agencement réduit l'ondulation de couple et maximise la puissance de façon satisfaisante. Tous les enroulements de bobine sont faits autour des dents du stator. Plusieurs configurations de bobinage sont proposées ainsi qu'une configuration ne possédant qu'une bobine par encoche. Les phases du moteur sont fournies par des formes d'ondes rectangulaires de courant alternatif. L'invention porte également sur un système de commande de convertisseur spécifique maximisant l'efficacité et réduisant l'ondulation du courant ainsi que les interférences magnétiques lors des opérations de motorisation ou de génération de puissance. La commande du courant est effectuée à l'aide d'une tension de transistor à effet de champ à portée isolée pour la mesure du courant.

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