Vector controller of induction motor

H - Electricity – 02 – P

Patent

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H02P 21/00 (2006.01)

Patent

CA 2572969

A vector controller of an induction motor arranged to attain stabilized rotation within a short control time by increasing the SN ratio of output voltage even when the rotational speed is low thereby suppressing the error of a primary angular frequency operation value. The vector controller of an induction motor calculates a flux command operation value based on a torque command value, circuit constants of the induction motor, and a flux command value selected based on the measurements of the induction motor such that a voltage being applied to the induction motor becomes not lower than a set level.

L~invention concerne une unité de commande vectorielle d~un moteur asynchrone conçue pour stabiliser la rotation dans un court délai de commande en augmentant le rapport signal/bruit de la tension de sortie, même si la vitesse de rotation est faible, en éliminant ainsi l~erreur associée à une valeur opérationnelle de la fréquence angulaire du primaire. L~unité de commande vectorielle d~un moteur asynchrone calcule une valeur fonctionnelle de commande de flux en fonction d~une valeur de commande de couple, de constantes de circuit du moteur asynchrone et d~une valeur de commande de flux déterminées par des mesures du moteur asynchrone, de façon à ce qu~une tension appliquée au moteur asynchrone ne passe pas en dessous d~un niveau de consigne.

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