Vector controller for induction motor

H - Electricity – 02 – P

Patent

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H02P 21/00 (2006.01)

Patent

CA 2542916

An object is to provide a vector control apparatus for an induction motor which is capable of correcting a set value of a mutual inductance so as to match an actual value thereof by addition of software processing without addition of any particular device. A vector control apparatus (1) for an induction motor according to the present invention includes a mutual inductance correction section (3) that obtains a correction value of a mutual inductance of the induction motor (15) based on an error between a torque calculation value calculated by using a measured value of a primary current of the induction motor (15) and a torque command value to the induction motor (15) generated by a torque command generation section, and a vector control section (2) that controls the induction motor by using a circuit constant of the induction motor (15) including the correction value of the mutual inductance in such a manner that a torque generated by the induction motor (15) coincides with the torque command value.

L'invention concerne une unité de commande vectorielle d'un moteur asynchrone capable de corriger la valeur de consigne de l'inductance mutuelle pour la faire correspondre à une valeur effective par le biais d'un traitement logiciel supplémentaire ne nécessitant aucun dispositif spécial. L'unité de commande vectorielle (1) d'un moteur asynchrone comprend une partie (3) destinée à déterminer la valeur de correction de l'inductance mutuelle d'un moteur asynchrone (15) en fonction de l'erreur entre une valeur opérationnelle de couple calculée à l'aide d'une mesure du courant primaire du moteur asynchrone (15) et une valeur de commande de couple pour le moteur asynchrone (15), générée au niveau d'une partie de génération de commandes de couple, et une partie de commande vectorielle (2) pour commander le moteur asynchrone de façon à ce que le couple généré du moteur asynchrone (15) corresponde à la valeur de commande de couple, en utilisant les constantes de circuit du moteur asynchrone (15) ainsi que la valeur de correction de l'inductance mutuelle.

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