H - Electricity – 02 – P
Patent
H - Electricity
02
P
H02P 21/00 (2006.01) H02P 21/12 (2006.01) H02P 21/14 (2006.01)
Patent
CA 2279305
In accordance with the invention, the stator current model space vector (îs) and the stator current real space vector (is) are each processed in line with operating points, as regards their position and amplitude, before said processed space vectors are transformed into a complex reference system. In this way, the known method to determine the rotational speed of a polyphase machine which is operated by field orientation without a transmitter involving little effort and considering ever the slightest rotational speeds is improved in such a way that the operation-dependence of the relationship between rotational speed difference and standard deviation is considerably reduced.
Selon l'invention, le vecteur spatial modèle de courant de stator (îs) et le vecteur spatial réel de courant de stator (is) sont traités chacun en fonction de points de fonctionnement, quant à leur position et leur amplitude, avant que ces vecteurs spatiaux traités soient transformés en un système de référence complexe. Ainsi, on améliore le procédé connu permettant de déterminer une vitesse de rotation d'une machine polyphasée commandée par orientation de champ, sans capteur, de façon relativement simple jusqu'à des vitesses de rotation extrêmement faibles. Ainsi, la dépendance, liée au fonctionnement, de la relation entre la différence de vitesse de rotation et l'écart de réglage est considérablement réduite.
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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