H - Electricity – 02 – P
Patent
H - Electricity
02
P
H02P 21/14 (2006.01) H02P 25/02 (2006.01)
Patent
CA 2681037
Indirect rotor resistance estimation for an AC induction motor is achieved by successively stepping the quadrature command to zero and the direct current command to a predetermined value causing the quadrature stator voltage to decay as a representation of rotor current decay; defining, in response to the decaying stator voltage reaching two spaced thresholds, a voltage/time difference, and retrieving from a storage device the rotor resistance associated with the voltage/time difference.
L'invention concerne une estimation indirecte de résistance de rotor pour un moteur à induction AC, obtenue en étageant successivement l'instruction de quadrature vers zéro et l'instruction de courant continu vers une valeur prédéterminée amenant la tension de stator de quadrature à dégénérer comme une représentation de dégénérescence de courant de rotor; définir, en réponse à la tension de stator dégénérescente atteignant deux seuils espacés, une différence tension/temps, et récupérer à partir d'un dispositif de stockage la résistance de rotor associée à la différence tension/temps.
Azure Dynamics Inc.
Fetherstonhaugh & Co.
LandOfFree
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