G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 27/26 (2006.01) G01R 31/06 (2006.01) G01R 31/34 (2006.01)
Patent
CA 2126756
The invention relates to a method of determining a short-circuit inductance in an asynchronous machine. To enable the de- termination of the snort-circuit inductance even during the operation of the machine, the method comprises the steps of causing a step change in the stator voltage (u s); measuring both the stator voltage (u s) and the stator current derivative (~~) both before and after said step change in the stator voltage; determining the difference between the measured stator voltages (u s(t ~), (u s(t ~)) and the difference between the measured stator current derivatives (i s,(t~), (~ s(t ~)); and determining the quotient of the difference between the stator voltages and the difference between the stator current derivatives for obtaining a short-circuit inductance (~~~).
Procédé de détermination de l'inductance de court-circuit dans une machine asynchrone. Afin de déterminer l'inductance de court-circuit même pendant le fonctionnement de la machine, ce procédé consiste à provoquer une variation en échelon de la tension du stator (u(Boolean not)s); à mesurer la tension du stator (u(Boolean not)s) ainsi que la dérivée du courant du stator (i(Boolean not)'s) avant et après ladite variation en échelon de la tension du stator; à déterminer la différence entre les tensions du stator mesurées (u .B7s(t1), (u(Boolean not)s(t2)) et la différence entre les dérivées des courants du stator mesurées (i(Boolean not)'s(t1), (i(Boolean not)'s(t2)); et à déterminer le quotient de la différence entre les tensions du stator et la différence entre les dérivées des courants du stator de façon à obtenir une inductance de court-circuit (sigmaLs).
Abb Industry Oy
Gowling Lafleur Henderson Llp
LandOfFree
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