Method and control system for controlling a synchronous...

H - Electricity – 02 – P

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H02P 6/24 (2006.01) B60L 7/10 (2006.01) B60L 15/02 (2006.01) B60L 15/20 (2006.01) H02P 21/00 (2006.01)

Patent

CA 2700913

A method of controlling an electric synchronous machine (2) having a stator and a moving part comprises the following steps: operating the machine (2) with a deceleration moment (M p) so that a moving part speed of the machine is reduced, monitoring the moving part movement of the machine, and upon detection of a direction reversal or a speed (v) of the moving part of approximately zero, a transition to a holding mode is effected, adjusting at least one electric supply variable (I; i u, i v, i w) of an electric stator system of the machine such that, at the beginning of the holding mode, an effective internal moment (M B) of the machine is formed that is reduced with respect to the deceleration moment (M p). The electric supply variable (I; i u, i v, i w) is adjusted in this manner until, with movement of the moving part and influence of an external moment (M A) acting on the machine, a stable equilibrium of moments between external moment (M A) and internal moment (M B) of the machine is established.

Procédé pour commander une machine électrique synchrone (2) dotée d'un stator et d'un rotor comportant les étapes consistant à : faire fonctionner la machine (2) avec un couple de décélération (MP) de façon à réduire la vitesse du rotor de la machine ; surveiller le déplacement du rotor de la machine. Lors de la détection d'un changement de sens ou d'une vitesse (v) du rotor quasiment nulle lors du passage à un mode d'arrêt, au moins une grandeur d'alimentation électrique (I ; iu, iv, iw) d'un système de stator électrique de la machine est réglée de manière à former, au début du mode d'arrêt, un couple interne actif (MB) de la machine qui est réduit par rapport au couple de décélération (MP). La grandeur d'alimentation électrique (I ; iu, iv, iw) est réglée jusqu'à ce que, grâce au déplacement du rotor et à l'influence d'un couple externe (MA) agissant sur la machine, un équilibre stable des couples entre le couple externe (MA) et le couple interne (MB) de la machine soit réglé.

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