Rotor for dynamo electric machine

Details Rotor for dynamo electric machine Rotor for dynamo electric machine

H - Electricity

02

K

H02K 3/487 (2006.01) H02K 1/06 (2006.01) H02K 3/02 (2006.01) H02K 3/16 (2006.01) H02K 19/16 (2006.01)

Patent

CA 2134253

The present invention relates to a rotor for a dynamo electric machine serving as a synchronous generator as well as being designed to operate as a variable speed motor for starting a prime mover for the synchronous generator. The rotor is comprised of a rotor core, and a plurality of slots disposed around the circumference of the rotor core and extending along the axial direction of the rotor core. Rotor windings are accommodated in the slots and wedges are accommodated in the slots over the rotor windings near the surface of the rotor core for preventing the rotor windings from being pushed out of the slots due to the centrifugal force caused by rotation of the rotor. The wedges where eddy currents flow are formed by Cu-0.05 ~ 4wt% Zr-0.3 ~5wt% Ni-0.2 ~ 1.5wt% Si having a 0.2% proof stress equal to or more than about 20Kg/mm2 and an electrical conductivity equal to or more than about 20% IACS (International Annealed Copper Standard). Damage of the rotor elements due to electrolytic corrosion are prevented.

Cette invention concerne un rotor de machine dynamoélectrique servant de génératrice synchrone en plus de pouvoir servir de moteur à vitesse variable pour le démarrage d'un moteur d'entraînement de génératrice synchrone. Le rotor est formé d'une carcasse comportant une série d'encoches axiales sur son pourtour. Les enroulements rotoriques sont disposés dans les encoches et calés en place par des coins près de la surface de la carcasse, coins empêchant les enroulements de sortir des encoches sous l'effet de la force centrifuge résultant de la rotation du rotor. Les coins qui sont le siège de courants de Foucault sont faits de Si comportant, en poids, 0,05 ~ 4 % de Cu, 0,3 ~ 5 % de Zr et 0,2 ~ 1,5 de Ni et affichant une limite d'allongement de 0,2 % sous une charge égale ou supérieure à environ 20 kg/mm2 et une conductivité électrique égale ou supérieure à environ 20 % IACS (International Annealed Copper Standard). Les éléments du rotor sont protégés contre les dommages par corrosion électrolytique.

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