Rotating electric machine, in particular double-fed...

H - Electricity – 02 – K

Patent

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Details

H02K 1/28 (2006.01)

Patent

CA 2759220

The invention relates to a rotating electric machine, especially a double-fed asynchronous machine in the power range from 20 to 500 MVA, which comprises a rotor rotating about an axis and being concentrically surrounded by a stator, whereby the rotor has a rotor lamination stack (14) made up of sheets, which are pressed into a composite assembly in the axial direction, said rotor lamination stack (14) being subdivided in the radial direction into an inner mechanical part (14b) and an outer electrical part (14a), and accommodating a rotor winding (18) within said electrical part (14a). In such a machine, the axial clamping of the rotor lamination stack is optimized in that the rotor lamination stack (14) is pressed in the mechanical part (14b) by means of shear bolts (22) axially reaching through said rotor lamination stack (14), and in the electrical part (14a) by means of further bolts (21).

L'invention concerne une machine électrique rotative, en particulier une machine asynchrone à alimentation double d'un niveau de puissance compris entre 20 MVA et plus de 500 MVA. La machine comprend un rotor tournant autour d'un axe et entouré de manière concentrique par un stator. Le rotor présente un corps en tôle de rotor (14) réalisé avec des tôles en couches pressées en direction axiale, pour former un composite, lequel est divisé en direction radiale en une zone mécanique interne (14b) et une zone électrique externe (14a), un enroulement de rotor (18) étant logé dans la zone électrique (14a). Avec une telle machine, la déformation axiale du corps en tôle de rotor est optimisée du fait que le corps en tôle de rotor (14) est pressé dans la zone mécanique (14b) à l'aide d'un goujon de cisaillement (22) traversant en direction axiale le corps en tôle de rotor (14) et dans la zone électrique (14a), à l'aide d'un autre goujon (21).

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