H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 3/51 (2006.01)
Patent
CA 2759459
The invention relates to an electrical machine (10) in the power range of several MVA, especially an asynchronous machine, which electrical machine (10) comprises a rotor rotating about an axis and having a rotor winding, said rotor winding being arranged in a rotor lamination stack and having a winding head (16) outside said rotor lamination stack, said winding head (16) being equipped with a winding head retention system (29), which comprises a plurality of radially oriented retention elements (20, 21) for absorbing the centrifugal forces acting on the winding head during machine operation. The safety of the machine is improved by providing said retention elements (20, 21) with locking means (22, 23), which safeguard the retention elements (20, 21) against unlocking and/or blowing away of fragments in case of a failure.
L'invention concerne une machine électrique (10) d'une puissance se situant dans une plage de plusieurs MVA, en particulier une machine asynchrone, ladite machine électrique (10) comprenant un rotor tournant autour d'un axe et comprenant un enroulement rotorique placé dans un corps de tôle rotorique, et une tête de bobine (16) découverte placée à l'extérieur du corps de tôle rotorique, dotée d'un système de retenue (29) de tête de bobine, destiné à absorber les forces centrifuges produites en cours de fonctionnement, et comprenant une pluralité d'élément de retenue (20, 21) agissant dans la direction radiale. La sécurité de la machine est accrue par des moyens d'arrêt (22, 23) installés sur les éléments de retenue (20, 21), et empêchant une libération et/ou une projection accidentelle de ces derniers en cas de rupture.
Cifyildiz Serdar
Schmid Matthias
Schwery Alexander
Alstom Hydro France
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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