Electrical machine having a stator with cooled winding bars

H - Electricity – 02 – K

Patent

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Details

H02K 9/00 (2006.01) H02K 1/20 (2006.01) H02K 3/24 (2006.01) H02K 3/48 (2006.01)

Patent

CA 2499641

An electrical machine comprises a stator (10) with a laminated body (11), in which a number of grooves (12), running in the axial direction are provided, in each of which several winding bars (13, 14) are arranged lying over each other in the radial direction, separated from each other by separator means (19), lying between the same. Channels (20), running parallel to the winding bars (13, 14), are provided therein, through which a coolant for the cooling of the winding bars (13, 14) flows. A significantly improved cooling for the windings of such a machine can be achieved with little complexity, whereby tubular separation elements (19), running in the axial direction, are used as separating means, the interior of each of which forms a channel (20) for the coolant.

L'invention concerne une machine électrique comprenant un stator (10) pourvu d'un corps en tôle (11), dans lequel se trouve une pluralité de gorges (12) à orientation axiale. Dans chacune de ces gorges sont logées plusieurs demi-bobines (13, 14), superposées dans le sens radial et séparées les unes des autres par un élément d'espacement (19), ainsi que des canaux (20) parallèles aux demi-bobines (13, 14), ces canaux permettant le passage d'un agent de refroidissement pour refroidir les demi-bobines (13, 14). L'invention vise à améliorer notablement le refroidissement des enroulements à peu de frais. A cet effet, les éléments d'espacement se présentent sous forme de tubes (19) s'étendant axialement, dont l'espace intérieur constitue un canal (20) pour l'agent de refroidissement.

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