Patent ID: 8198764
Filing Date: 2012-06-12
Classification: H02K,Y02E

Abstract:
1. An arrangement for cooling of an electrical machine, wherein the electrical machine comprises a rotor, a stator and an air-cooling arrangement, the stator comprises a plurality of stacked laminate-plates, the laminate-plates are positioned and fixed by a structural support and by a plurality of end-plates in relation to a central-part of the stator to form an air-gap between the rotor and the stator, an inner cavity is formed by the end-plates, the stator and the laminate-plates: an outer cavity, which includes the air-gap, is formed by the end-plates, the stator, and an internal surface of the rotor, slits which provide an air path from the inner cavity to the outer cavity via the air-gap of the outer cavity are located between at least a portion of the laminate plates, and an air circuit is formed via the air path and openings of the end-plates in order air to circulate air from the inner cavity back to the inner cavity, wherein the air-cooling arrangement is connected by attachments with the stator such that the air-cooling arrangement is located within the inner cavity, the cooling air-cooling arrangement comprises a fan configured to blow air from the inner cavity through the air circuit such that the blown air passes along the internal surface of the rotor through the openings of the end-plates and passes along the central-part of the stator and back to the air-cooling arrangement.