Patent ID: 8134261
Filing Date: 2012-03-13
Classification: F04D,H02K

Abstract:
1. A cooling arrangement for an electrical machine comprising: a main cooling air circulation having a centrifugal fan at least in one end of the machine; and a coil end extending out of a sheet pack and the main cooling air circulation flowing through at least an air space associated with the coil end and an outer surface of a stator, wherein the centrifugal fan is fitted into the air space associated with the coil end, wherein a circulating fan is arranged in an immediate vicinity of the centrifugal fan for generating a coil end circulation that circulates air at least in an area of the coil ends, and wherein the centrifugal fan comprises an outer deflector plate and an inner deflector plate perpendicular to the shaft, and the circulating fan is attached to the inner deflector plate.