Patent ID: 8198762
Filing Date: 2012-06-12
Classification: H02K

Abstract:
1. An electric machine comprising: a stator; a plurality of winding end turns that are mounted to the stator and are generally axisymmetric with respect to one another, with interspaces between pairs of adjacent winding end turns, the winding end turns each defined by layers of winding, with spaces between the layers of each said winding end turn tangentially oriented relative to the machine, the spaces of each of the winding end turns communicating with the interspaces on opposite side of the winding end turn; a plurality of coolant input paths, each communicating with a source of coolant and each defined in one of the interspaces extending radially relative to a center of the electric machine and between a corresponding pair of the winding end turns; a plurality of internal coolant paths defined tangentially relative to the machine, each internal coolant path substantially extending at least through said spaces defined between the layers of a corresponding one of the winding end turns and communicating with a corresponding one of the coolant input paths; and a plurality of coolant output paths, each communicating with a corresponding pair of the internal coolant paths.