Patent ID: 7791230
Filing Date: 2010-09-07
Classification: H02K

Abstract:
1. A rotor for a dynamoelectric machine having one or more windings, said windings comprised of one or more turns, said turns having one or more outlet ducts located near a chimney, which when stacked one on top of another form substantially radially oriented passages, wherein the heat transfer performance of a portion of said rotor can be improved by locating two or more circumferentially spaced and adjacent radial ducts near said chimney, where flow into the two or more circumferentially spaced and adjacent radial ducts is fed by a common subslot and flow through the two or more circumferentially spaced and adjacent radial ducts is in the same direction; wherein, the flow through the two or more circumferentially spaced and adjacent radial ducts draws heat away from the chimney, and wherein the two or more circumferentially spaced and adjacent radial ducts and chimney are located in at least one of the slot end region and end winding region of the rotor.