Patent ID: 8067865
Filing Date: 2011-11-29
Classification: H02K

Abstract:
1. An electric motor/generator low hydraulic resistance cooling mechanism, comprising: a cooling stator case having an inner coaxial surface and an outer coaxial surface, said inner coaxial surface defining a generally cylindrical cavity for receiving a stator in heat transference contact with said inner coaxial surface; an outer housing having first and second inlet ports and an outlet port configured to fit onto said hollow cooling stator case; and spiral groove cooling passages provided in said outer coaxial surface, the spiral groove cooling passages disposed between the first inlet port and the outlet port defining a cooling fluid flow path moving in a first radial direction, the spiral groove cooling passages disposed between the second inlet port and the outlet port defining a cooling fluid flow path moving in a second radial direction, the first radial direction being opposite to the second radial direction.