Patent ID: 8207644

Claim:
A hybrid cascading lubrication and cooling system ( 200 , 400 ) for an electrical machine ( 102 ), the electrical machine ( 102 ) comprising an inner nested stage ( 444 ) and an outer nested stage ( 446 ), wherein the inner nested stage ( 444 ) is radially nested about a central axis ( 216 ) of the electrical machine ( 102 ) with respect to the outer nested stage ( 446 ), the hybrid cascading lubrication and cooling system ( 200 , 400 ) comprising: an oil pump ( 222 ) coupled to an oil pump inlet tube ( 226 ) to draw oil from an oil sump ( 224 ); a cooling core ( 230 ) configured to distribute pumped oil within the electrical machine ( 102 ); and a rotor member ( 212 ) coupled to the inner nested stage ( 444 ) and the outer nested stage ( 446 ) of the electrical machine ( 102 ), rotor member ( 212 ) configured to centrifugally pump oil from the cooling core ( 230 ) through inner radial holes ( 424 ) and outer radial holes ( 436 ) in the rotor member ( 212 ) upon rotation about the central axis ( 216 ) of the electrical machine ( 102 ).