Abstract: Thermal management techniques for an electric motor of a vehicle, the electric motor comprising a rotor and a stator include an oil supply system configured to supply oil for cooling the electric motor, end plates defined by the rotor, the end plates defining a first portion of an internal oil channel configured to route oil through the rotor to thereby cool the rotor, and a hollow rotor shaft defined by the rotor, the hollow rotor shaft defining a second portion of the internal oil channel, wherein the end plates are configured to retain the rotor in place and further define external oil channels configured to spray/splash the oil that flowed through the internal oil channel onto windings of the stator to thereby cool the stator.

Abstract: Thermal management techniques for an electric motor of a vehicle, the electric motor comprising a rotor and a stator include an oil supply system configured to supply oil for cooling the electric motor, end plates defined by the rotor, the end plates defining a first portion of an internal oil channel configured to route oil through the rotor to thereby cool the rotor, and a hollow rotor shaft defined by the rotor, the hollow rotor shaft defining a second portion of the internal oil channel, wherein the end plates are configured to retain the rotor in place and further define external oil channels configured to spray/splash the oil that flowed through the internal oil channel onto windings of the stator to thereby cool the stator.

Abstract: A partially segmented rotor assembly for an electric motor and a method for the same is provided. The partially segmented rotor assembly includes a first rotor segment and a plurality of second rotor segments. The first rotor segment has a plurality of first poles wound with a wire and defines a first circumferential gap between the wire of each adjacent pair of the first poles. Each second rotor segment has a second pole wound with the wire and is rigidly attached to the first rotor segment in a respective one of the first circumferential gaps to form a plurality of second circumferential gaps between the wire of each first pole and the wire of the adjacent second poles. The first and second rotor segments are configured to cooperate with one another to minimize the second circumferential gaps.