US Patent 10008908 Electric machine for vehicle

A vehicle electric machine includes a rotor, and a stator having a core with an end face and end windings adjacent to the end face. An annular cooling trough has an outer sidewall and a bottom. The trough is connected to the end face such that the bottom engages the core, and the sidewall, bottom and end face cooperate to define an open channel around the end windings configured to receive fluid therein.