Cooling Stator Coils of an Electric Motor

摘要

Performance of an electric motor can be improved if coolant is provided to the coils of the stator. An electric motor is disclosed that has a shaft onto which the rotor is secured. The motor has a stator that is mounted on bearings that are mounted on the shaft. The stator has a plurality of coils. A coolant guide is provided that fills voids between the groups of windings. The coolant guide has a plurality of fingers with the fingers arranged between adjacent pairs of coils. The coolant guide has internal passages to accept pressurized coolant and outlet holes to spray coolant onto the coils. In other embodiments, the fingers guide coolant to reach all coils under the force of gravity.

主权项

1. An electric motor, comprising:
a housing; a shaft; two bearings mounted between the shaft and the housing; a rotor secured to the shaft and located between the bearings; a stator mounted in the housing and slid over the rotor; and a coolant guide having a plurality of fingers, wherein the stator has a plurality of coils and the fingers of the coolant guide are arranged between adjacent pairs of coils.