Electric machine rotor cooling method

摘要

An electric motor coupled to a driven device of a vehicle. The electric motor includes a rotor and a shaft coupled to the rotor. The rotor has at least one radially oriented cavity and at least one fluid channel. The fluid channel extends in a generally axial direction. The fluid channel is fluidly connected to the at least one radially oriented cavity. The shaft has a fluid passageway therein. The at least one radially oriented cavity has a fluid connection to the fluid passageway of the shaft. The at least one radially oriented cavity leads to a radial exit from the rotor for a flow of fluid therefrom.

主权项

1. A vehicle, comprising:
a driven device; and an electric motor coupled to and driving said driven device, the electric motor including: a rotor having at least one radially oriented cavity and at least one fluid channel, said fluid channel extending in a generally axial direction, said fluid channel being fluidly connected to said at least one radially oriented cavity, said at least one radially oriented cavity having a first portion radially inward of said fluid channel and a second portion radially outward of said fluid channel; and a shaft coupled to said rotor, said shaft having a fluid passageway therein, said at least one radially oriented cavity having a fluid connection to said fluid passageway, said at least one radially oriented cavity leading to a radial exit configured for a flow of fluid from said rotor.