Jet impingement cooling of electric motor end-windings
AssigneeBallard Power Systems Inc.
InventorsKanghua Chen, Abul Masrur, Sayeed Ahmed, Vijay K Garg
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Abstract
An assembly for cooling an electric motor, the assembly comprising a housing, a stator, a rotor, a winding, an end-winding integrally formed with the winding, and a jet impingement device operable for exposing the end-winding to a temperature controlled stream of fluid. A method for transferring heat between a stream of impinging fluid and the surface of an electric motor end-winding. An electric motor comprising a jet impingement cooling assembly.
Claims18
An electric motor cooling assembly, comprising:
- a housing;
- a stator disposed within the housing, the stator operable for generating a magnetic field;
- a rotor disposed within the housing, the rotor operable for receiving the magnetic field and generating a torque;
- a winding operatively connected to the stator;
- an end-winding integrally formed with the winding;
- a jet impingement device operable for exposing the end-winding to a temperature controlled stream of fluid, the jet impingement device including a jet nozzle oriented to direct the temperature controlled stream onto an exterior surface of the end-winding.
A method for transferring heat between a stream of fluid impinging a surface of an electric motor end-winding of an electric motor, comprising:
- controlling the temperature of a volume of fluid;
- establishing a stream of fluid from the volume of fluid to an inlet;
- delivering a jet stream of the temperature controlled fluid from the inlet to the end-winding such that heat is transferred between the surface of the end-winding and the jet stream of fluid impinging the surface of the end-winding;
- and
- removing fluid from the electric motor via an outlet.
An electric motor, comprising:
- a housing;
- a stator disposed within the housing, the stator operable for generating a magnetic field;
- a rotor disposed within the housing, the rotor operable for receiving the magnetic field and generating a torque;
- a winding operatively connected to the stator;
- an end-winding comprising the ends of the stator winding, integrally formed with the stator winding;
- a jet impingement device operable for exposing the end-winding to a temperature controlled jet stream of fluid.
Dependencies are inferred from the claim text.