Self-fan-cooling axial flux motor with built-in axial flow fan

Abstract

The invention provides a self-fan-cooling axial magnetic flux motor with a built-in axial flow fan. The self-fan-cooling axial magnetic flux motor adopts a single-stator / double-rotor topology. An axial flow fan is located between the two rotors and fixed to the shaft. An air path enters from the outer circumferential vent hole in one side of the casing, and air passing through the gap between thenon-driving end rotor magnetic steel and the stator core and air passing through the gap between the axial flow fan and the driving end rotor magnetic steel and the stator core flow out from the outercircumferential vent hole in the other side of the casing. On one hand, the air cooling scheme of the axial flow fan of the rotor improves the convective heat transfer coefficients of the magnetic steel end surface, the rotor back iron end surface, the end cover end surface and the inner circumferential surface of the stator hub; by the adoption of the scheme that the axial flow fan is integratedin the motor for air cooling, heat generated by the motor can be rapidly diffused into outside air, so that the heat exchange efficiency is improved, and the power density and the torque density areremarkably improved.

Description

technical field [0001] The invention relates to an integrated starter / engine applied in the fields of emergency power generation and new energy vehicles, in particular to a self-fan-cooled axial flux motor with a built-in axial fan. Background technique [0002] In the field of emergency power generation and new energy vehicles, the motors are mostly AC permanent magnet synchronous motors or AC asynchronous motors with radial flux. Due to the large axial installation size of traditional radial flux motors, the power density and efficiency are low. The application of these occasions with strict space requirements and high power density requirements is limited. [0003] Conventional low-power axial flux motors generally adopt fin cooling solutions on the frame or end covers on both sides. Under the conditions of large assembly errors between the stator core and end covers, large loads or high speeds, the motor generates A large amount of heat is exchanged only by fins or wate...

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