Motor air-cooled impeller, dual-duct motor and electric vehicle

Abstract

A motor air-cooling impeller is applied to a motor of which radial width of a stator ventilation groove is 12 millimeter or below. The motor air-cooling impeller comprises a first disc surface, a second disc surface, a third disc surface, a first blade and a second blade, wherein the first disc surface, the second disc surface and the third disc surface are coaxially and sequentially arranged in alamination way at intervals, the first blade is fixed between the first disc surface and the second disc surface along a radial direction, the second blade is fixed between the second disc surface and the third disc surface along the radial direction, the first disc surface comprises a shaft sleeve, the shaft sleeve can sleeve a motor rotation shaft, the second disc surface and the third disc surface are circular annular surfaces, a first air duct hole is formed in the center of the second disc surface, the inner diameter of the first air duct hole is larger than the external diameter of theshaft sleeve, a second air duct hole is formed in the center of the third disc surface, and the inner diameter of the second air duct hole is larger than the inner diameter of the first air duct hole.In the motor air-cooling impeller, a first air duct and a second air duct which are corresponding to a rotor interior and a rotor surface are arranged, the two air ducts are separated by a first diversion ring, the rotor is fully cooled, and the cooling performance of the motor is improved. The invention also provides a dual-air duct motor with the motor air-cooling impeller and an electric vehicle.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an air-cooled impeller of a motor, a double air duct motor and an electric vehicle. Background technique [0002] The current electric vehicles have higher requirements on the protection level of the motor, and the general minimum requirements of the OEMs have reached the IP67 level, or even higher, so the motor is required to be almost fully enclosed; in addition, in order to meet the needs of vehicle body assembly and battery life, The motor is required to be small in size and light in weight under the premise of satisfying performance. When the drive motor of a closed electric vehicle, especially the permanent magnet synchronous motor, is running at high speed for a long time, the heat of the rotor is difficult to dissipate, resulting in a high temperature of the rotor; at high temperature, the magnet steel of the permanent magnet synchronous motor has the risk of irreversible...

AI Technical Summary

Problems solved by technology

The air-cooled impeller of the motor with single air channel used in the existing motor cannot realize the wind passing through the rotor ventilation hole and the air gap at the same time, and the cooling effect is poor

Therefore, the existing motor rotor air cooling scheme has a poor cooling effect and cannot effectively cool down the magnetic steel

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