Electric vehicle-mounted complete closed internal liquid cooling, external wind cooling type switch reluctance motor

Abstract

The present invention relates to a totally closed internal liquid cooling and external wind cooling type switch reluctance electric machine carried by electrically-propelled vehicle, comprising a sealing machine casing, a stator, a rotor, an internal liquid cooling and external wind cooling heat dispersion mechanism and an electric machine waterproof structure. The present invention is characterized in that the heat dispersion mechanism is capable of making the stator winding obtains the double heat dispersion effect of the internal liquid cooling and the external wind cooling at the same time, thereby solving the problem that the stator winding has a halfway heat dispersion. In addition, dedicated gland seals are arranged at the end cap opening of the electric machine, the ends of the axes and the wiring mouthpiece, achieving the aim of the electric machine with a good waterproof performance. The invention has the advantages of large torque, good dynamic performance, high efficiency, good energy saving effect, low noise and reliable seal. The technique is capable of effectively controlling the temperature rise of the electric machine when running up, in particular to the temperature rise of the end part of the stator winding. The present invention is capable of effectively waterproofing, guaranteeing the safe operation of the electric machine on the wet conditions or the seeper of the road surfaces, thereby increasing the work efficiency, the safety performance and the degree of protection of the electric machine, extending the service time.

Description

technical field [0001] The invention relates to electric vehicle motor technology, in particular to a fully enclosed internal liquid-cooled and external air-cooled switched reluctance motor for electric vehicles. This is a vehicle-mounted drive motor with strong driving power, good heat dissipation performance, and good waterproof performance. When the drive motor runs at high speed, the cooling system can effectively control the temperature rise, especially the temperature rise at the end of the stator winding of the switched reluctance drive motor. Background technique [0002] At present, the types of electric motors driven by electric vehicles include asynchronous motors, permanent magnet brushless motors and switched reluctance motors. The torque fluctuation of the asynchronous motor is small, but the efficiency is low, especially in the low speed stage; the permanent magnet brushless motor has high efficiency, but the manufacturing process is complicated, there is dem...

AI Technical Summary

Problems solved by technology

In addition, if the heat dissipation ribs of the driving motor are parallel to the axial direction of the car wheel, the wind direction is from front to rear along the car body and perpendicular to the axial direction of the motor during driving, that is, the wind moves along the radial direction of the motor, resulting in poor heat dissipation of the motor. uniform

If the heat dissipation ribs on the motor frame are along the motor axis, the forward heat dissipation ribs of the motor will receive the wind better, but it will affect the air volume of the heat dissipation ribs behind it, which will also cause uneven heat dissipation of the motor.

Experiments have shown that if the car is completely driven, the wind resistance formed by the relative air movement will dissipate heat from the motor. When the electric car stops running, the heat dissipation of the motor will be completely carried out by conduction and radiation. The heat dissipation efficiency is low, and the temperature of the motor will easily rise. Relatively high, affecting the working efficiency and service life of the drive motor

The switched reluctance motor has its special structure—the winding is concentrated, so there is often the problem of poor heat dissipation of the stator winding, especially its end. The resulting defect is that as the speed increases or the motor runs for a long time, the It will cause a large temperature rise, which will reduce the working efficiency of the motor, and long-term operation will cause the insulation of the stator winding to age and reduce the service life

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