Motor with mixed-flow fan for circulating inner and outer air paths

Abstract

The invention relates to a power drive system of an electric automobile, in particular to a motor with a mixed-flow fan for circulating inner and outer air paths. The invention solves the problems that the traditional electronic automobile has low reliability, heat radiation at low speed and poor effect when a self-ventilation motor is used as well as large size, difficult heat radiation and low peak powder and overload capacity when a fully-closed motor is used. The power drive system comprises an enclosure, an end cover, an inner cooling air path and a rotor; a mixed flow forced cooling fan is arranged on a non-driving end shaft of the motor; an engine seat shell of the enclosure is provided with U-shaped channel steel closely covering on paired air holes to form an enclosure inner air duct; a fan cover is arranged outside the enclosure, covers U-shaped channel steel and then is welded between two flanges form an enclosure outer air duct together with the engine seat shell; and air holes are formed on the two flanges of the enclosure as well as at the position of the motor end cover, which corresponds to the enclosure outer air duct. The device can better protect the inside of the motor from being intruded by dust and rain water and can ensure heat dissipation, smaller volume and weight requirement.

Description

technical field [0001] The invention relates to a power drive system of an electric vehicle, in particular to a traction system of the electric vehicle, in particular to a motor with a mixed-flow fan for internal and external air circulation. Background technique [0002] Electric vehicle is a new energy green vehicle that has emerged in recent years. It uses electric energy as the power source and drives the vehicle through a power traction system composed of a controller and a traction motor. Compared with traditional fuel vehicles, this kind of vehicle has the advantages of zero emission, no pollution, energy saving, consumption reduction, and environmental protection. The core of the electric vehicle is the power drive system, including the controller and the traction motor. The particularity of the electric vehicle’s operating mode, operating environment, and technical performance determines its special requirements for the traction motor, and the requirements for the i...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of low reliability and poor heat dissipation effect at low speed when the self-ventilated motor with low protection level is used for the traction motor of the existing urban electric vehicle; while the fully enclosed motor has the problems of large volume, heavy weight and poor heat dissipation. Problems with defects such as difficulty, peak power and low overload capacity, provide a motor with a mixed-flow fan for internal and external air circulation

There are cooling fins on the outer surface of the housing

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