Oil internal-cooling high-power density hub permanent magnet motor for electric vehicle

Abstract

The invention discloses an oil internal-cooling high-power density hub permanent magnet motor for an electric vehicle, which comprises a shaft. A front end cover and a rear end cover are respectively sleeved at the front and rear ends of the shaft; the front end cover and the rear end cover are respectively connected with the shaft by bearings; an outer rotor sleeve is fixedly connected between the front and rear end covers; a surface-mount magnetic steel is adhered inside the outer rotor sleeve; a stator bracket fixedly connected with the shaft is arranged between the front and rear end covers; a stator adopting a fractional-slot winding structure is arranged on the stator bracket; an oil charging hole is arranged on the front end cover; the contact position of the front end cover and the shaft is sealed in a labyrinth mode; and the contact positions of the front and rear end covers and the outer rotor sleeve, the contact position of the oil charging hole and a stopper and the contact position of the rear end cover and the shaft are sealed by rubber rings. According to the hub permanent magnet motor adopting the outer rotor structure, a great of transmission parts are saved, the vehicle has simpler structure and various complex driving modes can be implemented.

Description

technical field [0001] The invention relates to an internal cooling type high power density hub permanent magnet motor, in particular to an oil internal cooling type motor cooling method. Background technique [0002] With the continuous deterioration of the world's natural environment and the tight supply of fossil energy, electric vehicles are an effective path to ensure the flexibility of human mobility and achieve sustainable development of the automotive industry while reducing dependence on fossil fuels and environmental pollution. At present, the production and use of automobiles in the world are huge and growing rapidly. Human beings are facing more and more environmental problems and energy depletion problems, and will face severe challenges. Designing and developing a high-efficiency, environment-friendly and safe vehicle is the only way to realize the sustainable development of transportation. As a new type of clean energy, electric energy will become an inevitab...

AI Technical Summary

Problems solved by technology

However, in the design and practical application of the motor, there are many problems that we cannot ignore, such as the temperature rise of the motor, low power density, etc.

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