Electric vehicle hub motor

Abstract

The invention relates to an electric vehicle hub motor, and belongs to the technical field of electric vehicles. Through lengthening of working force arms of a motor stator magnetic field and a motor rotor magnetic field, the torque performance and the power density of the motor can be effectively improved, the working efficiency of the motor can be improved, the material cost of the motor can be reduced, and especially the expensive rare earth permanent magnet materials are effectively reduced. The hub motor is a ten-cun motor, the internal diameter of a rotor ranges from 213 mm to 250 mm, and the external diameter of a stator ranges from 206 mm to 246 mm. According to the electric vehicle hub motor, the internal diameter of the rotor and the external diameter of the stator are increased, the working force arms of the stator magnetic field and the rotor magnetic field are lengthened, and therefore the torque force and the power density of the hub motor are improved, and the electric vehicle hub motor is especially suitable for working under the severe working conditions such as a large vehicle load or mountainous areas with many steep hill roads.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles and relates to an electric wheel hub motor. Background technique [0002] As a green, energy-saving and environmentally friendly new energy vehicle, electric vehicles have become more and more popular with users due to their advantages of economy, convenience, energy saving, environmental protection, and easy operation. As one of the core components of electric vehicles, in-wheel motors, their The quality of performance determines the driving speed, cruising range and climbing performance of an electric vehicle; the existing in-wheel motors include rotors, stators, motor shafts, motor leads, etc., the stator and the motor shaft are axially positioned, and the outside of the rotor is Motor end cover, the side covers at both ends of the motor are fixed on the iron ring built into the hub that can freely rotate in the axial direction, and one side of the end cover is provided with a shoe-ty...

AI Technical Summary

Problems solved by technology

[0003] With the rapid development and popularization of the electric vehicle market, the load requirements of electric vehicles are getting higher and higher, and users have higher and higher requirements for the power performance of electric vehicles. Although many manufacturers increase the power of the motor , but due to the poor climbing performance of ordinary motors, it often happens that the motor cannot climb up the steep slope or the motor burns while climbing, and the failure rate of the motor rises sharply. For this reason, many manufacturers increase the size of the motor hub to improve the performance of the motor Power performance, but this brings problems such as increased cost of motors and tires, and poor versatility of models; among the existing electric wheel hub motors, ten-inch motors are the most common and the best for two-wheeled electric vehicles. The outer diameter of the hub motor is 254mm, which is a fixed value. If the working force arm of the stator and rotor magnetic field of the motor is maximized within the limited size of the hub, not only the torque performance and power density of the motor can be effectively improved, but also the Motor operating efficiency and reduced motor material cost

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