Stator offset electric vehicle hub motor

Abstract

The invention relates to a stator offset electric vehicle hub motor. The stator offset electric vehicle hub motor comprises a rotor, a stator and a motor middle shaft. The stator and the motor middle shaft are axially positioned, motor end covers are arranged on the outer side of the rotor, and the end covers at the two ends of a motor are fixed to an iron ring arranged in a hub capable of freely rotating in the axial direction. The rotor comprises a rim and an inner ring, the inner ring comprises a magnetic conductive ring iron ring and a fixing inner ring, the internal diameter of the magnetic conductive ring iron ring is larger than that of the fixing inner ring, the fixing inner ring is fixedly connected to the inner wall of the rim, the magnetic conductive ring iron ring is fixedly connected to the outer side of the rim, and the motor stator and the magnetic conductive ring iron ring are concentrically arranged and offset relative to the rim. The size of the magnetic conductive ring iron ring is increased, the motor stator and the magnetic conductive ring iron ring are concentrically arranged and offset relative to the rim, the internal diameter of the rotor and the external diameter of the stator are increased, the working arms of force of magnetic fields of the stator and the rotor are increased, and therefore the torque and the power density of the hub motor are improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles and relates to a stator bias 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 wit...

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, some manufacturers improve the motor by increasing the size of the motor hub. However, it brings problems such as the increase in the cost of motors and tires and the poor versatility of models; among the existing electric wheel hub motors, ten-inch motors are the most common and the two-wheeled electric vehicles have the best versatility The motor, and the outer diameter of the motor is 254mm 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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