Low-cost alternating pole permanent magnet hub motor for electric vehicle drive

Abstract

The invention discloses a low-cost alternating pole permanent magnet hub motor for electric vehicle drive, and belongs to the field of motor body design and manufacturing. The motor comprises a coaxial outer rotor 1 and an inner stator 2. The permanent magnets on the outer rotor adopt an alternating pole structure, and the magnetizing directions of the permanent magnets are the same along the radial direction, i.e. uniformly pointing to or deviating from the center of the circle along the radial direction.The salient pole iron cores between the permanent magnets act as virtual poles, the permanent magnets and the virtual poles are alternately and uniformly distributed on the inner circumference of the outer rotor, and the inner stator 2 includes armature teeth 5 and tooth shoes 6. The electromagnetic performance of the motor is equivalent to the permanent magnet motor performance of the conventional N-Spole array, and the usage of the permanent magnets is greatly reduced and thus the cost of the motor is effectively reduced.

Description

technical field [0001] The invention belongs to the field of motor design, in particular to an alternating pole permanent magnet rotating motor for driving an electric wheel hub. Background technique [0002] Due to the depletion of traditional fossil energy and the deterioration of the environment, diesel locomotives that consume fossil energy are gradually replaced by emerging electric drive tools. The direct drive motor has been more and more widely used in the field of industrial equipment applications and vehicles due to its advantages of high reliability and low vibration and noise. However, due to the high torque density requirement, direct drive motors are heavy and bulky, thus restricting their popularization. In recent years, permanent magnet motors have attracted more and more attention due to their excellent torque density and high efficiency. However, the high price of permanent magnets limits the further popularization and use of permanent magnet motors. Mor...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is in order to solve the existing electric vehicles (such as electric bicycles, electric cars, electric tractors) wheel hub drive permanent magnet motor with a large amount of rare earth permanent magnet materials, high cost, improve the sine degree of back EMF, reduce the Torque pulsation, improve running stability, propose an outer rotor permanent magnet hub motor based on alternating pole structure

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