Few-harmonic consequent-pole hub motor

An in-wheel motor, alternating pole technology, applied in electromechanical devices, electrical components, electric components, etc., can solve the problem of asymmetric air gap magnetic density of alternating pole permanent magnet motor, save the amount of permanent magnet, wide application prospect, simplify Effects of machining and assembly processes

Active Publication Date: 2022-01-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] In order to solve the technical problems mentioned in the above-mentioned background technology, the present invention proposes a less harmonic alternating pole hub motor to solve the problem of air gap flux density of alternating pole permanent magnet motor Even-order harmonic problem of back emf caused by asymmetry improves the electromagnetic torque characteristics of the motor

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  • Few-harmonic consequent-pole hub motor
  • Few-harmonic consequent-pole hub motor
  • Few-harmonic consequent-pole hub motor

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Embodiment Construction

[0020] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] The present invention designs a hub motor with less harmonics alternating poles, such as figure 1 As shown, it includes an inner stator 2 composed of three 9-tooth stator modules 2-1, 2-2 and 2-3, and an outer permanent magnet rotor 1, and the three 9-tooth stator modules are evenly distributed in the circumferential direction. The outer permanent magnet rotor 1 includes a non-magnetically conductive component 1-1, a magnetically permeable component 1-5, a circumferentially magnetized permanent magnet 1-3 and a radially magnetized permanent magnet 1-4. The non-magnetically conductive component 1-1 and the magnetically permeable component 1-5 are fastened together through dovetail grooves / dovetail teeth 1-2. An independent air gap 3 is formed between the inner stator 2 and the outer permanent magnet rotor 1 . Circumferentially magne...

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Abstract

The invention discloses a few-harmonic consequent-pole hub motor, which comprises an outer permanent magnet rotor and an inner stator, wherein an air gap is formed between the outer permanent magnet rotor and the inner stator, the outer permanent magnet rotor comprises a non-magnetic assembly and a magnetic assembly located at the inner side of the non-magnetic assembly, the non-magnetic assembly and the magnetic assembly are assembled together through a connecting piece structure, the outer permanent magnet rotor comprises a plurality of annularly magnetized permanent magnets and radially magnetized permanent magnets, the annularly magnetized permanent magnets are spoke permanent magnets, the radially magnetized permanent magnets are surface-mounted permanent magnets, the annularly magnetized permanent magnets and the radially magnetized permanent magnets are alternately arranged one by one, the inner stator is composed of 3n stator modules, each stator module comprises nine stator teeth, and a three-phase armature winding is distributed on each stator module. The motor is simple in structure, not only has the magnetism gathering effect of a Spoke permanent magnet rotor structure, but also can eliminate even-order harmonics in counter electromotive force, and improves the electromagnetic torque quality of the motor.

Description

technical field [0001] The invention belongs to the field of hub motors, and in particular relates to a hub motor with less harmonics and alternating poles. Background technique [0002] High magnetic energy permanent magnet materials enable the motor to have the advantages of high torque density, high power density and high efficiency. In recent years, with the increase in the price of rare earth materials, permanent magnet motors with low rare earth alternating poles have received extensive attention. However, the alternating pole rotor structure will lead to air-gap flux density even-order harmonics, and improper selection of motor pole-slot coordination will induce back-EMF even-order harmonics in the armature winding, deteriorating the output electromagnetic torque performance of the motor. In order to reduce the influence of even-order harmonics of the air-gap magnetic density of alternating pole permanent magnet motors on the no-load back EMF waveform, the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/2791H02K1/16
CPCH02K1/2786H02K1/165Y02T10/64
Inventor 李烽段朝伟高翔邓岩松王凯朱姝姝刘闯徐少云高培伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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