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Stator and rotor structure of permanent magnet hub motor

A hub motor, stator and rotor technology, applied in the direction of magnetic circuit shape/style/structure, winding conductor shape/style/structure, magnetic circuit rotating parts, etc., can solve problems such as temperature rise, unstable speed torque output, etc. , to achieve the effect of reducing the rotor structure, reducing the cogging torque, and preventing the motor performance

Pending Publication Date: 2021-03-12
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main content of the present invention is to provide a stator-rotor structure of a permanent magnet hub motor to solve the problems of unstable rotational speed torque output and high temperature rise of the magnetic pole embedded motor under high-speed operation

Method used

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  • Stator and rotor structure of permanent magnet hub motor
  • Stator and rotor structure of permanent magnet hub motor
  • Stator and rotor structure of permanent magnet hub motor

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described examples are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left" and "right" are based on the orientations and positional relationships shown in the drawings, and are only for convenience of description It does not indicate or imply that the referred part must have a specific orientation and operate in a specific orientation, and thus should not be constr...

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Abstract

The invention discloses a stator and rotor structure of a permanent magnet wheel hub motor. The structure comprises a stator, a rotor, a stator water hole, a rotor auxiliary groove and a plurality ofHalbach array permanent magnets, and adopts a structure of an inner stator and an outer rotor in order to enable the motor to have better output torque and rotational inertia, exciting windings are placed in winding grooves of the inner stator, two circular holes are formed in stator teeth, a water pipe is connected into the two circular holes to facilitate heat dissipation of the motor, the outerrotor is of a permanent magnet embedded type, each permanent magnet is magnetized through a Halbach array, and a plurality of Halbach array magnets are alternately arranged on the outer rotor in a Vshape and a W shape and are evenly distributed in the axial direction of a rotating shaft. According to the invention, the high magnetism, shielding property and unilateral magnetism gathering effectof the Halbach array magnetic pole can be utilized to reduce use of the permanent magnet, reduce the magnetic flux leakage and enhance the sinusoidal property of the air-gap magnetic field; and the purposes of reducing the waveform distortion rate and controlling the temperature rise are achieved by forming the auxiliary grooves in the rotor and forming the boiling water holes in the stator, so that the motor operates more safely and stably.

Description

technical field [0001] The invention relates to the technical field of motor structure, in particular to a stator-rotor structure of a permanent magnet hub motor. Background technique [0002] As new energy electric vehicles enter the public's field of vision, the permanent magnet in-wheel motor's compact structure and high-efficiency transmission are more in line with the development requirements of high efficiency, lightweight and intelligent electric vehicles. At present, most in-wheel motors use the stator slot structure, and the outer rotor is divided into magnetic pole surface mount type and embedded type. Compared with the surface mounted type, the biggest advantage of the embedded type is that the magnetic pole structure is more stable and suitable for high-intensity and high-speed working conditions, but Because the thin-walled rotor structure is easy to vibrate during high-speed operation, the air gap magnetic flux density distribution of the motor is uneven, resul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/16H02K3/28H02K1/20H02K1/14H02K1/28
CPCH02K1/146H02K1/165H02K1/20H02K1/2786H02K1/28H02K3/28
Inventor 王立坤邢洪凯龚浩文
Owner HARBIN UNIV OF SCI & TECH
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