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Permanent-magnet synchronous motor, stator and rotor

A permanent magnet synchronous motor and rotor technology, used in synchronous motors with stationary armatures and rotating magnets, synchronous machine parts, etc., to eliminate cogging torque, eliminate additional pulsating axial force, reduce noise and vibration Effect

Inactive Publication Date: 2014-04-23
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The technical problem to be solved by the present invention is to reduce the noise and vibration of the permanent magnet synchronous motor

Method used

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  • Permanent-magnet synchronous motor, stator and rotor
  • Permanent-magnet synchronous motor, stator and rotor
  • Permanent-magnet synchronous motor, stator and rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Permanent magnet synchronous motor, including stator and rotor, the stator and rotor are coaxial;

[0048] In the stator, the tooth grooves are V-shaped oblique grooves;

[0049] said rotor, the poles of which are distributed in a direction parallel to the axis; or

[0050] In the stator, the tooth slots are distributed along a direction parallel to the axis;

[0051] The magnetic pole of the rotor has a V-shaped oblique pole.

[0052] Preferably, in the V-shaped chute or V-shaped oblique pole, the torsional inclination angle of the first half of the axis to one side is equal to the torsional inclination angle of the second half of the axis to the opposite side, and the axes of the first half and the second half are equal distance.

[0053] The permanent magnet synchronous motor of embodiment one, as Figure 4 As shown in , the stator with V-shaped inclined groove or the rotor with V-shaped oblique poles is twisted to one side in the first half of the axis by the an...

Embodiment 2

[0064] Based on the permanent magnet synchronous motor of Embodiment 1, the torsional inclination angle θ of the V-shaped chute or V-shaped oblique pole sk for:

[0065] (Formula 8)

[0066] In the formula, N c It is the least common multiple of the number of stator teeth Z and the number of rotor poles 2p, and i is a positive integer. However, choosing a larger i value may cause a sharp decline in the peak performance of the motor, and it is recommended that i=1.

[0067] For example, a permanent magnet synchronous motor plans to use a V-shaped skewed stator scheme, the number of stator teeth Z=24, and the number of rotor poles 2p=16, then its inclination angle θ sk for:

[0068] i can be 1, 2, 3, 4, 5, 6..., θ sk It can be 7.5°, 15°, 22.5°, 30°, 37.5°, 45°... .

Embodiment 3

[0070] Based on the permanent magnet synchronous motor of embodiment one, such as Image 6 , Figure 7 As shown, the V-shaped skew pole of the rotor is represented by N s segment composition, N s is an integer greater than or equal to 3.

[0071] In the permanent magnet synchronous motor of the third embodiment, the oblique poles of the rotor are dislocated in V-shaped segments, which can imitate the V-shaped oblique poles. In order to ensure the complete offset of the additional axial force, the segment number N of the rotor s It should be chosen as an even number as much as possible. In order to ensure the meaning of segmentation, when Ns is an even number, Ns>=3 should be selected, such as Image 6 As shown, the skew poles of the rotor should be misaligned by an angle θ ss for:

[0072] (Formula 9)

[0073] However, choosing a larger j value may cause a sharp drop in the peak performance of the motor, and j=1 is recommended.

[0074] For example, a permanent m...

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Abstract

The present invention discloses a permanent-magnet synchronous motor using a stator of a V-shaped chute or a rotor of a V-shaped oblique pole, turning the angle of inclination along one side in the forebody of the axle, and turning the same angle of inclination along the other side in the latter part of the axle. The axial distances of the two parts are same. Due to the chute and the oblique pole of the two parts adopted different inclined directions, the additional axial forces are in reverse, so they are mutually offset on a macro level, not only the cogging torque can be removed, but also the additional pulse axial force can be removed, decreasing the noise and the vibration. The present invention also discloses a permanent-magnet synchronous motor stator and a permanent-magnet synchronous motor rotor.

Description

technical field [0001] The invention relates to a motor, in particular to a permanent magnet synchronous motor and its stator and rotor. Background technique [0002] The cogging torque of the permanent magnet synchronous motor (Cogging Torque), or the positioning torque (Detent Torque), is the reluctance torque generated by the interaction between the cogging of the motor core and the permanent magnet of the rotor. Due to the existence of the permanent magnet synchronous motor stator cogging, when the permanent magnet rotor magnetic poles are in different positions relative to the stator cogging, the permeance of the main magnetic circuit changes. Even if the motor winding is not energized, the motor rotor tends to stop at several stable positions on the circumference due to the cogging torque. have: [0003] T cog = Σ k = 1 ∞ ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K21/02
Inventor 韩明张冠楠罗平亮任谊滨
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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