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Stator core manufacturing method

A technology of stator iron core and manufacturing method, which is applied in the manufacture of stator/rotor body, motor generator, electrical components, etc., can solve problems such as the increase of cogging torque, suppress processing errors, and solve the problem of cogging torque. The effect of increasing and suppressing the effect is good

Inactive Publication Date: 2019-11-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the existing technology, develop and design a stator core manufacturing method, process the stator core by rotating and stacking the stator punches in sections along the axial direction, and disperse the processing of the inner circle of the stator Error, solve the problem of cogging torque increase

Method used

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Experimental program
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Effect test

Embodiment 1

[0032] The specific process of the stator core manufacturing method involved in this embodiment includes three steps: determining the rotation angle, dividing the stator punching sheet equally, and processing the stator punching sheet:

[0033] (1) Determine the rotation angle: According to the shape of the permanent magnet motor stator punching plate is square, the number of slots Q is 12, determine the rotation angle α of the stator core r is 90°;

[0034] (2) Equally divided stator core: based on the rotation angle α of the stator core r is 90°, the stator core is divided into two sections along the axial direction, and the total number of stator cores is 2;

[0035] (3) Process the stator core: stack the two stator cores separately, according to the rotation angle α r Arranged in sequence along the axial direction at 90°, laminated as a whole to complete the processing of the stator core, such as Figure 5 shown.

[0036] The stator core involved in this embodiment is ...

Embodiment 2

[0038] The specific process of the stator core manufacturing method involved in this embodiment includes three steps: determining the rotation angle, dividing the stator punching sheet equally, and processing the stator punching sheet:

[0039] (1) Determine the rotation angle: According to the shape of the permanent magnet motor stator punching plate is square, the number of slots Q is 12, determine the rotation angle α of the stator core r is 90°;

[0040] (2) Equally divided stator core: based on the rotation angle α of the stator core r is 90°, the stator core is divided into 4 sections along the axial direction, and the total number of stator cores is 4;

[0041] (3) Process the stator core: stack the 4 segments of the stator core separately, according to the rotation angle α r Arranged in sequence along the axial direction at 90°, laminated as a whole to complete the processing of the stator core, such as Figure 7 shown.

[0042] The stator iron core involved in thi...

Embodiment 3

[0044] The specific process of the stator core manufacturing method involved in this embodiment includes three steps: determining the rotation angle, dividing the stator punching sheet equally, and processing the stator punching sheet:

[0045] (1) Determine the rotation angle: According to the shape of the permanent magnet motor stator punching plate is circular, the number of slots Q is 12, determine the rotation angle α of the stator core r is 90°;

[0046] (2) Equally divided stator core: based on the rotation angle α of the stator core r is 90°, the stator core is divided into two sections along the axial direction, and the total number of stator cores is 2;

[0047] (3) Process the stator core: stack the two stator cores separately, according to the rotation angle α r Arranged in sequence along the axial direction at 90°, laminated as a whole to complete the processing of the stator core, such as Figure 9 shown.

[0048] The stator core involved in this embodiment i...

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Abstract

The invention relates to the technical field of a motor stator core manufacturing method, and specifically relates to a stator core manufacturing method. The specific process comprises three steps ofdetermining a rotation angle, equally dividing stator punching sheets and processing the stator punching sheets. Based on the fact that the inner circle of a stator core can generate approximate elliptical deformation to a certain extent when the stator punching sheets are punched, air gap magnetic conductance harmonic waves of multiple orders of the number of poles can be generated, and the cogging torque is significantly increased, the stator punching sheets are axially rotated, laminated and processed into the stator core, the processing error of the inner circle of the stator core is dispersed, and the corresponding air gap magnetic conductance harmonic waves are weakened, so that the problem that the cogging torque of a permanent magnet motor is increased due to the processing error is effectively solved. The process is simple, the additional arrangement of a processing device is not needed, the production efficiency is high, the number of segments and the rotation angle are selected according to the shape and the number of slots of the stator punching sheets, the cogging torque caused by the processing error can be effectively inhibited, and the more the number of the segments of the stator core is, the better the inhibition effect of the cogging torque is.

Description

Technical field: [0001] The invention belongs to the technical field of manufacturing methods for stator iron cores of motors, and in particular relates to a manufacturing method for stator iron cores. The manufactured stator iron cores can effectively suppress the cogging torque of permanent magnet motors. Background technique: [0002] A permanent magnet motor is composed of a stator 1, a rotor 2 and a permanent magnet 3, with figure 1 As an example, the stator 1 has 12 slots, the rotor 2 has 10 poles, and the permanent magnet 3 has a surface mount structure. The ever-increasing application fields and demand put forward higher requirements on the performance of permanent magnet motors; as one of the unique problems of permanent magnet motors, cogging torque will cause vibration and noise to the motor, especially in low speed and direct drive applications more obvious in . Based on this, cogging torque suppression technology is one of the key technologies in the design an...

Claims

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Application Information

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IPC IPC(8): H02K15/02
CPCH02K15/026
Inventor 陈红祝喆
Owner SHANDONG UNIV OF SCI & TECH
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