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Permanent magnet linear synchronous motor with low electromagnetic force fluctuation

A permanent magnet linear synchronization and low electromagnetic technology, applied in the direction of electric components, electrical components, electromechanical devices, etc., can solve the problems of poor structural strength, low reliability, and inability to meet the requirements of high-precision servo systems, and achieve the suppression of electromagnetic force Fluctuations, effects of good electromagnetic force fluctuations

Active Publication Date: 2020-05-19
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method leads to disadvantages such as complex primary structure, poor structural strength, and low reliability.
At the same time, although the traditional auxiliary pole has a certain effect in suppressing electromagnetic force fluctuations, it cannot meet the requirements of high-precision servo systems

Method used

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  • Permanent magnet linear synchronous motor with low electromagnetic force fluctuation
  • Permanent magnet linear synchronous motor with low electromagnetic force fluctuation
  • Permanent magnet linear synchronous motor with low electromagnetic force fluctuation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as Figure 1 to Figure 4 As shown, a permanent magnet linear synchronous motor with low electromagnetic force fluctuation provided by Embodiment 1 of the present invention includes a primary and a secondary, the primary includes a primary core 1, and an armature slot 2 is opened on the primary core 1, adjacent to Between the armature slots 2 are armature teeth 3, and the armature slot 2 is provided with an armature winding 4; the secondary includes a secondary yoke 5 and a plurality of permanent magnets arranged on the upper surface of the secondary yoke 5 6 arrays of permanent magnets arranged in sequence.

[0049] The primary core 1 further includes a first auxiliary pole 7 disposed at both ends, and a corresponding second auxiliary pole 8 is disposed outside the first auxiliary pole 7 . There is an air gap between the first auxiliary pole 7 and the second auxiliary pole 8 .

[0050] The outer surface of the first auxiliary pole 7 is a first stepped surface 9, ...

Embodiment 2

[0079] Such as Figure 5 to Figure 7 As shown, Embodiment 2 of the present invention provides a permanent magnet linear synchronous motor with low electromagnetic force fluctuation, including a primary and a secondary, the primary includes a primary core 1, and an armature slot 2 is opened on the primary core 1. Between the armature slots 2 are armature teeth 3, and the armature slot 2 is provided with an armature winding 4; the secondary includes a secondary yoke 5 and a plurality of permanent magnets 6 arranged on the upper surface of the secondary yoke 5 The array of permanent magnets is arranged sequentially.

[0080] The primary core 1 further includes a first auxiliary pole 7 disposed at both ends, and a corresponding second auxiliary pole 8 is disposed outside the first auxiliary pole 7 . There is an air gap between the first auxiliary pole 7 and the second auxiliary pole 8 .

[0081] The outer surface of the first auxiliary pole 7 is a first stepped surface 9, and th...

Embodiment 3

[0096] like Figure 8 As shown, Embodiment 3 of the present invention provides a permanent magnet linear synchronous motor with low electromagnetic force fluctuation, including a primary and a secondary, the primary includes a primary iron core 1, and an armature slot 2 is opened on the primary iron core 1. Between the armature slots 2 are armature teeth 3, and the armature slot 2 is provided with an armature winding 4; the secondary includes two secondary yokes 5, and the sides of the two secondary yokes 5 are attached to each other, and the secondary The other side of the yoke is provided with a permanent magnet array composed of a plurality of permanent magnets 6 arranged in sequence. The primary is provided above the upper permanent magnet array and below the lower permanent magnet array.

[0097] The primary iron core 1 on the upper and lower sides further includes a first auxiliary pole 7 disposed at both ends, and a corresponding second auxiliary pole 8 is disposed on ...

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PUM

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Abstract

The invention provides a permanent magnet linear synchronous motor with low electromagnetic force fluctuation, and belongs to the technical field of linear motors. A primary iron core further comprises first auxiliary poles arranged at two ends respectively, and corresponding second auxiliary poles are arranged on the outer sides of the first auxiliary poles; the outer side surface of each first auxiliary pole is a first step surface formed by sequentially arranging a plurality of first end surfaces; the second auxiliary pole is of a stepped structure formed by sequentially connecting a plurality of auxiliary blocks corresponding to the first end surfaces; and the face, opposite to the first end surface, of each auxiliary block is a second end surface, the face, opposite to the second endsurface, of each auxiliary block is a third end surface, all the second end surfaces form a second stepped face, and all the third end surfaces form a third stepped face. By arranging the stepped double-auxiliary-pole structure, the machining difficulty is reduced, the primary mechanical strength of the linear motor is improved, and meanwhile, on the premise that an existing linear motor manufacturing process is not changed, a good effect of restraining electromagnetic force fluctuation (thrust fluctuation and normal force fluctuation) is achieved.

Description

technical field [0001] The invention relates to the technical field of linear motors, in particular to a permanent magnet linear synchronous motor with low electromagnetic force fluctuations that can suppress electromagnetic force fluctuations. Background technique [0002] Permanent magnet linear synchronous motor has significant advantages such as high thrust density and high efficiency. With the development of permanent magnet materials and power electronic device control technology in recent years, the performance of traditional permanent magnet linear synchronous motors is getting better and better, and they are widely used in high-precision CNC machine tools, photolithography machines, 3C product manufacturing complete sets of equipment, High-speed logistics and cordless elevators, etc. However, since the permanent magnet linear synchronous motor is different from the rotating motor, the two ends of the primary and secondary are disconnected, and the lengths are not e...

Claims

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Application Information

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IPC IPC(8): H02K41/03
CPCH02K41/031H02K2213/03
Inventor 张超张立伟申璐
Owner BEIJING JIAOTONG UNIV