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Two-stage slot less cylindrical permanent magnet linear motor

A permanent magnet linear motor, two-stage technology, applied in electrical components, electromechanical devices, electric components, etc., can solve the problems of large space occupied by the magnetic isolation bridge, increase of the effective volume of the motor, discrete motor structure, etc. Average thrust, increased reliability, increased thrust density effects

Active Publication Date: 2018-11-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are many segments, on the one hand, the structure of the motor is relatively discrete, and on the other hand, the space occupied by the magnetic isolation bridge is large, which increases the effective volume of the motor, which is not conducive to the improvement of thrust density.

Method used

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  • Two-stage slot less cylindrical permanent magnet linear motor
  • Two-stage slot less cylindrical permanent magnet linear motor
  • Two-stage slot less cylindrical permanent magnet linear motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] Such as figure 1 with figure 2 As shown, the present invention provides a two-stage slotless cylindrical permanent magnet linear motor, which includes a two-stage primary assembly and a secondary assembly. The primary assembly is composed of a first section of primary iron core 1-1, a second section of primary iron core 1-2, an armature winding 3-1 and an armature winding 3-2. The primary assembly adopts a slotless structure, and the armature winding 3-1 and the armature winding 3-2 are respectively fixed on the inner circles of the cylindrical primary iron core 1-1 and the cylindrical primary iron core 1-2. The secondary assembly consists of a secondary iron core 4 and a permanent magnet 5 . There is an air gap 6 between the primary and secondary components. A magnetic isolation bridge 2 is arranged between the two primary structures. The sum of the lengths of the first primary iron core and the magnetic isolation bridge is (K+α)*τ (K is a positive integer, τ is t...

Embodiment approach 2

[0027] The difference between this embodiment and Embodiment 1 is: image 3 As shown, the sum of the lengths of the primary iron core and the magnetic isolation bridge of the first section is (K+α)*τ (K is a positive integer, 0<α<1 / 3, τ is the pole pitch of the motor), and the armature of the second section The start and end of the winding are coils of width W1=(1 / 3-α)τ and W2=α*τ, respectively. The phase of the initial-end coil 3-2-1 on the second primary stage is the same as that of the initial-end coil 3-1-1 on the first primary stage.

Embodiment approach 3

[0029] The difference between this embodiment and Embodiment 1 is: Figure 4 As shown, additional teeth 8 at the ends are added at both ends of the primary assembly of the first stage and the primary assembly of the second stage.

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Abstract

The invention discloses a two-stage slot less cylindrical permanent magnet linear motor. A first stage primary component comprises a first stage primary iron core and a first stage armature winding, asecond stage primary component comprises a second stage primary iron core and a second stage armature winding, the first stage armature winding and the second stage primary components are adopt slotless structure; the first stage armature winding and the second stage armature winding are respectively fixed in a first stage primary iron core and a second stage primary iron core; The secondary assembly is consist of a secondary core and a permanent magnet; Air gaps are formed between the first stage primary component, a magnetic isolation bridge is arranged between the two stage of primary components, sum of length of the first stage primary iron core and the magnetic isolation bridge is (K+[alpha])*[tau], K is a positive integer, [tau] is pole pitch of the motor, [alpha] is width coefficient of the magnetic isolation bridge, and 0<[alpha]<=0.5; the beginning and end of the second stage armature winding adopt different winding coil according to different [alpha] values, and the windingphase needs to be adjusted according to the value of [alpha]. The motor structure is benefits reducing the locating force and thrust ripple caused by the edge effect.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a two-stage modular slotless cylindrical permanent magnet linear motor. Background technique [0002] The direct transmission technology based on linear motors eliminates the need for intermediate complex transmission mechanisms. It has been applied in linear motion occasions such as machine tools and elevators, and its application fields are gradually expanding to various fields of production and life. The permanent magnet synchronous linear motor has the advantages of simple and reliable structure, high thrust and thrust density, so it has broad application prospects in various high-precision linear motion control occasions. Different from the rotating motor, the iron core of the linear motor has an end, and the end effect causes the harmonic component of the magnetic field to increase, causing the positioning force and thrust fluctuation to increase. Therefore, reducing the pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03H02K3/04
CPCH02K3/04H02K41/031H02K2213/03
Inventor 黄旭珍嵇天鹏梁进周波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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