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Tooth-socket bilateral primary permanent magnet synchronous linear motor

A technology of synchronous linear motors and permanent magnets, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of low pitch factor of phase windings, influence of motor efficiency, and excessive length of winding ends, so as to improve output power and Efficiency, improve power factor, improve the effect of sinusoidal degree

Pending Publication Date: 2018-07-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the primary permanent magnet linear motors use centralized windings, and there are cases where the pitch factor of the phase windings is relatively low, which limits the power factor of the primary permanent magnet linear motors. It has a certain impact; the primary permanent magnet linear motor with distributed winding has a series of problems caused by the excessive length of the winding end, such as the influence of motor efficiency, complicated winding settings, and certain difficulties for primary maintenance. Wait

Method used

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  • Tooth-socket bilateral primary permanent magnet synchronous linear motor
  • Tooth-socket bilateral primary permanent magnet synchronous linear motor
  • Tooth-socket bilateral primary permanent magnet synchronous linear motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] see figure 1 , the cogging type bilateral primary permanent magnet synchronous linear motor of the present invention adopts the first type of winding,

[0062]

[0063] In this embodiment, m=3, t=0, k=1, n=4, and the sign is positive, so the pole distance ratio τ p / τ s Set at 5 / 6, which is 10 / 12. Wherein, m is the phase number of the motor, k is the logarithm of the same-phase armature winding 113 in each motor unit, and n is the number of motor units.

[0064] The cogging type bilateral primary permanent magnet synchronous linear motor of the present invention comprises two unilateral secondary 10, primary 11 and armature winding 113, and unilateral secondary 10 and primary 11 are all salient pole structures, and above-mentioned secondary 10 and primary 11 There is an air gap between them. In this embodiment, m=3, that is, the motor in this embodiment is a three-phase motor consisting of three phases A, B, and C. Primary 11 comprises k*m*n=12 basic units 110 ....

Embodiment 2

[0070] image 3 It is also a cogging type bilateral primary permanent magnet synchronous linear motor. The difference between this embodiment and Embodiment 2 is that this embodiment adopts the second type of winding, and the pole pitch ratio satisfies

[0071]

[0072] In this embodiment, m=3, k=4, t=0, n=1, the sign is negative, and the pole distance ratio τ p / τ s =11 / 12.

[0073] In this embodiment, the armature windings 113 in the same primary slot 11 have the same winding direction, and the armature windings 113 in k / 2=2 consecutive primary slots are in-phase windings, wherein the armature windings between adjacent slots The winding direction of 113 is opposite; and the winding direction of adjacent phase windings is opposite; m*k=12 continuous basic units 110 constitute a motor unit;

[0074] The advantages of this example are similar to those of Example 1: the bilateral normal suction forces cancel each other out, reducing the friction loss of the system; it is ...

Embodiment 3

[0076] image 3 It is also a cogging type bilateral primary permanent magnet synchronous linear motor. The difference between this embodiment and Embodiment 1 is that this embodiment adopts the third type of winding, and the pole pitch ratio satisfies

[0077]

[0078] In this embodiment, m=3, k=4, t=0, n=1, the positive and negative signs are positive, and the pole distance ratio τ p / τ s =14 / 24, namely τ p / τ s =7 / 12.

[0079] In this embodiment, the armature windings 113 in the same primary slot 11 have the same winding direction, and the armature windings 113 in k / 2=2 consecutive primary slots are in-phase windings, wherein the armature windings between adjacent slots The winding direction of 113 is the same, m*k=12 continuous basic units 110 constitute a motor unit;

[0080] In this example, on the basis of balanced normal force, simple structure and easy maintenance, the pitch factor of the coil is improved, while the length of the coil end does not change, and ...

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Abstract

The present invention discloses a tooth-socket bilateral primary permanent magnet synchronous linear motor. The motor comprises a primary and two unilateral secondaries, and air gaps are formed between the primary and the two unilateral secondaries. The primary comprises m*k*n basic units, m is a phase number, k is a positive integer and n is the number of motor units. Each basic unit comprises two semi-H-shaped magnetoconductive materials and one permanent magnet arranged between the semi-H-shaped magnetoconductive materials, magnetizing directions of the permanent magnets of adjacent basic units are opposite, and windings revolve around the yoke portions of the basic units. Each secondary comprises magnetoconductive materials with a tooth-socket structure and located at two sides of theprimary. Compared to the prior art, the winding do not pass through the permanent magnets, and the end portions of the windings are shorter, the power density is high to facilitate heat radiation of the permanent magnets, the efficiency is high, and therefore the tooth-socket bilateral primary permanent magnet synchronous linear motor is suitable for occasions such as track drive and the like.

Description

technical field [0001] The invention relates to a bilateral magnetic flux switching permanent magnet motor, which belongs to the technical field of motor manufacturing. Background technique [0002] With the development of industry, bilateral linear motors are widely used. At present, the requirements for drive motors and systems in various fields are getting higher and higher. The performance of traditional rotary motors and mechanical conversion devices is not ideal or difficult to achieve in some occasions. However, the use of linear motor drive systems can reduce drive complexity and reduce system costs. cost, quicker dynamic response, etc. However, there is a normal force between the primary and secondary of the unilateral linear motor, which brings a series of problems to the drive system. Using a bilateral structure can achieve effects such as balancing the normal force and further increasing the output power. Bilateral linear motors are widely used in fields such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03H02K3/28
CPCH02K3/28H02K41/031H02K2213/03
Inventor 曹瑞武陆鸣航苏恩超
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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