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Bilateral linear motor with primary electric excitation series magnetic circuit

A series of magnetic circuit, linear motor technology, applied in electrical components, electromechanical devices, electric components and other directions, can solve the problems of increase, material waste cost, large proportion of secondary yoke iron core, etc., to improve power density, increase load ability, the effect of reducing friction loss

Active Publication Date: 2018-02-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the iron core of the secondary yoke of the traditional unilateral or bilateral primary electric excitation motor occupies a relatively large proportion, which leads to waste of materials and increased cost

Method used

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  • Bilateral linear motor with primary electric excitation series magnetic circuit
  • Bilateral linear motor with primary electric excitation series magnetic circuit
  • Bilateral linear motor with primary electric excitation series magnetic circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1, the primary electric excitation series magnetic circuit bilateral linear motor of the present invention comprises a bilateral primary 11 and a secondary 10, the primary 11 and the secondary 10 are both magnetically permeable materials with an air gap between them, and the primary 11 is provided with a magnetically permeable tooth 110 , the concentrated armature windings 111 and the concentrated excitation windings 112 are arranged alternately on the magnetically permeable teeth 110 . In the motor of this embodiment, m=3, k=1, n=1, wherein, m is the phase number of the motor, n and k are positive integers, n is the number of motor units, and k is the unilateral primary in each motor unit The number of concentrated armature winding pairs connected in series in any phase of the armature winding. That is, the motor is a three-phase motor with three phases A, B, and C, and includes n=1 motor units, and each motor unit has k=1 pairs of concentrated armature win...

Embodiment 2

[0038] Figure 4 It is also a bilateral linear motor with primary electric excitation series magnetic circuit. In this embodiment, k=1, n=2, m=3, that is, the motor is a three-phase motor, including 2 motor units, each motor unit has k=1 pair of centralized armature winding. The difference between this embodiment and Embodiment 1 is that n=2, that is, it consists of two motors of Embodiment 1. Therefore, this motor also has the characteristics of the motor of embodiment 1. n=2 motor units can be controlled individually, or connected in series as a motor control.

Embodiment 3

[0040] Figure 5 Also for a bilateral primary electric excitation secondary yokeless linear motor. In this embodiment, k=2, n=1, m=3, that is, the motor is a three-phase motor, including 1 motor unit, and there are k=2 pairs of concentrated armature windings in each unilateral primary, so a single The number of side primary 11 magnetic conducting teeth 110 is Ns=4*m*k*n=24, and the number of magnetic conducting teeth 110 is successively provided with concentrated armature winding 111 is 2*m*k*n=12, from Starting from the first magnetically conductive teeth 110, every two magnetically conductive teeth 110 are covered with a concentrated armature winding 111, and adjacent concentrated armature windings 111 share one slot; the remaining 2*m*k*n=12 slots Set m*k*n=6 concentrated excitation windings 112 in sequence and each concentrated excitation winding 112 is covered with two magnetically conductive teeth, that is, starting from the second magnetically conductive tooth 110, eac...

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PUM

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Abstract

The invention discloses a bilateral linear motor with a primary electric excitation series magnetic circuit, comprising two unilateral primary and secondary, the primary is provided with a magnetic conduction tooth; starting from the first magnetic conduction tooth, every two magnetic conduction teeth are covered with a For concentrated armature windings, adjacent concentrated armature windings share one slot; starting from the second magnetic conducting tooth, each concentrated excitation winding is surrounded by two magnetic conducting teeth, and adjacent concentrated exciting windings are spaced apart or share a slot. The two unilateral primary structures are the same, their relative positions to the secondary are the same, and the directions of the magnetic fields generated by their corresponding excitation windings are the same. The secondary is composed of a magnetic block or a magnetic block and a connecting bridge. The ratio of the secondary to the primary pole pitch is equal to or approximately equal to 4*m*k / (2*m*k±1), where m is the phase of the motor number, n is the number of motor units, k is the logarithm of concentrated armature windings connected in series with one-phase armature windings in any unilateral primary in each motor unit; this motor is brushless, and the opposite potential is symmetrical and approximately sinusoidal. The size, so as to achieve variable speed constant voltage output and constant speed variable voltage output characteristics. The sub-substructure is simple and has no yoke, which not only improves the output thrust density of the motor, but also reduces the system cost.

Description

technical field [0001] The invention relates to a primary electric excitation series magnetic circuit bilateral linear motor, which belongs to the technical field of motor manufacturing. Background technique [0002] With the development of industry, linear motors are widely used. The requirements for driving motors and systems in various fields are getting higher and higher, and the driving method of converting rotary motion into linear motion by using rotary motors and mechanical conversion devices is increasingly unable to meet the corresponding requirements, and the use of linear motor drives can reduce costs. System volume, reduce noise. In occasions such as rail transit, elevators in high-rise buildings, and factory transportation, the use of rotating motors will cause problems such as complex drive, high cost, and slow dynamic response. Therefore, the technical means of replacing the rotary motor with a linear motor can overcome the above-mentioned shortcomings in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K41/02
Inventor 曹瑞武金毅张雁泽黄文新
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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