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Modular secondary yoke-free bilateral primary permanent-magnet switched reluctance linear motor

A technology of switched reluctance and linear motors, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve problems such as thrust fluctuations and low power density, and achieve the effects of reducing thrust fluctuations, high output thrust, and high reliability

Pending Publication Date: 2019-07-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional switched reluctance motors have disadvantages such as large thrust fluctuations and low power density.

Method used

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  • Modular secondary yoke-free bilateral primary permanent-magnet switched reluctance linear motor
  • Modular secondary yoke-free bilateral primary permanent-magnet switched reluctance linear motor
  • Modular secondary yoke-free bilateral primary permanent-magnet switched reluctance linear motor

Examples

Experimental program
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Effect test

Embodiment 1

[0057] A modular secondary yokeless bilateral primary permanent magnet switched reluctance linear motor of the present invention see figure 1 , including bilateral primary 11 and secondary 10, and there is an air gap between the primary 11 and secondary 10. The primary 11 is composed of primary modules 110, each of which includes a U-shaped magnetically permeable material 111, an armature winding 112, and a permanent magnet 113 placed at the notch of the U-shaped magnetically permeable material 111, and the secondary 10 is composed of Several secondary mover blocks 100 without yoke are formed. The armature windings 112 in the same primary module 110 have opposite winding directions and belong to the same phase. The permanent magnets 113 are magnetized horizontally, the magnetization directions of adjacent permanent magnets 113 are the same, the magnetization directions of the corresponding permanent magnets 113 above and below the primary 11 are opposite, and the magnetic flu...

Embodiment 2

[0066] Another pole pitch ratio motor of a modular secondary yokeless bilateral primary permanent magnet switched reluctance linear motor of the present invention, see figure 2 , including bilateral primary 11 and secondary 10, and there is an air gap between the primary 11 and secondary 10. The primary 11 is composed of primary modules 110, each of which includes a U-shaped magnetically permeable material 111, an armature winding 112, and a permanent magnet 113 placed at the notch of the U-shaped magnetically permeable material 111, and the secondary 10 is composed of The secondary mover block 100 is formed without a yoke. The armature windings 112 in the same primary module 110 have opposite winding directions and belong to the same phase; the permanent magnets 113 are magnetized horizontally, and the magnetization directions of adjacent permanent magnets 113 are the same, and the magnetization directions of the permanent magnets 113 corresponding to the upper and lower sid...

Embodiment 3

[0075] A modular secondary yokeless bilateral primary permanent magnet switched reluctance linear motor of the present invention, see image 3 , is a complementary structure motor. It includes bilateral primary 11 and secondary 10, and there is an air gap between the primary 11 and secondary 10. The primary 11 is composed of primary modules 110, each of which includes a U-shaped magnetically permeable material 111, an armature winding 112, and a permanent magnet 113 placed at the notch of the U-shaped magnetically permeable material 111, and the secondary 10 is composed of The secondary mover block 100 is formed without a yoke. The armature windings 112 in the same primary module 110 have opposite winding directions and belong to the same phase; the permanent magnets 113 are magnetized horizontally, and the magnetization directions of adjacent permanent magnets 113 are the same, and the magnetization directions of the permanent magnets 113 corresponding to the upper and lower...

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Abstract

The invention discloses a secondary yoke-free bilateral primary permanent-magnet switched reluctance linear motor. A primary side of the motor comprises a U-shaped magnetic conductive material, an armature winding and permanent magnets arranged at a notch of the magnetic conductive material; and a secondary side of the motor is only composed of yoke-free rotor blocks. The permanent magnets are magnetized in parallel, the magnetizing directions of the primary permanent magnets on the two sides are opposite, and the permanent magnets generate a magnetic circuit in a no-load state, the magnetic circuit passes through the U-shaped magnetic conductive material to cause a short-circuited state, thereby reducing the positioning force; a magnetic flux passes through a yoke-free secondary side in the loading process to a series magnetic circuit during loading. Removal of the secondary yoke portion can reduce secondary mass and improve thrust density. A secondary iron core can be filled and fastened by an epoxy material with light weight. The motor provided by the invention has the advantages of a small positioning force, a simple secondary structure, high thrust density and the like, is suitable for an electromagnetic ejection system, and can improve the power density and the loading capacity of the ejection system.

Description

technical field [0001] The invention relates to a modularized secondary yokeless bilateral primary permanent magnet switched reluctance linear motor, which belongs to the technical field of motor manufacturing. Background technique [0002] With the development of industry, linear motors are more and more widely used in various occasions. In the field of electromagnetic ejection, steam catapults are currently widely used ejection equipment on active aircraft carriers. However, steam catapult subsystems are numerous and complex, with large volume and ship area, heavy weight, low work efficiency, and high system use and maintenance costs. As an open-loop system, ejection controllability is poor. Therefore, with the progress of modern military, there is an urgent need for a new type of ejection device to replace the steam ejector, and a linear motor for electromagnetic ejection has been proposed and developed. [0003] At present, the research on linear motors used in aircraf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03
CPCH02K41/031
Inventor 曹瑞武沈丹妮陆鸣航
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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