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T-type flux-switching permanent magnet linear motor and modules of T-type flux-switching permanent magnet linear motor

A technology of permanent magnet linear motor and magnetic flux switching, which is applied in the field of motor manufacturing and electrical engineering, and can solve the unbalanced parameters such as the complementarity of each phase winding and structure, the opposite potential and inductance, and the asymmetry of the positive and negative half cycles of the magnetic flux. And other problems, to achieve the effect of improving fault tolerance, stable motor operation, and improved sine degree

Inactive Publication Date: 2014-11-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the field of urban rail transit, the disadvantages of the traditional rotary motor drive system, such as poor stability and low efficiency, have always restricted its development, and the use of a linear motor drive system instead of a rotary motor drive can well overcome the shortcomings of the rotary motor drive system. The adverse effects brought by the field of urban rail transit, while improving the efficiency of the entire system
However, the positive and negative half cycles of the magnetic flux of the end phase winding of the traditional flux switching linear motor are asymmetrical, which causes the imbalance of parameters such as the opposite electric potential and inductance
The traditional modular flux switching linear motor does not take into account the complementarity of each phase winding and structure, and there are disadvantages such as the asymmetry of the positive and negative half cycles of the flux linkage and back EMF of each phase, and large positioning force.

Method used

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  • T-type flux-switching permanent magnet linear motor and modules of T-type flux-switching permanent magnet linear motor
  • T-type flux-switching permanent magnet linear motor and modules of T-type flux-switching permanent magnet linear motor
  • T-type flux-switching permanent magnet linear motor and modules of T-type flux-switching permanent magnet linear motor

Examples

Experimental program
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Effect test

Embodiment 1

[0036] see figure 1 , The modular complementary flux switching permanent magnet linear motor structure provided by the present invention includes a motor primary 5 and a motor secondary 6 with an air gap between them. Primary 5 and secondary 6 both adopt a salient pole structure. And both the permanent magnet 3 and the winding 2 are on the primary 5, and the secondary 6 is only made of magnetically permeable material, without winding and permanent magnet.

[0037] At this time, when the number of phases m=3, the relative displacement between two adjacent different phases on the same module is 1 / 6τ s , k=4, s=2, λ 1 =9 / 2τ s ,λ 2 =13 / 6τ s , τ m =τ s .

[0038] The motor primary 5 includes T-shaped units 7, a total of N*m, each i T-shaped units 7 form a module, N is the number of coils in each phase winding, and i is a positive integer. And the non-magnetic conductive block 4 is used to fill the space between two adjacent modules 1 . Each T-shaped unit 7 consists of two...

Embodiment 2

[0045] Such as figure 2 As shown, when m=3, the relative displacement between two adjacent out-of-phase on the same module is 1 / 3τ s , k=4, s=2, λ 1 =4τ s ,λ 2 =11 / 6τ s , τ m =1 / 2τ s . The difference between the modular complementary magnetic flux switching permanent magnet linear motor in this embodiment and that in Embodiment 1 is that the motor is composed of four T-shaped units to form a module, and there are 3 modules in total. The width of the non-magnetic block 4 between two adjacent modules 1 becomes half of the original, that is, τ m =1 / 2τ s , τ m is the width of the non-magnetic block, τ s is the secondary pole distance, and at this time, the relative displacement between two adjacent out-of-phase on a module is (1 / m)*τ s. The winding method is still in accordance with the "ABCABC..." three-phase sequential winding, but the winding direction of the second module is completely opposite to that of the other two modules, and the following two conditions mus...

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Abstract

The invention discloses a module-complementary-type flux-switching permanent magnet linear motor which comprises a primary part and a secondary part. The primary part and the secondary part are of convex electrode structures. An air gap is reserved between the primary part and the secondary part. The primary part comprises primary iron cores, permanent magnets, non-magnetic blocks and armature windings. Magnetic teeth are formed by the primary iron cores. A T-type unit is formed by each permanent magnet and the magnetic teeth on the two sides of the permanent magnet. The primary part comprises N*m T-type units, wherein the N is the number of coils in the windings of each phase, and the m is the number of the phases of the motor. A module is formed by i T-type units. The module-complementary-type flux-switching permanent magnet linear motor has the symmetrical complementarity, the manufacturing difficulty is lowered, waveforms of flux linkages and waveforms of counter electromotive force of the motor are symmetrical and are in sine shapes, fluctuation of push force is remarkably reduced, and the module-complementary-type flux-switching permanent magnet linear motor is particularly suitable for linear driving occasions such as urban rail traffic systems, factory transport transmission devices and elevators.

Description

technical field [0001] The invention relates to a novel module complementary magnetic flux switching permanent magnet linear motor and a motor module composed thereof, specifically relating to the technical fields of electric engineering and motor manufacturing. Background technique [0002] With the continuous development of industrial technology, linear drive systems have been widely used. Compared with the traditional rotary motor drive system, the linear motor drive can save the conversion device that converts rotary motion into linear motion, greatly reduces mechanical friction, not only reduces cost, but also reduces noise and maintenance costs , energy saving and environmental protection. Especially in the field of urban rail transit, the disadvantages of the traditional rotary motor drive system, such as poor stability and low efficiency, have always restricted its development, and the use of a linear motor drive system instead of a rotary motor drive can well overc...

Claims

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Application Information

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IPC IPC(8): H02K41/03
Inventor 杜怿沈晨普诸德宏刘贤兴肖凤
Owner JIANGSU UNIV
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