Thrust force enhancement and ripple reduction of a sandwiched linear flux switching permanent magnet machine with segment stator for urban rail transit

2018 ◽  
Vol 13 (6) ◽  
pp. 924-931 ◽  
Author(s):  
Wenjuan Hao ◽  
Yu Wang
Keyword(s):  
Permanent Magnet ◽  
Thrust Force ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Force Enhancement ◽  
Permanent Magnet Machine ◽  
Urban Rail ◽  
Ripple Reduction

Design and Analysis of a New Linear Fault-Tolerant Flux-Reversal Permanent-Magnet Machine

2013 ◽  
Vol 416-417 ◽  
pp. 3-8 ◽  
Author(s):  
Liang Xu ◽  
Wen Xiang Zhao ◽  
Jing Hua Ji ◽  
Guo Hai Liu
Keyword(s):  
Permanent Magnet ◽  
Electromotive Force ◽  
Magnetic Circuit ◽  
Fault Tolerant ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Permanent Magnet Machine ◽  
Flux Reversal ◽  
Detent Force ◽  
Urban Rail

This paper proposes a new linear fault-tolerant flux-reversal permanent-magnet machine for urban rail transit. The key of the proposed machine is that the magnetizer divides the short mover into two modules. As a result, the two modules of the short mover have the complementary magnetic circuit, and the detent force of the proposed machine is reduced. Also, it possesses more symmetrical and sinusoidal back electromotive force (back-EMF). In addition, the mutual inductances of the propose machine are much lower than the self-inductances, hence offering fault-tolerant capability. The finite-element results confirm the validity of the proposed machine.

A New Linear Double Salient Permanent Magnet Motor with Complementary Winding

2013 ◽  
Vol 416-417 ◽  
pp. 115-120
Author(s):  
Ming Cheng ◽  
Rui Wu Cao ◽  
Wei Hua ◽  
Xin Wang
Keyword(s):  
Permanent Magnet ◽  
Thrust Force ◽  
Urban Rail Transit ◽  
Static Characteristics ◽  
Permanent Magnet Motor ◽  
Linear Motors ◽  
Urban Rail ◽  
Fair Comparison ◽  
Force Ripple ◽  
Novel Structures

In this paper, two novel structures of linear double salient permanent magnet (LDSPM) motor having magnets and armature windings in primary are proposed and compared. Firstly, the design principles of both motors are presented. Then, for a fair comparison, two motors are designed based on the same primary dimensions including the slot area, teeth number, pole pitch, permanent magnet volumes and coils number per phase, while the stator pole pitch and the primary structure are different. Finally, the configurations and static characteristics of both motors are critically compared based on finite element (FE) analysis. The results indicate that the proposed topology can avoid the asymmetry of back-EMF waveforms and reduce cogging force and thrust force ripple. Also, the proposed primary permanent magnet linear motors are suitable for the longer stator application such as urban rail transit (URT).

Influence of Built Environment on Urban Rail Transit Connection Mode

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Zhao Gao ◽  
Min Yang ◽  
Guoqiang Li ◽  
Jinghua Tai
Keyword(s):  
Built Environment ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Urban Rail
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