scholarly journals Thrust Force Ripple Reduction of Two C-Core Linear Flux-Switching Permanent Magnet Machines of High Thrust Force Capability

Energies ◽  
2017 ◽  
Vol 10 (10) ◽  
pp. 1608 ◽  
Author(s):  
Wenjuan Hao ◽  
Yu Wang
Keyword(s):  
Permanent Magnet ◽  
Thrust Force ◽  
Permanent Magnet Machines ◽  
Ripple Reduction ◽  
Force Ripple ◽  
High Thrust

scholarly journals Enhancing Capabilities of Double Sided Linear Flux Switching Permanent Magnet Machines

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2781 ◽  
Author(s):  
Noman Ullah ◽  
Abdul Basit ◽  
Faisal Khan ◽  
Wasiq Ullah ◽  
Mohsin Shahzad ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Efficiency ◽  
Thrust Force ◽  
Low Cost ◽  
Harmonic Distortion ◽  
Geometric Optimization ◽  
Force Density ◽  
Permanent Magnet Machines ◽  
Force Ripple ◽  
Long Stroke

Double sided linear flux switching permanent magnet machines (DSLFSPMMs) exhibit high thrust force density, high efficiency, low cost and robust double salient secondary (stator) structures. The aforementioned unique features make DSLFSPMM suitable for long stroke applications. However, distorted flux linkage waveforms and high detent forces can exaggerate thrust force ripples and reduce their applicability in many areas. In order to enhance thrust force performance, reduce thrust force ripple ratio and total harmonic distortion (THD) of no-load flux linkages, two structure-based advancements are introduced in this work, i.e., asynchronous mover slot and stator tooth displacement technique (AMSSTDT) and the addition of an active permanent magnet end slot (APMES). Furthermore, single variable geometric optimization (SVGO) is carried out by the finite element method (FEM).

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).

Novel linear switched-flux PM machine with 9/10 primary/secondary pole number combination

2015 ◽  
Vol 34 (6) ◽  
pp. 1656-1672 ◽  
Author(s):  
Qinfen Lu ◽  
Yanxin Li ◽  
Yunyue Ye ◽  
J.T. Chen ◽  
Z.Q. Zhu
Keyword(s):  
Permanent Magnet ◽  
Thrust Force ◽  
Load Condition ◽  
Design Parameters ◽  
Force Density ◽  
Direct Drive ◽  
Low Thrust ◽  
Element Analysis ◽  
Content Type ◽  
Force Ripple

Purpose – Due to linear structure, linear switched flux permanent magnet machines (LSFPMMs) also may have odd pole primary, such as 9, 15, 21, etc., without unbalanced magnetic force in equivalent rotary machines. The paper aims to discuss these issues. Design/methodology/approach – In order to increase the thrust force density, the influence of some major design parameters, including split ratio, PM thickness, primary slot width and secondary pole width, are investigated by finite element analysis. For reducing the thrust force ripple under on-load condition, the end auxiliary teeth are adopted and their positions are also optimized. Findings – This novel 9/10 primary/secondary poles LSFPMM has high average thrust force and low thrust force ripple by optimization. The results demonstrate that the odd pole primary may be a good candidate for long-stroke linear direct drive application. Originality/value – A novel 9/10 primary/secondary poles linear switched flux permanent magnet machine is developed in this paper. The similar conclusions could be obtained for other LSFPMMs with odd pole primary.

scholarly journals Thrust force ripple reduction of H-LVPMM based on dynamic harmonic current compensation

2020 ◽  
Vol 14 (2) ◽  
pp. 226-233
Author(s):  
Zhi Chen ◽  
Wubin Kong ◽  
You Zhou ◽  
Ronghai Qu ◽  
Vincent Fedida
Keyword(s):  
Thrust Force ◽  
Harmonic Current ◽  
Current Compensation ◽  
Ripple Reduction ◽  
Force Ripple ◽  
Harmonic Current Compensation

Comparison of Linear Switched Flux Permanent Magnet Machines

2013 ◽  
Vol 416-417 ◽  
pp. 121-126
Author(s):  
Y.J. Zhou ◽  
Z.Q. Zhu ◽  
Robert Nilssen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Magnet ◽  
Thrust Force ◽  
Permanent Magnet Machines ◽  
Two Dimensional ◽  
Element Analysis

This paper proposes a linear sandwiched switched flux permanent magnet (LSSFPM) machine and two double-sided linear switched flux permanent magnet (LSFPM) machines havingtoroidal windings. Bothmachines are optimized and then compared with the conventional 6-slot/5-pole LSFPM machine. It is found that the proposed machines exhibithigher magnet usage efficiencies than the conventional LSFPM machine, and the double-sided machines show shorter end-windings, which are benefited from toroidal windings. The performance, including back-EMF, cogging force and average thrust force, are analyzedby two-dimensional (2-D) finite element analysis (FEA).

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