scholarly journals Electromagnetic launch systems for civil aircraft assisted take-off

2015 ◽  
Vol 64 (4) ◽  
pp. 535-546 ◽  
Author(s):  
Luca Bertola ◽  
Tom Cox ◽  
Patrick Wheeler ◽  
Seamus Garvey ◽  
Herve Morvan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Linear Motor ◽  
Element Analysis ◽  
Engine Thrust ◽  
Electromagnetic Launch ◽  
Civil Aircraft ◽  
Electromagnetic Launcher ◽  
Initial Acceleration ◽  
Launch Systems

Abstract This paper considers the feasibility of different technologies for an electromagnetic launcher to assist civil aircraft take-off. This method is investigated to reduce the power required from the engines during initial acceleration. Assisted launch has the potential of reducing the required runway length, reducing noise near airports and improving overall aircraft efficiency through reducing engine thrust requirements. The research compares two possible linear motor topologies which may be efficaciously used for this application. The comparison is made on results from both analytical and finite element analysis (FEA).

Design of Horizontally Vibrating Linear Motor for Thin Smart Phone

2014 ◽  
Vol 548-549 ◽  
pp. 824-828
Author(s):  
Ki Bum Lee ◽  
Jae Hee Kim ◽  
Jin Ho Kim
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Smart Phone ◽  
Linear Motor ◽  
Electromagnetic Analysis ◽  
Analysis Software ◽  
Element Analysis ◽  
Large Display ◽  
Vibration Modeling ◽  
Ansys Workbench

Smart phone has various function and large display for convenience. However, there is some disadvantage that the smart phone is less portable than before. The thickness of the smart phone should be reduced in order to improve the portability of a smart phone. The vibrating motor is one of the thicker components in a smart phone. Therefore, we develop a horizontally vibrating linear motor that can be used to reduce the thickness of a smart phone. In order to develop a horizontally vibrating linear motor (HVLM), Mathematical vibration modeling is used, and a finite element analysis using the commercial electromagnetic analysis software MAXWELL. Also, the guide spring is designed using commercial structural analysis software ANSYS workbench. Finally, a prototype is manufactured for use in experiments. Its thickness is reduced by 30 % compared to a vertical linear vibrating motor. In addition, the motor can vibrate with an acceleration of approximately 2.10 Gravity (G).

Comparative study of thrust of U-shaped ironless permanent magnet synchronous linear motor based on analytical method and finite element analysis

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1091-1101
Author(s):  
Zhihui Yang ◽  
Ren Liu ◽  
Bin Xia
Keyword(s):  
Magnetic Field ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Magnet ◽  
Edge Effect ◽  
Three Dimensional ◽  
Linear Motor ◽  
Air Gap ◽  
Element Analysis ◽  
Air Gap Magnetic Field

Due to the large transverse edge effect for U-shaped ironless permanent magnet synchronous linear motor affect the distribution of air gap magnetic field is large, it will reduce the no-load back electromotive force and thrust. This paper proposes a novel method to evaluate the effect of transverse edge effect based on Kriging surrogate model. By comparing the results of the two-dimensional and three-dimensional finite element analysis of the air gap magnetic field of the motor, it can be seen transverse length of the motor, air gap height and thickness of the permanent magnet are the main influencing factors.

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