Research of Air-Gap Magnetic Field Distribution of Segment-Powered Linear Induction Motor

2013 ◽  
Vol 416-417 ◽  
pp. 408-417
Author(s):  
Jin Rao ◽  
Jin Xu ◽  
De Zhi Liu ◽  
Xi Dang Yang ◽  
Wei Ming Ma
Keyword(s):  
Induction Motor ◽  
Field Distribution ◽  
Single Phase ◽  
Air Gap ◽  
Motive Force ◽  
Force Distribution ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Analytic Expressions ◽  
Air Gap Magnetic Field

For segment-powered linear induction motor (LIM), there is major asymmetry among the mutual inductance of stator windings. Based on magnetic motive force theory, this paper derived the magnetic motive force distribution of single-phase winding of the segment-powered linear induction motor, and confirmed the characteristics of magnetic motive force distribution of the segment-powered linear induction motor. Based on the magnetic motive force distribution of single-phase winding, the analytic expressions of air-gap field distribution of the segment-powered linear motor were derived, and the finite element simulation results verified the analytic results.

Influence of the Air-Gap Changes on the Performance of Linear Induction Motor

2008 ◽  
Vol 392-394 ◽  
pp. 551-554 ◽  
Author(s):  
Xi Lin Zhu ◽  
Shi Ju E ◽  
Chun Fu Gao
Keyword(s):  
Magnetic Field ◽  
Induction Motor ◽  
Air Gap ◽  
Optimized Design ◽  
End Effects ◽  
Element Analysis ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Air Gap Magnetic Field ◽  
Primary Current

The transient characteristic of single-sided linear induction motor (LIM) was simulated and computed using the electromagnetic field finite element analysis software Ansoft. The change of the thrust, the primary current and the air-gap’s magnetic field of linear induction motor was analyzed under the different air-gap’s size condition. The analysis result shows that, with the growth of air gap, the motor thrust reduces but the primary current increases, and the distribution of motor air-gap magnetic field is uneven due to the existence of end effects. Finally a comparison is made between the simulation result and the experiment result, which indicates the correctness of simulated model, thus it can provide important basis for the manufacture, optimized design and control of LIM which is used in subways.

scholarly journals Field distribution of a flux-concentration type linear induction motor

2001 ◽  
Vol 37 (4) ◽  
pp. 2841-2843 ◽  
Author(s):  
D. Roy ◽  
A. Fujiyoshi ◽  
S. Yamada ◽  
M. Iwahara
Keyword(s):  
Induction Motor ◽  
Field Distribution ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Flux Concentration

Calculation Spectral Characteristics of Magnetic Field of the Linear Induction Motor at the Braking Modes

2008 ◽  
Vol 144 ◽  
pp. 136-139 ◽  
Author(s):  
Bronius Karaliunas ◽  
Edvardas Matkevicius
Keyword(s):  
Magnetic Field ◽  
Induction Motor ◽  
Single Phase ◽  
Spectral Characteristics ◽  
Fourier Integral ◽  
Periodic Functions ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Electric Braking ◽  
Dynamic Braking

The paper considers some problems of calculating spectral characteristics of magnetic field of the linear induction motor (LIM), operating at the electrical braking modes. In automatic drives with LIM the electric braking modes are usually applied: dynamic, recuperation, single – phase, capacitor type, braking by means of opposite connection, by pulsating current and inverter type (frequency) braking. During the process of braking in the moving part of the LIM and in some cases in an inductor there are initiated complicated interrelated electromagnetic and electromechanical non – stationary processes. The braking processes have been analysed in the motionless right – sided Descartes system of coordinates x, y, z. There have been presented the expressions of volumetric density of braking current which have been regarded the non – periodic functions of coordinate x. Besides that in cases of single – phase and capacitor braking these expressions are also regarded as the non – periodic functions of time. Therefore when compiling the mathematical model there have been applied Laplace and Fourier integral transformations. After having applied Fourier transformation there have been received the expressions of the spectra amplitudes of primary magnetic field at the dynamic braking under the condition that the number of excited zones in the inductor is even, uneven and fractional. The continuous spectra of amplitudes have been calculated by the software Mathcad 2001 Profesional.

High Air Gap Linear Induction Motor Fast Simulation

2021 ◽  
Author(s):  
Claudio Bianchini ◽  
Ambra Torreggiani ◽  
Matteo Davoli ◽  
Danilo David ◽  
Andrea Sala ◽  
...  
Keyword(s):  
Induction Motor ◽  
Air Gap ◽  
Fast Simulation ◽  
Linear Induction ◽  
Linear Induction Motor
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