Analysis of magnetic field distribution and parameter calculation of linear induction motor with novel winding construction

Author(s):  
Jin Xu ◽  
Weiming Ma ◽  
Junyong Lu ◽  
Zhaolong Sun ◽  
Yuxing Zhang
2001 ◽  
Vol 37 (4) ◽  
pp. 2841-2843 ◽  
Author(s):  
D. Roy ◽  
A. Fujiyoshi ◽  
S. Yamada ◽  
M. Iwahara

2008 ◽  
Vol 144 ◽  
pp. 136-139 ◽  
Author(s):  
Bronius Karaliunas ◽  
Edvardas Matkevicius

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.


2012 ◽  
Vol 433-440 ◽  
pp. 6843-6849 ◽  
Author(s):  
Huai Ji Lu ◽  
Yu Mei Du

several 2-D FEM models of SLIM with different kinds of secondary conductor structures are developed and analyzed based on certain equitable prerequisite. The computed magnetic field of different secondary conductor structures is analyzed, and the research results may give references on the optimization of secondary conductor structure.


2008 ◽  
Vol 392-394 ◽  
pp. 551-554 ◽  
Author(s):  
Xi Lin Zhu ◽  
Shi Ju E ◽  
Chun Fu Gao

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.


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