|Table of Contents|

 Characteristic analysis of no-load speed of linear induction motor(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2014年07
Page:
37-43
Research Field:
Publishing date:

Info

Title:
 Characteristic analysis of no-load speed of linear induction motor
Author(s):
SI Ji-kai
AI Li-wang
HAN Jun-bo
XU Xiao-zhuo
SHANGGUAN Xuan-feng
 School of Electrical Engineering and Automation, Henan Polytechnic University,Jiaozuo 454000,China
Keywords:
 Key words:linear motorsend-effectno-load speedequivalent electromagnetic pole pitchnumber of poles
PACS:
TM 359. 4
DOI:
-
Abstract:
 Abstract:There is a special phenomenon in linear arc-shaped motor and linear induction motor with finite-length primary. Their no-load rotating(translational)speeds exceed the so-called synchronous
speed. With a simplified single一sided linear induction motor ( SLIM)as the research object,the mathematical model of the motor was established by using Maxwell’s equations. Air gap and end region magnetis field distribution considering dynamic longitudinal end effect was calculated. A physical quantity“Equivalent electromagnetic pole pitch" considering the dynamic longitudinal end effects was proposed and correction coefficients corresponding to mechanical pole pitch with different number of poles was given.
Finally,the rationality of the analytical method and validity of correction coefficients were verified by finite element method( FEM) simulation software and prototype testing. It can be concluded that no-load speed does not exceed the synchronous speed calculated by“Equivalent electromagnetic pole pitch" and just exceeds the synchronous speed calculated by mechanical pole pitch. It has some informative values to the theoretical research and development of linear induction motor.

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Memo

Memo:
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Last Update: 2015-07-18