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Appl. Sci. 2017, 7(5), 481; doi:10.3390/app7050481

Variable Pole Pitch Electromagnetic Propulsion with Ladder-Slot-Secondary Double-Sided Linear Induction Motors

School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
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Author to whom correspondence should be addressed.
Academic Editor: Antonio Ficarella
Received: 28 February 2017 / Revised: 27 April 2017 / Accepted: 28 April 2017 / Published: 6 May 2017
(This article belongs to the Section Energy)
View Full-Text   |   Download PDF [3168 KB, uploaded 6 May 2017]   |  

Abstract

In this paper, we propose a novel variable pole pitch (VPP) electromagnetic (EM) propulsion technique using a series of ladder-slot-secondary double-sided linear induction motors (LS-secondary DLIMs). An equivalent circuit is developed for the LS-secondary DLIM, which considers the distribution of the eddy current in the ladders and the end effect. This equivalent circuit forms the basis for the subsequent design, numerical analysis, and optimization. The primary purpose of the VPP EM propulsion system is to address several obstacles encountered in high-speed large-thrust applications of LIMs, such as power factor improvement, optimization considering supply frequency constraint and operating kinetics, etc. The equivalent circuit of the LS-secondary DLIM, i.e., the theoretical foundation of the VPP EM propulsion, has been validated via simulation and experimentation on a small-scale platform, which proves that the numerical analysis of the VPP EM propulsion is effective. View Full-Text
Keywords: electromagnetic propulsion; equivalent circuit; linear induction motor; ladder-slot secondary; numerical analysis; variable pole pitch electromagnetic propulsion; equivalent circuit; linear induction motor; ladder-slot secondary; numerical analysis; variable pole pitch
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Di, J.; Fan, Y.; Liu, Y.; Liu, S.; Zhu, Y. Variable Pole Pitch Electromagnetic Propulsion with Ladder-Slot-Secondary Double-Sided Linear Induction Motors. Appl. Sci. 2017, 7, 481.

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