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Open AccessArticle

Design of a Tubular Permanent Magnet Actuator for Active Lateral Secondary Suspension of a Railway Vehicle

1
Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea
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Center for Information Storage Device, Yonsei University, Seoul 03722, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Chien-Hung Liu
Appl. Sci. 2017, 7(2), 152; https://doi.org/10.3390/app7020152
Received: 9 December 2016 / Revised: 1 February 2017 / Accepted: 4 February 2017 / Published: 8 February 2017
This paper describes the finite element (FE)-based design of a slotted tubular permanent magnet actuator (TPMA) used in railway vehicle active lateral secondary suspension that improves the actuator’s thrust and lowers its cogging force under thermal and geometric constraints. To consider the electromagnetic and thermal fields and the complex interactions among the design variables, design was carried out in an electromagnet and thermal field environment using accurate and time-effective FE analysis. A six-slot prototype model was fabricated to estimate critical thermal parameters, which are difficult to compute without experiments. Three-dimensional FE analysis using the determined thermal parameters was adopted to calculate the precise thermal distribution of the TPMA and verify the forced air-cooling effect. A prototype TPMA with a quasi-Halbach array of permanent magnets and a moving magnet was manufactured through the FE-based design process; the dynamic, electromagnetic, and thermal characteristics of the prototype TPMA were validated experimentally. View Full-Text
Keywords: tubular permanent magnet actuator; active suspension; electromagnetic field analysis; heat transfer analysis tubular permanent magnet actuator; active suspension; electromagnetic field analysis; heat transfer analysis
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Yoon, J.-H.; Kim, D.; Park, N.-C.; Park, Y.-P. Design of a Tubular Permanent Magnet Actuator for Active Lateral Secondary Suspension of a Railway Vehicle. Appl. Sci. 2017, 7, 152.

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