Development of a 60 kHz, 180 kW, Over 85% Efficiency Inductive Power Transfer System for a Tram

Seung-Hwan Lee, Jae-Hee Kim and Jun-Ho Lee
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Seung-Hwan Lee: School of Electrical and Computer Engineering, University of Seoul, Seoul 02504, Korea
Jae-Hee Kim: Metropolitan Transportation Research Center, Korea Railroad Research Institute, Uiwang 16105, Korea
Jun-Ho Lee: Metropolitan Transportation Research Center, Korea Railroad Research Institute, Uiwang 16105, Korea

Energies, 2016, vol. 9, issue 12, 1-15

Abstract: Conventional contact-based train power transfer systems have high maintenance costs and safety issues and cause noise and additional aerodynamic drag. Instead of the conventional system, a loosely coupled online wireless power transfer (WPT) system for a train is proposed in this paper. The operating frequency of the proposed design is 60 kHz to ensure a low flux density and a high-efficiency system with a large air gap. In addition, a new transmitter track and pick-up geometry for 60 kHz operation are designed using finite element analysis (FEA). The proposed design is evaluated theoretically and experimentally. By using the simulated results, a new 180 kW, 15 m test-bed for a tram is constructed. The total power transfer efficiency is greater than 85% at the rated output power, and the loss distribution in the system is identified. Electromagnetic field (EMF) radiation and the voltage induction at the rail are measured for safety evaluation. The measured EMF satisfied international guidelines.

Keywords: wireless power transfer (WPT); inductive power transfer; on-line electric vehicle (OLEV); coil design; hybrid train (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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