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

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 operatin...

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Bibliographic Details
Published in:Energies (Basel) 2016-12, Vol.9 (12), p.1075
Main Authors: Lee, Seung-Hwan, Kim, Jae-Hee, Lee, Jun-Ho
Format: Article
Language:English
Subjects:
Aerodynamic drag
coil design
Efficiency
Electric power distribution
Electromagnetic fields
Electromagnetic induction
Electromagnetic radiation
Evaluation
Flux density
hybrid train
inductive power transfer
Maintenance costs
on-line electric vehicle (OLEV)
Radiation
wireless power transfer (WPT)
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en9121075