Contactless Pulsed Power Transfer System using Pulsed Power Technology for Running Electric Vehicle

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14211
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: University of Toyama
• Principal Investigator: ITO Hiroaki 富山大学, 大学院理工学研究部(工学), 教授 (70302445)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 非接触給電 / 走行中電気自動車 / 容量移行 / パルス電力技術

Outline of Final Research Achievements

We developed a new type of the contactless power transfer system via the electromagnetic induction to charge electric vehicles (EVs). In the system, the primary coil is installed on the road and the secondary coil is mounted on EV, and has an air gap between the coils. The characteristics of the proposed capacitive charge transfer circuit was evaluated by the numerical simulation and experiment. Experimental and simulation results showed that the charging energy in the capacitor of primary circuit was efficiently transferred to the capacitor in the secondary circuit through the transformer with low coupling coefficient. We could get the important results that the power transfer efficiency reaches the maximum at C1L1/C2L2 = 1.25. We also evaluated the characteristics of transformer with ferromagnetic core, and an air core transformer to develop the transformer with large air gap. Dependence of the coupling coefficients on the air gap length was investigated for both of transformers.

Free Research Field

電力応用工学