Wireless power transmission through a reinforced concrete plate using circuits resonating at common utility frequency

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K13934
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: National Institute of Technology, Toyama College
• Principal Investigator: Furukawa Hiroto 富山高等専門学校, 電気制御システム工学科, 准教授 (30238670)
• Co-Investigator(Kenkyū-buntansha): 石田 弘樹 岡山理科大学, 理学部, 准教授 (50413761) ; 経田 僚昭 富山高等専門学校, 商船学科, 准教授 (50579729)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ワイヤレス給電 / 超低周波

Outline of Final Research Achievements

To achieve wireless power transfer (WPT) through a metal steel plate, a super-low frequency (SLF) was used as a resonance frequency. In this study, we designed lightweight coils using a WPT simulator that we developed previously. As a result, the weight was reduced to 1.69 kg from 11.9 kg, the previous coil weight. At a resonance frequency of 400 Hz, the transmission efficiency and output power of advanced SLF-WPT reached 91% and 426 W, respectively, over a transmission distance of 30 mm. Furthermore, 80% efficiency and 317 W output were achieved when transmitting power through a 1 mm-thick stainless-steel plate. This performance is much better than that in previous reports.

Free Research Field

パワーエレクトロニクス