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Open AccessArticle

85 kHz Band 44 kW Wireless Rapid Charging System for Field Test and Public Road Operation of Electric Bus

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Wireless System Laboratory, Corporate R&D Center, R&D Division, Toshiba Corporation, 1, Komukai-Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, Japan
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Center For Semiconductor Research & Development, Toshiba Electronic Devices & Storage Corporation, 580-1 Horikawacho, Saiwai-ku, Kawasaki 212-8520, Japan
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Infrastructure Systems R&D Center, R&D Division, Toshiba Infrastructure Systems & Solutions Corporation, 1, Toshiba-cho, Fuchu 183-8511, Japan
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ICT Solutions Division, Toshiba Digital Solutions Corporation, 72-34, Horikawa-cho, Saiwai-ku, Kawasaki 212-8585, Japan
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Railway System Division, Toshiba Infrastructure Systems & Solutions Corporation, 72-34, Horikawa-cho, Saiwai-ku, Kawasaki 212-8585, Japan
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Graduate School of Environment and Energy Engineering, Waseda University, 3-4-1, Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
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Author to whom correspondence should be addressed.
World Electr. Veh. J. 2019, 10(2), 26; https://doi.org/10.3390/wevj10020026
Received: 19 April 2019 / Revised: 18 May 2019 / Accepted: 20 May 2019 / Published: 23 May 2019
Wireless charging technology for heavy-duty vehicles has been investigated for eco-friendly transportation. We present a new wireless power transfer system for 44 kW rapid charging of electric buses. The transmission distance between the charging pads is from 10 to 13 cm. The large air gap can be fulfilled by the ordinary kneeling function, equipped on most low-floor buses. Dual-block parallel transmission with opposite-phase-current-feeding suppresses magnetic radiation. The system operates in the common 85 kHz band with the light-duty vehicle system. The result of the field test and the public road operation of two electric buses confirm the CO2 reduction effect described. View Full-Text
Keywords: wireless battery charging; electric bus; magnetic emission; rapid charging; CO2 reduction wireless battery charging; electric bus; magnetic emission; rapid charging; CO2 reduction
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Obayashi, S.; Shijo, T.; Suzuki, M.; Moritsuka, F.; Ogawa, K.; Ogura, K.; Kanekiyo, Y.; Ishida, M.; Takanaka, T.; Tada, N.; Takeuchi, F.; Take, S.; Yamauchi, Y.; Yang, W.-H.; Kamiya, Y. 85 kHz Band 44 kW Wireless Rapid Charging System for Field Test and Public Road Operation of Electric Bus. World Electr. Veh. J. 2019, 10, 26.

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