85 kHz Band 44 kW Wireless Rapid Charging System for Field Test and Public Road Operation of Electric Bus
Abstract
:1. Introduction
2. Materials and Methods
2.1. Principal Specification of 85 kHz Band 44 kW Wireless Charging System for Electrice Buses
2.2. Block diagram of 85 kHz band 44 kW Wireless Charging System
2.3. Dual-Block Parallel Transmission for Suppression of Magnetic Radiation
2.4. Diagonal Placement of Two Sets of Solenoid Pads to Reduce Interference Couplings
3. Results
3.1. In-Situ Measurement of Magnetic Radiation from Wireless Charging System Installed in Parking Lots
3.1.1. Transmission Equipment in Parking Lot
3.1.2. Receiving Equipment Installed in Small Buses and Medium-Sized Buses
3.1.3. In-Situ Measurement of DC Charging Power, Power Efficiency and Magnetic Radiation
3.2. Field Test of Emulated Bus Operation on Public Roads
4. Discussion
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Item | Specification |
---|---|
Input power | 3 phase 200V |
Transfer frequency | 81.93 kHz in 85 kHz band |
Receive power | 44 kW |
Misalignment tolerance of charging pads | ±10 cm min. |
Transmission distance between charging pads | 10 thru 13 cm |
Total power transmission efficiency | >85% |
Configuration of charging pads | Two sets of transmit and receive charging pads |
Radio communication for control | 2.4 GHz wireless LAN |
Bus Type | Small Electric Bus | Medium-Size Electric Bus |
---|---|---|
Period | From February 2016 to January 2017 | |
Route | Approximately 6 km between ANA business centers in Tonomachi, Kawasaki and Higashi-Kojiya, Ota-ku, Tokyo | Approximately 11 km between ANA business centers in Tonomachi, Kawasaki and Haneda Airport |
Frequency | 4 round trips a day | 3 round trips a day |
Charge time | Approximately 15 minutes | Approximately 20 minutes |
Passengers | ANA Group employees | |
Effect of CO2 emission reduction | 42% | 60% |
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Share and Cite
Obayashi, S.; Shijo, T.; Suzuki, M.; Moritsuka, F.; Ogawa, K.; Ogura, K.; Kanekiyo, Y.; Ishida, M.; Takanaka, T.; Tada, N.; et al. 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. https://doi.org/10.3390/wevj10020026
Obayashi S, Shijo T, Suzuki M, Moritsuka F, Ogawa K, Ogura K, Kanekiyo Y, Ishida M, Takanaka T, Tada N, et al. 85 kHz Band 44 kW Wireless Rapid Charging System for Field Test and Public Road Operation of Electric Bus. World Electric Vehicle Journal. 2019; 10(2):26. https://doi.org/10.3390/wevj10020026
Chicago/Turabian StyleObayashi, Shuichi, Tetsu Shijo, Masatoshi Suzuki, Fumi Moritsuka, Kenichirou Ogawa, Koji Ogura, Yasuhiro Kanekiyo, Masaaki Ishida, Toru Takanaka, Nobumitsu Tada, and et al. 2019. "85 kHz Band 44 kW Wireless Rapid Charging System for Field Test and Public Road Operation of Electric Bus" World Electric Vehicle Journal 10, no. 2: 26. https://doi.org/10.3390/wevj10020026