A Three-Phase Dynamic Wireless Charging System with Constant Output Voltage

Ruikun Mai, Hongchao Li, Yeran Liu, Kunzhuo Zhou, Ling Fu and Zhengyou He
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Ruikun Mai: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Hongchao Li: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Yeran Liu: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Kunzhuo Zhou: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Ling Fu: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Zhengyou He: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Energies, 2018, vol. 11, issue 1, 1-12

Abstract: A dynamic wireless power transfer (WPT) system is an effective method, which can reduce charging time and extend the driving range of the electric vehicles. In the dynamic WPT systems, the output voltage may fluctuate when the receiver moves along the transmitter coils. This paper proposes a three-phase dynamic WPT charging system with overlapped three-phase transmitter coils. The overlap length is optimized to depress the fluctuation of the output voltage. These coils are powered by a three-phase inverter to generate an even magnetic field, and a unipolar coil is employed as a receiver to simplify the coil structure of the secondary side. Based on the proposed three-phase coil structure, the output voltage characteristics of the system are analyzed in detail. A 500 W dynamic charging prototype is established to validate the proposed dynamic charging system. Experimental results show that the output voltage fluctuation is within ±3.05%. The maximum system efficiency reaches 89.94%.

Keywords: wireless power transfer; three-phase inverter; dynamic charging (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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