Wireless charging system for electric bicycle application

Nguyen Thi Diep (Hanoi University of Science and Technology)
Nguyen Kien Trung (Hanoi University of Science and Technology)
Tran Trong Minh (Electric Power University)

International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 11, No 4: December 2020

This paper presents a design of the wireless charging system for e-byke applications. The double-side LCC compensation circuit is used to achieve high efficiency and reduce the volt-ampere rating. A new constant current/voltage (CC/CV) charging control method at the transmitter side is proposed to avoid dual side wireless communication. This paper also presents a simple method of estimating both the coupling coefficient and load impedance only from the transmitter side. A wireless charging system of 2.5kW is built. Error in the CC/CV charging mode is 3.3% and 1.12%, respectively. System efficiency reaches 92.1% in CC charging mode.