Abstract
In order to solve the problem of the electric vehicle (EV) charging amount fluctuation caused by the variation of driving speed during dynamic wireless charging, this paper proposes an EV dynamic wireless charging control method adapting to speed change. Firstly, a dynamic wireless charging model based on a long-track transmitting coil is established, and the expression of the charging power of each load under multi-load situation is obtained. Secondly, the influence of the EV charging number and maximum driving speed on the range of system parameters is studied. Subsequently, the method for determining the load resistance value according to the driving speed under a multi-EV charging condition is further discussed. Afterwards, a charging power control method adapting to the speed variation by load adjustment is proposed. By adjusting the equivalent load of the variable-speed charging EV, its speed variation range can reach 20~60 km/h, while the remaining EVs’ charging power fluctuation range can be kept within 10%~15%. Finally, the experimental prototype is built to verify the above-mentioned control method.
Highlights
With the development of human society, the problem of global warming caused by greenhouse gas emission has intensified and the importance of energy conservation and emission reduction becomes more and more prominent [1,2]
To realize the dynamic wireless power transmission (DWPT) for electric vehicle (EV), a dynamic wireless charging area can be formed by laying a long wireless power transmitting coil beneath the road surface; a power receiving coil is mounted on the vehicle chassis, the electric power can be rectified and supplied to EVs’ battery by means of Energies 2019, 12, x FOR PEER REVIEW
The method of adjusting the charging power according to the driving speed by changing the load resistance is mainly discussed
Summary
Linlin Tan 1,2 , Wenxuan Zhao 1,2 , Minghao Ju 3 , Han Liu 1,2 and Xueliang Huang 1,2, *. Shanghai Aerospace Control Technology Institute, No.1555, Zhongchun Road, Minhang District, Shanghai
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