Abstract
In order to promote the driving range of the electric vehicles (EVs), decrease the demand for large capacity battery and create more charging opportunities for the EVs, the static-dynamic hybrid wireless charging system is presented to utilize waiting time of traffic lights at intersections to replenish electricity in this paper. Firstly, the topology and principle of the proposed static-dynamic hybrid wireless charging system with short-segmented coils at traffic lights are introduced. Secondly, the general circuit model of the static-dynamic hybrid wireless charging system with multi-coupling between the primary and secondary sides is developed. The design method of the compensation circuit in primary side based on the number and the positions of the energized primary coils is investigated. After analyzing the characteristics of the system varying with the position of the single load, the control conceptions of the energizing mode alternating in primary side and the combination of the primary compensation capacitors are put forward. Then the power stabilization control strategy of the static-dynamic hybrid wireless charging system with multi short-segmented coils and multi loads is proposed. Finally, the theoretical analyses are verified with the experiments.
Highlights
In recent years, the energy crisis and environmental problems have accelerated the development of electric vehicles (EVs)
On the basis of the structure of the static-dynamic hybrid wireless charging system, this paper focuses on the control of the energizing mode alternating in primary side and the combination of the primary compensation capacitors according to the number and positions of the loads
After turning on the segmented primary coils related to the near secondary coils and selecting the corresponding primary compensation capacitor according to the control strategy, the energy is transferred wirelessly from the road side to the EVs through the magnetic coupling between the primary and secondary coils
Summary
The energy crisis and environmental problems have accelerated the development of electric vehicles (EVs). Connection topologies of the segmented coils and the compensation capacitors in primary side can be adaptively changed according to the number and locations of EVs to solve the power fluctuation problem in the dynamic process of loads. On the basis of the structure of the static-dynamic hybrid wireless charging system, this paper focuses on the control of the energizing mode alternating in primary side and the combination of the primary compensation capacitors according to the number and positions of the loads. To deal with the random variation of the number and the positions of the EVs, the power stabilization control strategy of the static-dynamic hybrid wireless charging system with multi short-segmented coils and multi loads is put forward based on the switching control of the segmented coils and the multiple compensation circuit in primary side.
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