학술논문
A Dynamic Wireless Charging System Based on Transmitter Module Composed of Coplanar Double Bipolar Pads with Hybrid Compensation Topology
Document Type
Article
Author
Source
Journal of Electrical Engineering & Technology, 19(3), pp.1429-1438 Mar, 2024
Subject
Language
English
ISSN
2093-7423
1975-0102
1975-0102
Abstract
This paper targets to meet three key requirements of dynamic wireless charging system (WCS) for electric vehicles: high output power, misalignment tolerance, and good interoperability. A hybrid wireless charging system with transmitter module composed of coplanar double bipolar pads (BPPs) is designed. The primary side is composed of two BPPs which are driven out of phase to function as bipolar pads for generating larger fundamental magnetic fux height than unipolar pads. A hybrid compensation topology where the decoupled coils in the two BPPs adopt (LCC, S) and (S, LCC) topology, respectively, and that in BPP on the secondary side adopt (LCC, S) topology, forming four coupled coil pairs with LCC-LCC, S–S, S-LCC and LCC-S topologies. This hybrid compensation can efectively restrain the fuctuation of output power caused by the variation of mutual inductance in dynamic charging. And the symmetry of both the pad structure (BPP) and the compensation topologies ensures the transmitter module a good interoperability. The designed system is validated by experimental study on a 6 kW WCS prototype, where the deviations of output power are lower than 2.9% under a 220 mm X-axis misalignment with an efciency higher than 88.6%.