Electrical engineering

Physics

Automotive engineering

Topology (electrical circuits)

Battery pack

Electromagnetic coil

Mathematics

Capacitor

Wireless

Biology

Inductor

Engineering

Voltage

Series (stratigraphy)

Paleontology

Power (physics)

Grid

Electric vehicle

Electronic engineering

Geometry

Wireless power transfer

Computer science

Battery (electricity)

Quantum mechanics

Maximum power transfer theorem

Telecommunications

IEEE Transactions on Power Electronics

Electric vehicles (EVs) are becoming increasingly popular as a mean of mitigating issues associated with fossil fuel consumption in transportation systems. A wireless inductive power transfer (IPT) interface between EV and the utility grid has several key advantages, such as safety, convenience, and isolation. However, physical misalignments between the pads of IPT charging systems used in EVs are unavoidable and cause variations in key system parameters, significantly increasing losses and affecting power throughput. This paper presents a novel series-hybrid topology in which the series inductors of the primary and pick-up inductor-capacitor-inductor (LCL) networks are integrated into polarized magnetic couplers to improve the system performance under pad misalignment. A mathematical model is developed to investigate the behavior of the proposed system under misalignment. To demonstrate the viability of the proposed method, the results of a 3.3-kW prototype series-hybrid IPT system are presented, benchmarked against a conventional IPT system. Experimental results clearly indicate that the proposed system maintains the output power within ±5% of its rated power despite the pad misalignment. The proposed system is efficient, reliable, and cost effective in comparison to conventional LCL- and CL-compensated IPT systems.

A Misalignment-Tolerant Series-Hybrid Wireless EV Charging System With Integrated Magnetics