Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 30, Issue 11, Pages 6213-6220Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2015.2414453
Keywords
Contactless charging; electromagnetic field analysis; misalignment; move-and-charge; wireless power transfer (WPT)
Categories
Funding
- University of Hong Kong, Hong Kong [SPF 201409176172, SPF 201109176034]
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This paper presents a homogeneous wireless power transfer (WPT) technique to continuously energize the moving target. Due to the mobility of the charging target, the misalignment between the primary and secondary coils inevitably deteriorates the energy transfer performance by adopting the conventional WPT technique, so the constant energization mechanism is the most important issue for move-and-charge systems. The proposed homogeneous WPT technique utilizes the alternate winding design to gaplessly assemble primary coils, aiming to enhance the magnetic flux density. Besides, the vertical-and-horizontal secondary coil is also implemented to further improve the capability of acquiring energy for charging targets, especially in the area of the coils gap. In such ways, the proposed homogeneous WPT technique can effectively fulfil a continuous charging mechanism for moving targets. Also, this paper deduces the equivalent circuit model to analyze the mutual effect among multiple primary coils, which offers the theory-based view for the design of move-and-charge systems. Besides, both simulation and experimental results are provided to verify the feasibility of the proposed homogeneous WPT technique for move-and-charge systems.
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