Precise Analysis on Mutual Inductance Variation in DynamicWireless Charging of Electric Vehicle
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Date
2018-03-11
Authors
Rakhymbay, Ainur
Khamitov, Anvar
Bagheri, Mehdi
Alimkhanuly, Batyrbek
Lu, Maxim
Phung, Toan
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
Wireless power transfer provides an opportunity to charge electric vehicles (EVs)
without electrical cables. Two categories of this technique are distinguished: Stationary Wireless
Charging (SWC) and DynamicWireless Charging (DWC) systems. Implementation of DWC is more
desirable than SWC as it can potentially eliminate challenges associated with heavy weight batteries
and time-consuming charging processes. However, power transfer efficiency and range, lateral
misalignment of coils as well as implementation cost are issues affecting DWC. These issues need
to be addressed through developing coil architectures and topologies as well as operating novel
semiconductor switches at higher frequencies. This study presents a small-scale dynamic wireless
power transfer system for EV. It specifically concentrates on analyzing the dynamic mutual inductance
between the coils due to the misalignment as it has significant influence on the EV charging process,
particularly, over the output power and overall efficiency. A simulation study is carried out to explore
dynamic mutual inductance profile between the transmitter and receiver coils. Mutual inductance
simulation results are then verified through practical measurements on fabricated coils. Integrating
the practical results into the model, an EV DWC power transfer simulation is conducted and the
relation between dynamic mutual inductance and output power are discussed technically.
Description
Keywords
coil design, Dynamic Wireless Power Transfer (DWPT), electric vehicle (EV), mutual inductance
Citation
Rakhymbay, A.; Khamitov, A.; Bagheri, M.; Alimkhanuly, B.; Lu, M.; Phung, T. Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle. Energies 2018, 11, 624.