A Comprehensive Investigation of Thermal Risks in Wireless EV Chargers Considering Spatial Misalignment From a Dynamic Perspective

As wireless electric vehicle charging (WEVC) technology moves toward commercialization, understanding its associated risks is crucial, particularly with the trend toward high-power fast charging. In this article, thermal risks and factors exacerbating the risks in wireless electric vehicle chargers...

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Published inIEEE journal of emerging and selected topics in industrial electronics (Print) Vol. 5; no. 4; pp. 1560 - 1571
Main Authors Niu, Songyan, Zhao, Qingyu, Niu, Shuangxia, Jian, Linni
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Ambient temperature
Coils
Commercialization
Couplers
Electric power loss
Electric vehicle (EV)
Electric vehicle charging
Electric vehicles
foreign object detection (FOD)
Heating systems
inductive power transfer
Industrial electronics
Magnetic cores
Misalignment
Object recognition
Risk levels
Risk management
temperature
Thermal analysis
Wireless communication
Online AccessGet full text
ISSN2687-9735
2687-9743
DOI10.1109/JESTIE.2024.3417244

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Abstract As wireless electric vehicle charging (WEVC) technology moves toward commercialization, understanding its associated risks is crucial, particularly with the trend toward high-power fast charging. In this article, thermal risks and factors exacerbating the risks in wireless electric vehicle chargers are investigated comprehensively, focusing on the magnetic coupler and foreign objects (FOs) intruding on the charging area. The power losses and temperatures of the coupler and FOs are obtained using a two-way electromagnetic-thermal coupled model, and the coupler will be assigned to a risk level according to the proposed four-temperature-level risk evaluation mechanism. In this model, practical considerations include coil types, misalignments, FO materials, ambient temperatures, etc. Moreover, a dynamic perspective is used to characterize the trend of risks so as to provide predictive insights. To validate the newly identified risks, two 6.6-kW WEVC prototypes are built employing circular coils and DD coils, respectively. The experimental studies confirm the necessity of implementing thermal risk management strategies for magnetic coupler under misaligned conditions, such as enhanced cooling, including a wider range of materials for foreign object detection (FOD), expanding the FOD area, and so forth.
AbstractList As wireless electric vehicle charging (WEVC) technology moves toward commercialization, understanding its associated risks is crucial, particularly with the trend toward high-power fast charging. In this article, thermal risks and factors exacerbating the risks in wireless electric vehicle chargers are investigated comprehensively, focusing on the magnetic coupler and foreign objects (FOs) intruding on the charging area. The power losses and temperatures of the coupler and FOs are obtained using a two-way electromagnetic-thermal coupled model, and the coupler will be assigned to a risk level according to the proposed four-temperature-level risk evaluation mechanism. In this model, practical considerations include coil types, misalignments, FO materials, ambient temperatures, etc. Moreover, a dynamic perspective is used to characterize the trend of risks so as to provide predictive insights. To validate the newly identified risks, two 6.6-kW WEVC prototypes are built employing circular coils and DD coils, respectively. The experimental studies confirm the necessity of implementing thermal risk management strategies for magnetic coupler under misaligned conditions, such as enhanced cooling, including a wider range of materials for foreign object detection (FOD), expanding the FOD area, and so forth.
Author Jian, Linni
Zhao, Qingyu
Niu, Shuangxia
Niu, Songyan
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SubjectTerms Ambient temperature
Coils
Commercialization
Couplers
Electric power loss
Electric vehicle (EV)
Electric vehicle charging
Electric vehicles
foreign object detection (FOD)
Heating systems
inductive power transfer
Industrial electronics
Magnetic cores
Misalignment
Object recognition
Risk levels
Risk management
temperature
Thermal analysis
Wireless communication
Title A Comprehensive Investigation of Thermal Risks in Wireless EV Chargers Considering Spatial Misalignment From a Dynamic Perspective
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