scholarly journals Optimization of the Alignment Method for an Electric Vehicle Magnetic Field Wireless Power Transfer System Using a Low-Frequency Ferrite Rod Antenna

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4689 ◽  
Author(s):  
Jae Yong Seong ◽  
Sang-Sun Lee
Keyword(s):  
Magnetic Field ◽  
Electric Vehicle ◽  
Low Frequency ◽  
Wireless Power Transfer ◽  
International Electrotechnical Commission ◽  
Power Transfer ◽  
Wireless Power ◽  
Optimal Arrangement ◽  
Positioning Method ◽  
Secondary Device

The establishment of international and regional standards for electric vehicle (EV) magnetic field wireless power transfer (MF-WPT) systems started in 2010 by the Society of Automotive Engineers (SAE). In the meantime, the EV MF-WPT standardization has been focused on primary device and secondary device topology. Recently, the International Organization for Standardization (ISO), the International Electrotechnical Commission (IEC), and SAE have begun describing the communication and alignment techniques for EV MF-WPT. In this paper, we present a fine positioning method using a low-frequency (LF) signal, as mentioned in IEC 61980 and SAE J2954. Through modeling and simulation, we optimized a LF ferrite rod antenna (FRA) for EV MF-WPT fine positioning. We also found the optimal arrangement of LF-FRAs on primary device and secondary device Finally, we used a test bench to experiment and check the results of our proposal.

scholarly journals Wireless power transfer (WPT) system for an electric vehicle (EV): how to shield the car from the magnetic field generated by two planar coils

2017 ◽  
Vol 5 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Tommaso Campi ◽  
Silvano Cruciani ◽  
Valerio De Santis ◽  
Francesca Maradei ◽  
Mauro Feliziani
Keyword(s):  
Magnetic Field ◽  
Electric Vehicle ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Automotive Applications ◽  
Wireless Power ◽  
Safety Standards ◽  
Charging System ◽  
Weak Points ◽  
The Magnetic Field

This paper deals with the shielding of the magnetic field generated by two planar coils of a wireless power transfer (WPT) system at the frequency of tens of kilohertz used in automotive applications. Different shielding techniques using conductive and magnetic materials are examined and discussed highlighting strong and weak points of each other. Finally, the proposed shielding configuration consisting of a combined conductive and magnetic material is applied to model an electric vehicle equipped with a WPT charging system. With this configuration, compliance with the electromagnetic field safety standards can be achieved inside (passengers) or near (pedestrian) the car.

scholarly journals A case Study on wired and Wireless charger standards in India for Electric Vehicle Application

2019 ◽  
Vol 87 ◽  
pp. 01017
Author(s):  
Shivanand M N ◽  
Y. Maruthi ◽  
Phaneendra Babu Bobba ◽  
Sandeep Vuddanti
Keyword(s):  
Electric Vehicle ◽  
Electric Vehicles ◽  
Energy Demand ◽  
Wireless Power Transfer ◽  
International Electrotechnical Commission ◽  
Power Transfer ◽  
Wireless Power ◽  
Transfer Factors ◽  
Charging Infrastructure ◽  
Ev Charging

India has taken major step in adopting the electric vehicle by means of FAME Scheme (Fast Adoption and Manufacturing of Electric Vehicles), a government initiative. ARAI (Automotive Research Authority of India) and DHI (Department of Heavy Industry) have published standardization protocol for both EV charging infrastructure. Many of those standards are derived from the SAE (Society of Automotive Engineers) Internationals and IEC (International Electrotechnical Commission). USA, Europe and China are also following the same standards to build the EV (Electric Vehicle) infrastructure. This paper provides the Indian standards to build EV charging infrastructure and comparing it with other countries. Glimpses on energy demand for electric vehicles in Indian market. It also provides the demanding wireless power transfer technology in EV’s. Status of Standards provided by the industry on wireless power transfer. Factors that are necessary to be considered before drafting the standards for WPT.

scholarly journals Improved Calculation Method of Coupling Factors for Low-Frequency Wireless Power Transfer Systems

2021 ◽  
Vol 19 (1) ◽  
pp. 44
Author(s):  
Jangyong Ahn ◽  
Seon-Eui Hong ◽  
Haerim Kim ◽  
Kyunghwan Song ◽  
Hyung-Do Choi ◽  
...  
Keyword(s):  
Human Body ◽  
Calculation Method ◽  
Low Frequency ◽  
Wireless Power Transfer ◽  
International Electrotechnical Commission ◽  
Internal Electric Field ◽  
Power Transfer ◽  
Wireless Power ◽  
Coupling Factors ◽  
Human Body Models

The concept of a coupling factor was introduced in International Electrotechnical Commission (IEC) 62311 and 62233 to provide a product safety assessment that considers the localized exposure when an electromagnetic field (EMF) source is close to the human body. To calculate the coupling factors between the human body and EMF source, a numerical calculation should be carried out to calculate the internal quantities of the human body models. However, at frequencies below 10 MHz, the computed current density or internal electric field has computational artifacts from segmentation or discretization errors. Specifically, coupling factors are calculated based on the maximum values, which may include computational artifacts due to abnormal peaks. In this study, we propose an improved calculation method to remove computational artifacts by applying the 99.99th percentile in calculating the coupling factors without underestimation. The performance of the proposed method is verified through a comparison based on various human body models with wireless power transfer (WPT) systems and compliance with the reference levels and basic restrictions. The results indicate that the proposed method can provide uniform coupling factors by reducing the computational errors by up to 65.3% compared to a conventional method.

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