scholarly journals Development and Implementation of High Precision Positioning Technology for Electric Vehicle Wireless Charging Coils

2021 ◽  
Author(s):  
Jie Li ◽  
Kejun Qian ◽  
Yafei Li ◽  
Yi Liu ◽  
Zifeng Liu ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Influence Factors ◽  
Electric Energy ◽  
Practical Significance ◽  
Wireless Charging ◽  
Charging System ◽  
Positioning Method ◽  
Simulation And Experiment ◽  
Receiving Coil ◽  
Work Done

This paper mainly studies the development and implementation of the positioning technology of the electric vehicle wireless charging coil, so as to accurately detect the position deviation of the receiving coil, so that the electric vehicle wireless charging system can provide electric energy for electric vehicles more efficiently. Based on the positioning method of electric vehicle based on three detection coils, this paper proposes a calculation method to describe the offset degree of coil based on fuzzy mathematics theory. The algorithm is verified by simulation and experiment, and the influence factors of the error accuracy and the source of the error are analyzed. The work done in this paper has a strong practical significance for the efficient realization of electric vehicle wireless energy transmission.

Analysis of Assistant Reactive Shielding Coil for Electric Vehicle Wireless Charging System

2020 ◽  
Author(s):  
Shiliang Hou ◽  
Bo Yu ◽  
Wei Yan ◽  
Chongming Zhu ◽  
Ke Wang ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Wireless Charging ◽  
Charging System

scholarly journals Efficient wireless charging system for supercapacitor-based electric vehicle using inductive coupling power transfer technique

2019 ◽  
Vol 11 (11) ◽  
pp. 168781401988696
Author(s):  
Ahsan Elahi ◽  
Arslan Ahmed Amin ◽  
Umar Tabraiz Shami ◽  
Muhammad Tayyab Usman ◽  
Muhammad Sajid Iqbal
Keyword(s):  
Electric Vehicle ◽  
Inductive Coupling ◽  
Wireless Charging ◽  
Power Transfer ◽  
Charging System ◽  
Energy Demands ◽  
Experimental Implementation ◽  
Power Transfer Efficiency ◽  
The Cost ◽  
Mathematical Relationships

Wireless charging has become an emerging challenge to reduce the cost of a conventional plug-in charging system in electric vehicles especially for supercapacitors that are utilized for quick charging and low-energy demands. In this article, the design of an efficient wireless power transfer system has been presented using resonant inductive coupling technique for supercapacitor-based electric vehicle. Mathematical analysis, simulation, and experimental implementation of the proposed charging system have been carried out. Simulations of various parts of the systems are carried out in two different software, ANSYS MAXWELL and MATLAB. ANSYS MAXWELL has been used to calculate the various parameters for the transmitter and receiver coils such as self-inductance ( L), mutual inductance ( M), coupling coefficient ( K), and magnetic flux magnitude ( B). MATLAB has been utilized to calculate output power and efficiency of the proposed system using the mathematical relationships of these parameters. The experimental setup is made with supercapacitor banks, electric vehicle, wattmeters, controller, and frequency generator to verify the simulation results. The results show that the proposed technique has better power transfer efficiency of more than 75% and higher power transfer density using a smaller coil size with a bigger gap of 4–24 cm.

scholarly journals Privacy-Preserving Billing Scheme against Free-Riders for Wireless Charging Electric Vehicles

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Xingwen Zhao ◽  
Jiaping Lin ◽  
Hui Li
Keyword(s):  
Electric Vehicle ◽  
Electric Energy ◽  
Privacy Preserving ◽  
Sequential Data ◽  
Wireless Charging ◽  
Free Riders ◽  
The Road ◽  
On Line ◽  
5G Systems ◽  
On The Road

Recently, scientists in South Korea developed on-line electric vehicle (OLEV), which is a kind of electric vehicle that can be charged wirelessly while it is moving on the road. The battery in the vehicle can absorb electric energy from the power transmitters buried under the road without any contact with them. Several billing schemes have been presented to offer privacy-preserving billing for OLEV owners. However, they did not consider the existence of free-riders. When some vehicles are being charged after showing the tokens, vehicles that are running ahead or behind can switch on their systems and drive closely for a free charging. We describe a billing scheme against free-riders by using several cryptographic tools. Each vehicle should authenticate with a compensation-prepaid token before it can drive on the wireless-charging-enabled road. The service provider can obtain compensation if it can prove that certain vehicle is a free-rider. Our scheme is privacy-preserving so the charging will not disclose the locations and routine routes of each vehicle. In fact, our scheme is a fast authentication scheme that anonymously authenticates each user on accessing a sequence of services. Thus, it can be applied to sequential data delivering services in future 5G systems.

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