scholarly journals An Optimized Design of an Electric Vehicle Wireless Charging Coupling Coil

2021 ◽  
Vol 2125 (1) ◽  
pp. 012035
Author(s):  
Wei Xie ◽  
Qi-gong Chen ◽  
Shou-zhong Lei
Keyword(s):  
Energy Loss ◽  
Electric Vehicle ◽  
Structural Parameters ◽  
Transmission Efficiency ◽  
Optimized Design ◽  
Transmission Power ◽  
Wireless Charging ◽  
Element Analysis ◽  
Charging System ◽  
Coupling Coil

Abstract With the development of electric vehicle wireless charging technology, the transmission power and transmission efficiency of electric vehicle wireless charging system have become the focus of current research. The transmission power and efficiency of wireless charging system largely depend on the energy loss of two resonant coupling coils. The energy loss is mainly related to the structural parameters of the coupling coil and the coupling coefficient of the two coils. On this basis, the structure of the coupling coil is designed and optimized by using the finite element analysis software Maxwell, and a new combined transmitting coil structure is designed. Experiments and verification show that the coil design meets the requirements of transmission efficiency, which can provide a reference for the design of wireless charging coil of electric vehicle in the future.

scholarly journals Optimization of Ferrites Structure by Using a New Core-Less Design Algorithm for Electric Vehicle Wireless Power Transfer

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2590
Author(s):  
Kaiwen Chen ◽  
J. F. Pan ◽  
Yun Yang ◽  
Ka Wai Eric Cheng
Keyword(s):  
Coupling Coefficient ◽  
Core Loss ◽  
Transmission Efficiency ◽  
Total Efficiency ◽  
Optimized Design ◽  
Wireless Charging ◽  
Energy Storage Devices ◽  
Element Analysis ◽  
Design Algorithm ◽  
The Core

In order to improve the customers’ continuous usage of electrical vehicles (EVs) and reduce the weight of the energy storage devices, wireless charging technology has been widely studied, updated, and commercialized in recent decades, regarding to its distinct superiority of great convenience and low risk. A higher coupling coefficient is the key factor that impacts the transmission efficiency, thus in most medium-power (hundreds of watts) to high-power (several kilowatts) wireless charging systems, ferrites are used to guide the magnetic flux and intensify the magnetic density. However, the weight of the ferrite itself puts an extra burden on the system, and the core loss during operation also reduces the total efficiency and output power. This paper proposes an optimized design algorithm based on a core-less method for the magnetic core, where the core loss and the coupling coefficient are consequently balanced, and the overall weight and efficiency of the system can be optimized. The iteration procedure is applied on the basis of removed ferrite length and thickness in the algorithm. In the simulation, a square coupler with a total volume of 300 mm × 150 mm, a circular coupler of 150 mm × 150 mm and a Double-D (DD) coupler of 300 mm × 150 mm are used to verify the advantages of the proposed method. The optimized ferrite structures are specific for each coupler shape, and the improvement is proved to be universal in current scale by means of 3-D finite element analysis.

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.

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