Demonstrating Dynamic Wireless Charging of an Electric Vehicle: The Benefit of Electrochemical Capacitor Smoothing

Miller, John M.; Onar, Omer C.; White, Cliff; Campbell, Steven; Coomer, Chester; Seiber, Larry E.; Sepe, R.B.; Steyerl, Anton

doi:10.1109/mpel.2014.2300978

Cited by 225 publications

(91 citation statements)

References 35 publications

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“…They have implemented an OLEV project, which was capable of transmitting 100 kW of power with 85% efficiency [2,3]. Moreover, the research team of Oak Ridge National Laboratory (ORNL) [38] has proven that the power transfer efficiency of DWPT system depends mainly on the position of the transmitter coil with respect to the pick-up coil. Therefore, the ultimate goal of this research is to analyze the effect of transmitting and receiving coil positions on DWC system efficiency and examine variable coupling factors between the coils.…”

Section: Introductionmentioning

confidence: 99%

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

et al. 2018

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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 Dynamic Wireless 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.

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Section: Introductionmentioning

confidence: 99%

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

et al. 2018

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“…Korea Advanced Technology Institute developed a set of dynamic wireless charging technology called On-Line Electric vehicles [12] . American Oak Ridge National Laboratory developed a prototype to achieve static and dynamic charging, with the overall efficiency of 90% [13] . WiTricity Company released its wireless charging prototype kit -WiT3300 [14] with the transmission power of 3.3 kW and efficiency of 90%.…”

Section: Literature Review Of Wireless Charging Technologymentioning

confidence: 99%

Research and Design of Wireless Charging System of Electric Vehicles

Lu¹,

Ding²,

Yuan³

et al. 2018

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The electric charging technology of electric vehicles has obtained increasingly extensive concerns by virtue of its potential powerful advantages. This paper respectively designs the software and hardware of the wireless charging system of electric vehicles, and then sets up the physical circuit and prototype to verify by the wireless charging experiment in the case of alignment and deviation of 15cm on the primary and secondary siding panel. The results show that the transmission power factor of the wireless system in the case of alignment and deviation is greater than 0.997, the highest efficiency from the power grid to the load is as high as 90%, and the wireless charging system operates stably.

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“…when the coils' reciprocal position is changing) is necessary as a way to reduce a) Correspondence to: Giorgio Lovison. E-mail: lovison.giorgio14 @ae.k.u-tokyo.ac.jp * The University of Tokyo, Graduate School of Frontier Sciences, Advanced Energy Department 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8561, Japan * * Toyodenki Seizo K.K., Engineering Research Division 3-8, Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan * * * The University of Tokyo, Graduate School of Engineering, Electrical Engineering and Information Systems Department 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan both battery weight and range anxiety (8) ; recently, some trial units are been experimented upon and achieved promising results (9)- (12) . The same concept can be applied as well to household appliances such as laptops and mobile phones.…”

Section: Introductionmentioning

confidence: 99%

Secondary-side-only Control for High Efficiency and Desired Power with Two Converters in Wireless Power Transfer Systems

et al. 2017

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In recent years, wireless power transfer has been a popular research topic because it allows both static and dynamic charging without using cables, thus easing the process for the user. However, achieving high efficiency and desired power corresponding to the load at any time is important. Communication between sides is often used, but sometimes its operation is not guaranteed because of harsh environmental conditions or malfunctioning. This paper addresses this problem by proposing a novel yet simple control strategy. It consists of simultaneous regulation of both power and efficiency by the secondary side alone, without communication with the primary side. When the primary side is not manipulated, the power is controlled by an AC/DC converter by using a two-mode control. On the other hand, the efficiency is controlled by a DC/DC converter by adjusting the DC link voltage to a reference value related to the maximum wireless transmitting efficiency. In this paper, the control concept as well as the design are provided. The proposed control shows a good trade-off by achieving power regulation capability at the cost of slight reduction in efficiency when compared to the currently existing state-of-the-art control.

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Demonstrating Dynamic Wireless Charging of an Electric Vehicle: The Benefit of Electrochemical Capacitor Smoothing

Cited by 225 publications

References 35 publications

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

Research and Design of Wireless Charging System of Electric Vehicles

Secondary-side-only Control for High Efficiency and Desired Power with Two Converters in Wireless Power Transfer Systems

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