Design and Implementation of Shaped Magnetic-Resonance-Based Wireless Power Transfer System for Roadway-Powered Moving Electric Vehicles

Shin, Jae–Heon; Shin, Seungyong; Kim, Yang-Su; Ahn, Seungyoung; Lee, Seok-Hwan; Jung, Guho; Jeon, Seong-Jeub; Cho, Dong-Ho

doi:10.1109/tie.2013.2258294

Cited by 730 publications

(241 citation statements)

References 26 publications

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“…The Korea Advanced Institute of Science and Technology (KAIST) first commercialized a dynamic charging electric vehicle system called the On-Line Electric Vehicle (OLEV) system. The key technology underlying OLEV is a shaped magnetic field in resonance (SMFIR), which effectively magnifies electric waves, so that charging efficiencies of up to 80% have been achieved [5,10,11]. The first commercially implemented version of OLEV is the trolley in Seoul Grand Park, one of the largest theme parks in South Korea [12].…”

Section: Batterymentioning

confidence: 99%

Location Planning for Dynamic Wireless Charging Systems for Electric Airport Passenger Buses

et al. 2018

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Abstract:The majority of the ground vehicles operating on the airside parts of commercial airports are currently powered by diesel engines. These include vehicles such as apron buses, fuel trucks, and aircraft tractors. Hence, these vehicles contribute to the overall CO 2 emissions of the aviation transport system and thus negatively influence its environmental footprint. To reduce this damaging environmental impact, these vehicles could potentially be electrified with on-board batteries as their energy sources. However, the conductive charging of such vehicles via stationary cable connections is rather time-consuming. A dynamic wireless charging system to supply public transportation passenger buses with electric energy while in motion has recently been installed on the Korea Advanced Institute of Science and Technology (KAIST) campus and in the Korean city of Gumi. In this paper, we study configuration problems related to the use of this technology to make airport operations more environmentally sustainable. We concentrate on the power supply for apron buses and analyze the location planning problems related to the distribution of the required power supply and the wireless charging units in the apron road system. To this end, we develop a formal optimization model and discuss the first numerical results.

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Section: Batterymentioning

confidence: 99%

Location Planning for Dynamic Wireless Charging Systems for Electric Airport Passenger Buses

et al. 2018

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“…Additionally, the conventional charging method used by wires is also a risky and painstaking operation for users who own electric vehicles. Wireless power transfer (WPT) is an emerging technology that has been a hot area of research [4][5][6][7][8][9] in recent years due to its safety and convenience when compared with plug-in charging or fuel cell systems for electric vehicles. WPT produces no contaminants and is completely reliable and maintenance-free unlike conventional plug-in or brush and bar contact-based methods.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Planar Spiral Coils between Two Multilayer Media for Electric Vehicle Wireless Charging

Luo

Wei

2018

Energies

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Square and circular coils are two typical topologies for coupling coils and are applied to wireless charging. However, most of the research on coupling coils is based on the finite element model (FEM), which is a time-consuming process for 3-D structure coils. In this paper, on the basis of Fourier-Bessel transformation and Dual Fourier transformation, two theoretical models of square and circular coils between two multilayer media are proposed. With the proposed models, we consider several important parameters such as the size of the coils, thickness, and permeability of each layer. Thus, both the self-inductance and mutual inductance of two planar coils can be calculated without much computational time. Additionally, these theoretical models can help designers figure out the different trends of self-inductance and mutual inductance, which has plenty of benefits for the preliminary pad design. Lastly, a prototype with a size of 600 mm × 600 mm and a 200 mm air gap was built in order to verify the proposed models.

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“…The wireless power transfer (WPT) technique by magnetic coupling coils has been applied in many fields, such as portable electronic devices [1][2][3][4], electric vehicles [5][6][7], and implanted medical devices [8][9][10][11]. For mid-range air gap between transmitting and receiving coil (the distance between two coils is usually less than eight times the diameter of the coil), the power transfer efficiency is vitally important and must be given priority in applications of high-power or continuous-operation electric devices such as power supply for household appliance, vehicle charging and microwave power transmission.…”

Section: Introductionmentioning

confidence: 99%

New Insight of Maximum Transferred Power by Matching Capacitance of a Wireless Power Transfer System

et al. 2017

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Most research on wireless power transfer (WPT) has been focused on how to achieve a high-efficiency power transfer. Our study found that under the impedance matching for achieving maximum WPT efficiency, the power transferred to the load cannot reach the maximum when a WPT system is supplied by an AC voltage source with constant amplitude. However, the load power or the voltage across the load is essential for a low-power electric device such as the implanted medical device where the transfer efficiency is not the priority to be considered. The paper presents a method for achieving maximum power on the load by matching capacitance in a WPT system with given two-coupled-coils. Three sets of matching capacitances for extreme load power were deduced based on the circuit model considering the coil's resistance, and all these three matching make the WPT system operate at the resonant state. Two sets can make the system achieve the global maximum of load power. One set can make the system achieve the local maximum of load power and reach the power transfer efficiency next to 1. Experimental results verified the theoretical calculations. The results can contribute to the compensation design of a practical WPT system for transferring the maximum power to the load.

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Design and Implementation of Shaped Magnetic-Resonance-Based Wireless Power Transfer System for Roadway-Powered Moving Electric Vehicles

Cited by 730 publications

References 26 publications

Location Planning for Dynamic Wireless Charging Systems for Electric Airport Passenger Buses

Location Planning for Dynamic Wireless Charging Systems for Electric Airport Passenger Buses

Theoretical Analysis of Planar Spiral Coils between Two Multilayer Media for Electric Vehicle Wireless Charging

New Insight of Maximum Transferred Power by Matching Capacitance of a Wireless Power Transfer System

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