Analysis of -Parameters in Magnetic Resonance WPT Using Superconducting Coils

Jeong, In-Sung; Jung, Byung-Ik; You, Don-Sang; Choi, Hyo-Sang

doi:10.1109/tasc.2016.2544139

Cited by 28 publications

(15 citation statements)

References 6 publications

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“…Recently, in order to improve the efficiency of the system, the technical fusion using high‐temperature superconducting (HTS) resonance coils in the WPT system was proposed since the superconducting wire has prominent advantages such as larger current density and higher Q ‐value than the normal conducting wire and it can improve the efficiency by 20%. This method provided a new way of supplying power to maglevs.…”

Section: Wpt For Maglev Vehiclesmentioning

confidence: 99%

Review and research progress of wireless power transfer for railway transportation

Wang

2018

IEEJ Transactions Elec Engng

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This paper discusses the history and research progress of wireless power transfer (WPT) for railway transportation. In the field of railway transportation traction power supply, the problems caused by the traditional contact‐type power supply method have become increasingly prominent: the overhead contact network prone to breakages, scraping and wearing the pantograph, etc. WPT technology, which avoids direct contact with the power supply sources and loads, effectively solves these problems. This paper focuses on the application of WPT technology for railway transit, and introduces the research status in China and abroad. Moreover, the main technologies and primary problems of WPT, including magnetic coupler, segmented power supply, design of high‐frequency inverter, system optimization and control and practical applications for trams, maglev vehicles, and high‐speed trains, are reviewed. A detailed analysis and summary on the technologies is also provided. By reviewing the state‐of‐the‐art development of WPT in railways, it is hoped that researchers could be encouraged by these achievements and pushed forward the further development in WPT. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Wpt For Maglev Vehiclesmentioning

confidence: 99%

Review and research progress of wireless power transfer for railway transportation

Wang

2018

IEEJ Transactions Elec Engng

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“…In contrast to Zhong's strategy, a WPT system which was designed using superconducting coils to boost wireless power transmission efficiency offered higher transmission efficiency at a longer distance [20]. However, this method is not practical because of the high economic cost and difficulty in realizing the superconducting coils [21]. Please note that WPT's resonant frequency is still very high via current power converter technology.…”

Section: Introductionmentioning

confidence: 99%

A Fractional-Order Element (FOE)-Based Approach to Wireless Power Transmission for Frequency Reduction and Output Power Quality Improvement

Zhang

2019

Electronics

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A wireless power transmission (WPT) requires high switching frequency to achieve energy transmission; however, existing switching devices cannot satisfy the requirements of high-frequency switching, and the efficiency of current WPT is too low. Compared with the traditional power inductors and capacitors, fractional-order elements (FOEs) in WPT can realize necessary functions though requiring a lower switching frequency, which leads to a more favorable high-frequency switching performance with a higher efficiency. In this study, a generalized fractional-order WPT (FO-WPT) is established, followed by a comprehensive analysis on its WPT performance and power efficiency. Through extensive simulations of typical FO wireless power domino-resonators (FO-WPDRS), the functionality of the proposed FO-WPT for medium and long-range WPT is demonstrated. The numerical results show that the proposed FOE-based WPT solution has a higher power efficiency and lower switching frequency than conventional methods.

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“…If a surface finish is necessary for a particular RF/microwave circuit design, several issues should be considered because it can impact insertion loss, impedance, and radiation loss. Unfortunately, few papers have been concerned about conducting coated media [16,17], but they are limited for only wire coils.…”

Section: Introductionmentioning

confidence: 99%

Effect of Losses in Printed Rectangular Coils for Compact Wireless Power Transfer Systems

Chaimool¹,

Rakluea²,

Akkaraekthalin³

et al. 2019

PIER C

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Development and optimization of printed spiral coils have significant impacts on the power transfer efficiency (PTE) and operating range for magnetic resonant wireless power transfer (WPT) applications. In this paper, the effects of different material losses (substrate and conducting coating) of printed coils are considered and experimentally studied. For the purposes of comparison and finding the dominating losses, lossy loaded capacitors with equivalent series resistances have also been investigated. A four-coil system with an external capacitor-loaded (ECL) magnetic resonant WPT system is considered, and a self-resonant coil is designed and compared. Results show that the ECL resonant coil has higher PTE than the self-resonant coil with the same size and distance between the transmitting and receiving coils. Through observing the simulated results and analyzing experimental data, it can be concluded that the dominant cause of the decrease in PTE of this ECL-WPT system is the strip resistive loss of coil of 57% (0.891 dB) and the ohmic loss in ECL of 37% (0.568 dB). Meanwhile, the substrate loss significantly impacts on the PTE of the self resonant coil. The overall measured PTE is about 66% of the ECL coil at a distance of 50 mm when the above loss factors are considered. The measured results are in good agreement with the analysis and simulations.

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Analysis of -Parameters in Magnetic Resonance WPT Using Superconducting Coils

Cited by 28 publications

References 6 publications

Review and research progress of wireless power transfer for railway transportation

Review and research progress of wireless power transfer for railway transportation

A Fractional-Order Element (FOE)-Based Approach to Wireless Power Transmission for Frequency Reduction and Output Power Quality Improvement

Effect of Losses in Printed Rectangular Coils for Compact Wireless Power Transfer Systems

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