High-Temperature Superconducting Capacitor and Its Application to a Superconducting Wireless Power Transfer System

He, Yingda; Wang, Yu; Nie, Xinyi; Chen, Weirong; Yan, Zhongming

doi:10.1109/tasc.2018.2858785

Cited by 8 publications

(6 citation statements)

References 13 publications

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“…But HTS is not as prevalent in WPT. In addition, HTS capacitors for WPT are proposed [117]. HTS provides virtually no resistance and high current densities in critical state.…”

mentioning

confidence: 99%

A critical review on wireless charging for electric vehicles

Machura

2019

Renewable and Sustainable Energy Reviews

204

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Electric vehicles (EVs) have recently been significantly developed in terms of both performance and 10 drive range. There already are various models commercially available, and the number of EVs on road 11 increases rapidly. Although most existing EVs are charged by electric cables, companies like Tesla, 12 BMW and Nissan have started to develop wireless charged EVs that don't require bulky cables. 13 Rather than physical cable connection, the wireless (inductive) link effectively avoids sparking over 14 plugging/unplugging. Furthermore, wireless charging opens new possibilities for dynamic chargingcharging while driving. Once realised, EVs will no longer be limited by their electric drive range and the requirement for battery capacity will be greatly reduced. This has been prioritised and promoted worldwide, particularly in UK, Germany and Korea. This paper presents a thorough literature review on the wireless charging technology for EVs. The key technical components of wireless charging are summarised and compared, such as compensation topologies, coil design and communication. To enhance the charging power, an innovative approach towards the use of superconducting material in coil designs is investigated and their potential impact on wireless charging is discussed. In addition, health and safety concerns about wireless charging are addressed, as well as their relevant standards. Economically, the costs of a wide range of wireless charging systems has also been summarised and compared.

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“…But HTS is not as prevalent in WPT. In addition, HTS capacitors for WPT are proposed [117]. HTS provides virtually no resistance and high current densities in critical state.…”

mentioning

confidence: 99%

A critical review on wireless charging for electric vehicles

Machura

2019

Renewable and Sustainable Energy Reviews

204

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“…Due to the low loss and large critical current density properties of high-temperature superconducting (HTS) materials, superconducting WPT systems with HTS coils have been found to be more efficient and have been considered as a potential charging tool for electric vehicles [14][15][16]. By introducing high-Q HTS electrode capacitors to form superconducting LC-resonators (consisting of an inductance and a capacitor), those systems can be improved further [17][18][19]. However, the superconducting resonators reported so far have no frequency-tuning functionality because of the fixed capacitance of developed capacitors.…”

Section: Introductionmentioning

confidence: 99%

A tunable superconducting LC-resonator with a variable superconducting electrode capacitor bank for application in wireless power transfer

He¹,

Wang²,

Yan³

2019

Supercond. Sci. Technol.

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The frequency alignment of resonators is essential for wireless power transfer (WPT) systems to achieve strongly coupled magnetic resonances. Here, we present a novel tunable superconducting resonator for WPT applications. The tunable resonator is composed of a high-temperature superconducting (HTS) coil and a variable HTS electrode capacitor bank based on two series YBa2C3O7−x–SrTiO3–YBa2C3O7−x thin films. The HTS coil serves as a wireless transmitting tool for power delivery, while the HTS electrode capacitor bank provides a frequency-tuning element for the resonator. At 77 K, the HTS materials cause low loss and thus achieve a high quality factor, while the incipient ferroelectric SrTiO3 substrate with HTS electrodes has a nonlinear capacitance dependence on the applied electric field with no hysteresis. A voltage supply applies a continuous DC bias to both capacitors synchronously via the coil, adjusting the total capacitance and thus the resonant frequency. Our results indicate that the tunable resonator can achieve a tuning range of 12% from 775 kHz, offering a frequency-tuning functionality to superconducting WPT technology.

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“…Only one coil sub‐system is used in the conventional WPT charging method. Some methods like dynamic WPT systems, notably the smartphone chargers shown here, use power supply rails, a single transmitting coil may provide several reception coils 198–204 . All of the sections having only one insulated copper coil are alternated with an HTS superconducting coil in multiple coil subsystems 205 .…”

Section: Coil Designmentioning

confidence: 99%

“…Some methods like dynamic WPT systems, notably the smartphone chargers shown here, use power supply rails, a single transmitting coil may provide several reception coils. [198][199][200][201][202][203][204] All of the sections having only one insulated copper coil are alternated with an HTS superconducting coil in multiple coil subsystems. 205 Kim et al supplied a performance of the system that included four coils, two of which were HTS.…”

Section: Height Of the Flux Path Tolerancementioning

confidence: 99%

A critical review on inductive wireless power transfer charging system in electric vehicle

Geetha

Usha

2022

Energy Storage

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Considering a prospect where a driverless electric vehicle (EV) requires an automatic charging system that does not need a person to do anything. In this case, there is a need for a fully automated, fast, safe, cost‐effective, and reliable charging infrastructure that can be used for EVs and other EVs. This infrastructure must also be profitable and allow for quick adoption in electric transportation systems. Wireless charging methods may allow you to understand these characteristics. Wireless power transfer (WPT) is a future technology that offers flexibility, convenience, safety, and the capacity to be automated. Due to its high efficiency and ease of maintenance, resonant inductive wireless charging should get more attention in WPT techniques than other WPT methods. This literature provides an overview of the status of Resonant Inductive Wireless Power Transfer Charging technology, as well as a look at the current and prospects of the wireless EV industry. First, the article provides a brief history of wireless charging technologies, outlining the benefits and drawbacks. Then, the research assists in a comparative analysis of various types of WPT methodologies, control strategies, and compensation networks that have been done so far. The static and dynamic charging procedures, as well as their features, are shown. To increase charging power, a novel approach to the usage of superconducting materials in coil designs is examined, and their potential influence on wireless charging is highlighted. The detailed role and importance of power electronics, as well as the many types of converters utilized in diverse applications, are highlighted. The batteries and their management systems, as well as numerous WPT difficulties, are also discussed. Different trades are investigated, including cyber security economic consequences, health and safety, foreign object identification, and the effect and influence on the distribution grid. This article also highlights the opportunities and challenges associated with wireless charging systems. We anticipate that our effort will contribute to the advancement of WPT system research and development.

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High-Temperature Superconducting Capacitor and Its Application to a Superconducting Wireless Power Transfer System

Cited by 8 publications

References 13 publications

A critical review on wireless charging for electric vehicles

A critical review on wireless charging for electric vehicles

A tunable superconducting LC-resonator with a variable superconducting electrode capacitor bank for application in wireless power transfer

A critical review on inductive wireless power transfer charging system in electric vehicle

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