Design and Manufacturing of a Multistage Cooled Current Lead for Superconducting High Current DC Busbars in Industrial Applications

Gutheil, Bernd; Noë, M.; Reiser, Wolfgang; Huwer, Stefan; Hanebeck, Claus; Räch, Carsten; Röhrenbeck, Marcus; Schreiner, Fabian

doi:10.1109/tasc.2017.2655108

Cited by 10 publications

(3 citation statements)

References 16 publications

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“…A major issue encountered in HTS applications, especially large-scale industrial ones, is the leakage heat through current leads [12,13]. The HTS capacitor has the potential to serve as a fundamental element to form an all-superconducting system or circuit with other HTS devices.…”

Section: Introductionmentioning

confidence: 99%

Superconducting electrode capacitor based on double-sided YBCO thin film for wireless power transfer applications

Wang

et al. 2018

Supercond. Sci. Technol.

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A high-temperature superconducting (HTS) electrode capacitor (HTS capacitor) has been reported for the first time in the form of a superconductor–insulator–superconductor structure. Double-sided HTS thin film might be inherently suitable for the raw material choice of an HTS capacitor. In terms of electrode material, HTS thin film has a much lower surface resistance than normal conductors, and, as a dielectric medium, its substrate generally has a larger dielectric constant but a smaller loss tangent than the dielectric layers of some conventional capacitors. Thus, it is possible to fabricate a high-quality capacitor based on double-sided HTS thin film. This type of HTS capacitor could play a role in wireless power transfer (WPT) technology, since the WPT efficiency depends on the quality factors of both the coil and capacitor. Numerous studies have been performed to optimize the WPT system with HTS coil. In contrast, we develop an HTS capacitor based on double-sided YBCO film for WPT applications and investigate its effect on the WPT system. It is found that the HTS capacitor can provide a high quality factor, enhance WPT efficiency, and work normally with an HTS coil at 77 K, avoiding the dilemma between an HTS coil and a normal capacitor.

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Section: Introductionmentioning

confidence: 99%

Superconducting electrode capacitor based on double-sided YBCO thin film for wireless power transfer applications

Wang

et al. 2018

Supercond. Sci. Technol.

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“…Busbars contains stacks of superconductors that should be insulated for the sake of electrical isolation as well as increased heat transfer. A busbar joint is an important component that connects different sections of busbar to other superconducting components 70 . Several busbars are connected to the feeder to communicate with each other.…”

Section: Ivd Superconducting Busbarmentioning

confidence: 99%

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Yazdani-Asrami

Seyyedbarzegar

Zhang

et al. 2022

IEEE Electr. Insul. Mag.

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Superconducting technology for aerospace application is enabled by emerging development around hydrogen cooled electrically powered aircraft, aiming at zero-emission aviation. Superconductors, typically in the form of tape or wire in a composite architecture, can not only carry current density which is over 100 times that of copper and aluminium, but are also characterized by much lower losses. This property of superconductors makes them good candidates for the fabrication of superconducting devices of high specific power density, i.e. lower size and lighter weight, which is critical for aerospace applications. Superconductors, like any other conductors, require standard insulation to function safely and reliably in the electrical apparatus of aircraft, especially due to the special architecture, operating temperature, and operating condition of superconducting apparatus at high altitude. Extra attention should be drawn to choose proper insulating materials for such applications. In this paper, the challenges and considerations for choosing insulating materials for superconducting devices in cryo-electrified aircraft are reviewed and discussed.

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“…Recently, a multi-stage cooled current lead for industrial high DC applications was developed and tested [4].…”

Section: Introductionmentioning

confidence: 99%

Current Redistribution in a Superconducting Multi-Strand 35 kA DC Cable Demonstrator

Wolf

Fietz

Heiduk

et al. 2021

IEEE Trans. Appl. Supercond.

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High temperature superconductors (HTS) are discussed as energy-efficient solutions for industrial high-current applications beyond 10 kA e.g. bus bar systems in industrial electrolysis plants. In this contribution, the experimental test of a 3.6-meterlong 35 kA DC demonstrator, made from twelve high-current HTS CrossConductor (HTS CroCo) strands in an liquid nitrogen bath at T = 77 K is presented. In this work, a common connector concept of the twelve HTS CroCo strands is proposed. Compared to earlier results without common connector, lead resistances were effectively reduced and current distribution among the individual strands was significantly facilitated. This is confirmed by the observation of increased critical cable current of 37.6 kA compared to 33 kA in previous work without low-resistive common connector. Additionally, the current range, in which all twelve strands reached their critical electric field, was found to be reduced from >7 kA to 2 kA. Results are discussed and assessed with the help of an electric circuit model, from which the solder resistances at the connections could be obtained by fitting.Particular focus was given to the investigation of current redistribution in the demonstrator. Therefore, a heater was installed on one HTS CroCo strand, and activated to raise the temperature on this strand and quench a single strand locally. It is observed that current is redistributed through the common connectors to the other strands.

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Design and Manufacturing of a Multistage Cooled Current Lead for Superconducting High Current DC Busbars in Industrial Applications

Cited by 10 publications

References 16 publications

Superconducting electrode capacitor based on double-sided YBCO thin film for wireless power transfer applications

Superconducting electrode capacitor based on double-sided YBCO thin film for wireless power transfer applications

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Current Redistribution in a Superconducting Multi-Strand 35 kA DC Cable Demonstrator

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