AC loss and contact resistance in REBCO CORC<sup>®</sup>, Roebel, and stacked tape cables

Yagotintsev, K. A.; Anvar, V.A.; Gao, Peng; Dhalle, M.; Haugan, Timothy J.; Laan, D C van der; Weiss, Jeremy; Hossain, Md. Shahriar A.; Nijhuis, A.

doi:10.1088/1361-6668/ab97ff

Cited by 42 publications

(28 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally speaking, similar to the ITER CICC, cabling pitch is analogous to wire axial twist, with shorter pitch reducing loop size, and AC loss. Optimally increased wire-to-wire contact resistance reduces loss while allowing required current sharing [30]. Higher resistivity superalloy reinforcement strips are also applied to the center plane of 2 high by N wide low loss cables to provide strengthening plus controllable and optimal resistance increases between the top and bottom layer wires in the cable.…”

Section: Hts Cablesmentioning

confidence: 99%

Low cost, simpler HTS cable conductors for fusion energy systems

Zhai

Otto

Zarnstorff

2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

The cost and complexity of large, high-field superconducting magnet modules and related subsystems comprise 30% to 60% of the fusion reactor core capital cost. The strategic plan for the U.S. burning plasma research, the Fusion Energy Sciences Committee Report (FESAC) “Power the Future: Fusion and Plasmas’', and 2021 NASEM report “Key Goals and Innovations needed for a U.S. Fusion Pilot Plant” recommends that the U.S. pursue innovative science and technology to enable construction of a Fusion Pilot Plant (FPP) that produces net electricity from fusion at reduced capital cost. To achieve this, a novel combination of lower-cost high temperature superconductors (HTS) in cable configurations with co-wound reinforcement for higher current density are being investigated using a simplified construction strategy to produce compact stable coils. They would be capable of generating 20 T at up to 10-20 K. Small-scale, inexpensive test coils and prototypes will help develop each feature and validate cabled conductor design models. The near term goal is to validate engineering approaches, scientific models and fabrication capabilities applicable to fusion reactor development such as U.S. fusion nuclear science facility (FNSF), sustained high-power density tokamak facility (SHPD) and FPP designs. The design options include lower-cost, high-strength, quench resistant REBCO or Bi-2212 cables in an all metal coil design that simplifies HTS coil construction and quench protection system, with co-wound reinforcements that integrate stress management in HTS cable design and provides thermal mass to help prevent quench damage.

show abstract

Section: Hts Cablesmentioning

confidence: 99%

Low cost, simpler HTS cable conductors for fusion energy systems

Zhai

Otto

Zarnstorff

2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Terzioglu et al have concluded that the copper tube former can contribute to the transport current loss and magnetization loss of CORC ® cables; thus, an optimized former material with high thermal conductivity and low electrical conductivity should be employed to reduce the AC loss [231]. Yagotintsev et al have compared the AC loss and inter-tape contact resistance of multiple cabling methods, including REBCO CORC ® , Roebel, and stacked tape cables [232]. It is found that the CORC ® cable has lower hysteresis loss in an alternating magnetic field perpendicular to the wide side of the REBCO layer, compared with Roebel cables and non-twisted conductors.…”

Section: Roebel Rutherford-type and Corc ® Cablesmentioning

confidence: 99%

Alternating Current Loss of Superconductors Applied to Superconducting Electrical Machines

Zhang¹,

Wen²,

Grilli

et al. 2021

Energies

View full text Add to dashboard Cite

Superconductor technology has recently attracted increasing attention in power-generation- and electrical-propulsion-related domains, as it provides a solution to the limited power density seen by the core component, electrical machines. Superconducting machines, characterized by both high power density and high efficiency, can effectively reduce the size and mass compared to conventional machine designs. This opens the way to large-scale purely electrical applications, e.g., all-electrical aircrafts. The alternating current (AC) loss of superconductors caused by time-varying transport currents or magnetic fields (or both) has impaired the efficiency and reliability of superconducting machines, bringing severe challenges to the cryogenic systems, too. Although much research has been conducted in terms of the qualitative and quantitative analysis of AC loss and its reduction methods, AC loss remains a crucial problem for the design of highly efficient superconducting machines, especially for those operating at high speeds for future aviation. Given that a critical review on the research advancement regarding the AC loss of superconductors has not been reported during the last dozen years, especially combined with electrical machines, this paper aims to clarify its research status and provide a useful reference for researchers working on superconducting machines. The adopted superconducting materials, analytical formulae, modelling methods, measurement approaches, as well as reduction techniques for AC loss of low-temperature superconductors (LTSs) and high-temperature superconductors (HTSs) in both low- and high-frequency fields have been systematically analyzed and summarized. Based on the authors’ previous research on the AC loss characteristics of HTS coated conductors (CCs), stacks, and coils at high frequencies, the challenges for the existing AC loss quantification methods have been elucidated, and multiple suggestions with respect to the AC loss reduction in superconducting machines have been put forward. This article systematically reviews the qualitative and quantitative analysis methods of AC loss as well as its reduction techniques in superconductors applied to electrical machines for the first time. It is believed to help deepen the understanding of AC loss and deliver a helpful guideline for the future development of superconducting machines and applied superconductivity.

show abstract

“…Losses due to varying magnetic fields and AC currents in HTS coils can be disruptive in their operating conditions, leading to quenching and loss of superconductivity. However, if liquid hydrogen is used for its cooling, the limits of magnetic fields and current densities are higher [56]. Additionally, there are more complex configurations of HTS tapes, such as stacks, Roebel [57], and CORC [58], which can prove useful in increasing the current transport and magnetic flux density creation [59,60].…”

Section: Axial-flux Partially Superconducting Machinementioning

confidence: 99%

Barriers and Challenges Going from Conventional to Cryogenic Superconducting Propulsion for Hybrid and All-Electric Aircrafts

2021

View full text Add to dashboard Cite

The development of electric aircraft is becoming an important technology for achieving the goals set by the European Commission for the reduction of gases emissions by 2050 in the aeronautical transportation system. However, there is a technology gap between the current values of specific power in commercial electric machines and those required for aeronautical applications. Therefore, the search for alternative materials and non-conventional designs is mandatory. One emergent solution is using superconducting machines and systems to overcome the current limits of conventional electrical machines. This work reviews the new hybrid and all-electric aircraft tendencies, complementing it with recent research on the design and development of high specific power superconducting machines. This includes the main topologies for hybrid and all-electric aircraft, with an overview of the ongoing worldwide projects of these aircraft types, systematizing the main characteristics of their propulsion systems. It also includes the research on superconducting machines to achieve high specific power and consider the impact on the redesign of aircraft systems, the electrical, cooling, and fuel source systems.

show abstract

AC loss and contact resistance in REBCO CORC^®, Roebel, and stacked tape cables

Cited by 42 publications

References 39 publications

Low cost, simpler HTS cable conductors for fusion energy systems

Low cost, simpler HTS cable conductors for fusion energy systems

Alternating Current Loss of Superconductors Applied to Superconducting Electrical Machines

Barriers and Challenges Going from Conventional to Cryogenic Superconducting Propulsion for Hybrid and All-Electric Aircrafts

Contact Info

Product

Resources

About

AC loss and contact resistance in REBCO CORC®, Roebel, and stacked tape cables

Cited by 42 publications

References 39 publications

Low cost, simpler HTS cable conductors for fusion energy systems

Low cost, simpler HTS cable conductors for fusion energy systems

Alternating Current Loss of Superconductors Applied to Superconducting Electrical Machines

Barriers and Challenges Going from Conventional to Cryogenic Superconducting Propulsion for Hybrid and All-Electric Aircrafts

Contact Info

Product

Resources

About

AC loss and contact resistance in REBCO CORC^®, Roebel, and stacked tape cables