High temperature superconducting rotating electrical machines: An overview

Chow, Calvin C. T.; Ainslie, Mark; Chau, K. T.

doi:10.1016/j.egyr.2022.11.173

Cited by 34 publications

(11 citation statements)

References 228 publications

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“…Due to the zero resistance properties of superconducting wires, superconducting windings can achieve much higher current density than conventional copper windings, which greatly improves the motor's electromagnetic load and reduces motor size. According to the integration location of superconducting materials, SEM can be divided into partial SEMs using superconducting coils in only field windings or armature windings, and full SEMs with superconducting wires in both windings, of which the latter can achieve higher thermal load and specific power [44,45].…”

Section: Superconducting Materialsmentioning

confidence: 99%

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

Zhao,

Li,

Zhang

et al. 2024

Machines

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The demand for high-power density motors has been increasing due to their remarkable output capability and compact construction. To achieve a significant improvement in motor power density, lightweight design methods have been recognized as an effective enabler. Therefore, extensive investigations have been conducted to reduce motor mass and achieve lightweight configurations through the exploration of lightweight materials, structures and manufacturing techniques. This article provides a comprehensive review and summary of state-of-the-art lightweight implementation methods for electrical machines, including the utilization of lightweight materials, structural lightweight design, and incorporation of advanced manufacturing technologies, such as additive manufacturing techniques. The advantages and limitations of each approach are also discussed in this paper. Furthermore, some comments and forecasts on potential future methodologies for motor lightweighting are also provided.

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Section: Superconducting Materialsmentioning

confidence: 99%

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

Zhao,

Li,

Zhang

et al. 2024

Machines

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“…High-temperature superconducting (HTS) pinning maglev holds promising potential as a future direction for pinning center within the SC can trapped flux lines above the PMG, providing self-stabilization. In addition to applications in maglev trains, the YBCO SC is also used in HTS bearings [2], HTS motors [3], and HTS flux pumps [4].…”

Section: Introductionmentioning

confidence: 99%

Thermal-vibration correlation study for high-temperature superconducting maglev intelligent monitoring based on back propagation neural network analysis

Pang,

Zheng,

Zhao

et al. 2024

Supercond. Sci. Technol.

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The internal temperature rise inside the high-temperature superconducting (HTS) superconductor resulting from irregular magnetic field (MF) above the permanent magnet guideway (PMG) is a major factor contributing to the decline of levitation performance. Real-time monitoring of the temperature rise inside YBCO superconductor is an important issue for the safe operation of the maglev train systems. However, the existing temperature rise testing method involves destructive intrusion less or more, easily affected by strong MF, occupying limited space and sensors prone to detachment. This paper innovatively proposes a non-contact internal temperature rise testing method combining artificial intelligence (AI) methods. Vibration is common signal of a maglev train system, which inspires to establish a fundamental thermal-dynamic levitation force synchronous testing device for YBCO superconductor. Then, a set of temperature rise-vibration dataset exposed to different alternating MF frequencies is created. The wavelet transform is chosen to extract the frequency band energy of vibration, and the backpropagation neural network is used to identify the corresponding temperature rise. The recognition accuracy can reach over 99.9%, which firstly proves the effectiveness of AI algorithms in the thermal-vibration correlation analysis for the HTS maglev system. The results can provide the foundation reference for the intelligent monitoring and fault diagnosis of thermal-dynamics stabilities of HTS maglev train in the future.

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“…there is no other conductor capable of generating the high or ultra-high magnetic fields that HTS conductors can (B > 30 T) [4]. In other cases, HTS conductors lead to very appealing performances but they must compete with other non-superconducting materials to generate competitive devices (cables, motors, etc) [5,6]. In both cases a figure of merit determines how fast will be the penetration degree of HTS conductors into the market, i.e.…”

Section: Introduction and Scopementioning

confidence: 99%

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

Obradors,

Puig,

Ricart

et al. 2024

Supercond. Sci. Technol.

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In this work, we review recent progress achieved in the use of Chemical Solution Deposition (CSD) based on fluorinated metalorganic precursors to grow superconducting REBCO films and CCs. We examine, first of all, the advances in optimizing the steps related to the solutions preparation, deposition and pyrolysis based on novel low-fluorine metalorganic solutions. We show that a new type of multifunctional colloidal solutions including preformed nanoparticles, can be used to introduce artificial pinning centers (APCs). We analyze how to disentangle the complex physico-chemical transformations occurring during the pyrolysis with the purpose of maximizing the film thicknesses. Understanding the nucleation and growth mechanisms is shown to be critical to achieve a fine tuning of the final microstructure, either using the spontaneous segregation or the colloidal solution approaches, and make industrially scalable this process. Advanced nanostructural studies have deeply modified our understanding of the defect structure and its genealogy. It is remarkable the key role played by the high concentration of randomly distributed and oriented BaMO3 (M=Zr, Hf) nanoparticles which enhance the concentration of APCs, such as stacking faults and the associated partial dislocations.Correlating the defect structure with the critical current density Jc(H,T,) allows to reach a tight control of the vortex pinning properties and to devise a general scheme of the vortex pinning landscape in the whole H – T phase diagram. We also refer to the outstanding recent achievements in enhancing the vortex pinning strength by shifting the carrier concentration in REBCO films towards the overdoped state, where the pinning energy is maximum and so, record values of critical current densities are achieved. This confirms the performance competitiveness of nanocomposite CCs prepared through the CSD route. We conclude with a short summary of the progress in scaling the CC manufacturing using fluorinated solutions.

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High temperature superconducting rotating electrical machines: An overview

Cited by 34 publications

References 228 publications

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

Thermal-vibration correlation study for high-temperature superconducting maglev intelligent monitoring based on back propagation neural network analysis

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

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High temperature superconducting rotating electrical machines: An overview

Cited by 34 publications

References 228 publications

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

Thermal-vibration correlation study for high-temperature superconducting maglev intelligent monitoring based on back propagation neural network analysis

Progress in superconducting REBa2Cu3O7 (RE = rare earth) coated conductors derived from fluorinated solutions

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Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions