An Overview of High Specific Power Electrical Machines and Drives Technologies for Electrified Aircraft

Zhao, Jiying; Zhang, Xiaolong; Swaminathan, Niraja; Haran, Kiruba S.

doi:10.1109/ecce50734.2022.9948102

Cited by 8 publications

(2 citation statements)

References 74 publications

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“…The use of high-temperature superconductors (HTS) in electrical machines has been identified as a potential technology to unlock the further electrification of transportation systems [1,2], specifically in aeronautical transportation [3][4][5][6][7]. Using HTS materials, such as bulks and tapes, fully [3] and partial [5] superconducting (SC) electric machines are being designed * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Alternative analytical models for HTS tapes considering their AC hysteretic and resistive losses

Fernandes,

Bucho,

Ferreira da Silva

et al. 2024

Supercond. Sci. Technol.

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This work proposes two alternative analytical models to evaluate the ac losses of High-Temperature Superconducting (HTS) tapes during their hysteretic and resistive modes. These models intend to extend the application range of state-of-the-art analytical models for current values higher than the critical one, i.e., for the resistive state, and to correctly predict the ac losses during the transition between the hysteretic and resistive modes. Two analytical models are proposed, one considering an extension of the Norris model for the HTS tape’s resistive mode and the other based on a Sigmoid function to characterize the hysteretic losses and their smooth transition to the resistive mode. Analytical models capable of estimating ac losses of superconducting (SC) tapes are an important tool for the design of complex SC systems, such as SC fault current limiters, SC electrical machines and SC cables. The proposed models are validated experimentally, for a 1st generation BSCCO tape and a 2nd generation ReBCO tape. Finite element simulation is also carried out to verify the accuracy of the proposed models. Results show that the proposed Extended-Norris model presents some deviation at the transition between the hysteretic and resistive modes, while the Sigmoid model presents very accurate results for the whole spectrum of applied current. Also, the parameters of the Sigmoid models are independent of the tape geometry.

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Section: Introductionmentioning

confidence: 99%

Alternative analytical models for HTS tapes considering their AC hysteretic and resistive losses

Fernandes,

Bucho,

Ferreira da Silva

et al. 2024

Supercond. Sci. Technol.

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show abstract

“…Even though the thermal performance is improved by using these novel structures for the air-cooled machines, it still cannot meet the power density requirement for some applications. To further improve the cooling performance, the more efficient water cooling methods can be used [19]. Chen et al applied a water jacket in contact with the inner ring of the winding [13] while Zhang et al arranged some water pipes at the outer ring of the winding [14].…”

mentioning

confidence: 99%

Additively Manufactured Winding Design for Thermal Improvement of an Oil-Cooled Axial Flux Permanent Magnet Machine

Tan

Fan

et al. 2024

IEEE Trans. Transp. Electrific.

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This article proposes a new additively manufactured winding with integrated heat sinks to improve thermal performance of an oil-cooled yokeless and segmented armature (YASA) axial flux permanent magnet machines. The heat sinks featuring pin-fin structure are integrated to the two sides and top of the winding to increase the heat transfer area and convective heat transfer coefficient, thus improving the thermal performance. Computational fluid dynamics is employed to evaluate the thermal performance of the proposed winding, which is further compared with that of the state-of-the-art rectangular winding. Besides, the influence of pin spacing in streamwise direction, tilt angle, flow rate and resistances on the thermal performance and pressure drops of the proposed winding are investigated. Finally, prototypes of the proposed winding and the counterpart rectangular winding are manufactured to verify the numerical analyses. The experimental results show that the winding temperature of the proposed winding can be reduced by 27.6 ℃ compared with that of rectangular winding. Index Terms-Additive manufacturing, cooling design, oil cooling, yokeless and segmented armature axial flux permanent magnet machines. I. INTRODUCTIONLECTRIFICATION is a main enabler for decarbonised transportation. To achieve the "Net Zero" target in future decades [1], ambitious roadmaps have been drawn up globally, which translate into step-change performance requirements for electrical machines in terms of their power density level, from 8 kW/L to 30kW/L [2-3]. The power density of state-of-the-art machines is primarily limited

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Investigation of Motor Winding Overvoltages in Integrated WBG-Based Motor Drive Systems

Azadeh,

Mirza,

Luo

2024

2024 IEEE Applied Power Electronics Conference and Exposition (APEC)

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An Overview of High Specific Power Electrical Machines and Drives Technologies for Electrified Aircraft

Cited by 8 publications

References 74 publications

Alternative analytical models for HTS tapes considering their AC hysteretic and resistive losses

Alternative analytical models for HTS tapes considering their AC hysteretic and resistive losses

Additively Manufactured Winding Design for Thermal Improvement of an Oil-Cooled Axial Flux Permanent Magnet Machine

Investigation of Motor Winding Overvoltages in Integrated WBG-Based Motor Drive Systems

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