Advanced Induction Motor Endring Design Features for High Speed Applications

Caprio, M.T.; Lelos, V.; Herbst, J.D.; Upshaw, J.

doi:10.1109/iemdc.2005.195843

Cited by 23 publications

(15 citation statements)

References 12 publications

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“…In comparison to reluctance machines, IMs have a higher power factor making the machine suitable for high-speed operation. The critical aspects of the machine design include the mechanical stress of the cage, especially for its end-rings, and the thermal evaluation as a result of the conducting rotor parts [15]. Different rotor designs have been developed and compared, but for high power applications with restricted installation space and the low weight requirement, laminated and caged rotors are most feasible [16].…”

Section: Induction Machinesmentioning

confidence: 99%

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Challenges and Opportunities of Very Light High-Performance Electric Drives for Aviation

et al. 2018

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Abstract:The demand for alternative fueling methods to reduce the need for fossil fuels is not limited to the electrification of ground vehicles. More-electric and all-electric aircraft pose challenges, with extensive requirements in terms of power density, efficiency, safety, and environmental sustainability. This paper focuses on electrical machines and their components, especially for high-power applications like the main propulsion. The electrical machine is evaluated from different aspects, followed by a closer look at the components and materials to determine the suitability of the current standard materials and advanced technologies. Furthermore, the mechanical and thermal aspects are reviewed, including new and innovative concepts for the cooling of windings and for the use of additive manufacturing. Aircraft have special demands regarding weight and installation space. Following recent developments and looking ahead to the future, the need and the possibilities for light and efficient electrical machines are addressed. All of the approaches and developments presented lead to a better understanding of the challenges to be expected and highlight the upcoming opportunities in electrical machine design for the use of electric motors and generators in future aircraft. Several prototypes of electrical machines for smaller aircraft already exist, such as the electric drive of the Siemens powered Extra 330LE. The focus of this paper is to provide an overview of current technical possibilities and technical interrelations of high performance electric drives for aviation. A 1 MW drive is exemplified to present the possibilities for future drives for airplanes carrying a larger number of passengers. All presented techniques can also be applied to other drive power classes.

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Section: Induction Machinesmentioning

confidence: 99%

“…Caprio et al [15] presented a 2 MW high-speed flywheel machine that operates at 15,000 rpm with an Esson's number of 2.6 kW·min/m 3 . The challenge of the high rotational speed lies in the mechanical design of the rotor.…”

Section: Induction Machinesmentioning

confidence: 99%

Challenges and Opportunities of Very Light High-Performance Electric Drives for Aviation

et al. 2018

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“…not electrical steel grades). In [36], [37], analysis is presented of the advanced end-ring design features for a 2MW, 15000rpm machine, shown in Fig.18, including a non uniform cross section, hoop stress relief cuts, and an integrated joint boss, which reduces critical stress concentrations, allowing operation under a broad speed and temperature design range. For the rotor laminations, high strength aircraft-grade AISI 4130 alloy steel is mentioned [37].…”

Section: A High Speed Induction Machinesmentioning

confidence: 99%

“…18. 2MW 15,000 rpm laminated IM rotor [36] Highest peripheral speeds for laminated rotor Induction Machines are obtained by using advanced end-ring design features as well as using high strength sheet steel, which is magnetic for the rotor (i.e. not electrical steel grades).…”

Section: A High Speed Induction Machinesmentioning

confidence: 99%

High-Speed Electrical Machines: Technologies, Trends, and Developments

Gerada

Mebarki

Brown

et al. 2014

IEEE Trans. Ind. Electron.

782

256

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.ukAbstract-This paper reviews the current technologies used in high speed electrical machines, through an extensive survey of different topologies developed and built in industry as well as in academia for several applications. Developments in materials and components including electrical steels and copper alloys are discussed, and their impact on the machines' operating physical boundaries is investigated. The main application areas pulling the development of high speed machines are also reviewed in an effort to better understand the typical performance requirements.Index Terms-high speed electrical machines, high frequency electrical machines, high strength electrical steels, high frequency electrical steels, copper alloys, thermal modeling, mechanical modeling.

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“…This work addresses an intermediate between the two extremes studied in the earlier paper. This intermediate region is of growing importance as variable speed generators, such as those connected to flywheels [2][3][4] or directly to gas turbines, become more important.…”

Section: Introductionmentioning

confidence: 99%

Higher frequency performance of stress-grading systems for HV large rotating machines

Hebner

El-Kishky

Abdelsalam

et al. 2006

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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This paper presents the results of numerical simulation and analysis of the characteristics of stress-grading systems of high voltage rotating machines against frequency. The stress-grading systems are optimally designed to minimize the local electric field enhancement at a discrete number of frequencies. The performance characteristics of each system are then generated and studied within a given frequency range. The potential distribution characteristics as well as the local electric stress, surface resistance, and the power dissipation characteristics are generated and studied against frequency.

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Advanced Induction Motor Endring Design Features for High Speed Applications

Cited by 23 publications

References 12 publications

Challenges and Opportunities of Very Light High-Performance Electric Drives for Aviation

Challenges and Opportunities of Very Light High-Performance Electric Drives for Aviation

High-Speed Electrical Machines: Technologies, Trends, and Developments

Higher frequency performance of stress-grading systems for HV large rotating machines

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