Design and Simulation of a Permanent-Magnet Electromagnetic Aircraft Launcher

Patterson, Dean; Monti, Antonello; Brice, Charles W.; Dougal, Roger A.; Pettus, R.O.; Dhulipala, Surya Chandan; Kovuri, D.; Bertoncelli, T.

doi:10.1109/tia.2005.844404

Cited by 67 publications

(34 citation statements)

References 11 publications

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“…where T e,max represents the maximum value of the average EM shear stress, and can be utilized to determine whether the LS-secondary meets the requirement on EM shear stress [17]. Then, the maximum normal stress σ max , maximum shear stress τ max , and maximum deflection k max on a single ladder, which are defined in structural analysis [18], can be expressed as:…”

Section: Numerical Analysis Of Characteristicsmentioning

confidence: 99%

“…The EM shear stress in Table 1 for each DLIM has been calculated via Equation (11). Since the DLIM usually operates with an EM shear stress of 70-100 kN/m 2 [17], the machines in Table 1 are considered practical.…”

Section: Numerical Analysis Of Vpp Em Propulsionmentioning

confidence: 99%

“…Thus, the EM shear stress becomes smaller than the theoretical counterpart, with a maximum relative error of 12%. Considering the above reasonable factors for error, the numerical calculation of EM shear stress can prove to be accurate enough to estimate whether the LS-secondary DLIM fits the permitted cooling condition listed in [17].…”

Section: F-testmentioning

confidence: 99%

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Variable Pole Pitch Electromagnetic Propulsion with Ladder-Slot-Secondary Double-Sided Linear Induction Motors

Yang

Liu

et al. 2017

Applied Sciences

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Abstract:In this paper, we propose a novel variable pole pitch (VPP) electromagnetic (EM) propulsion technique using a series of ladder-slot-secondary double-sided linear induction motors (LS-secondary DLIMs). An equivalent circuit is developed for the LS-secondary DLIM, which considers the distribution of the eddy current in the ladders and the end effect. This equivalent circuit forms the basis for the subsequent design, numerical analysis, and optimization. The primary purpose of the VPP EM propulsion system is to address several obstacles encountered in high-speed large-thrust applications of LIMs, such as power factor improvement, optimization considering supply frequency constraint and operating kinetics, etc. The equivalent circuit of the LS-secondary DLIM, i.e., the theoretical foundation of the VPP EM propulsion, has been validated via simulation and experimentation on a small-scale platform, which proves that the numerical analysis of the VPP EM propulsion is effective.

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Section: Numerical Analysis Of Characteristicsmentioning

confidence: 99%

Section: Numerical Analysis Of Vpp Em Propulsionmentioning

confidence: 99%

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Variable Pole Pitch Electromagnetic Propulsion with Ladder-Slot-Secondary Double-Sided Linear Induction Motors

Yang

Liu

et al. 2017

Applied Sciences

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“…The machine topologies mainly considered for EML are a double-sided linear induction motor (LIM) [1], a double-sided tubular induction motor [2], and a linear permanent magnet synchronous motor (LPMSM) [3]. In order to achieve the high thrust requirement for aircraft launch applications these machines need to operate with a high current density.…”

Section: Introductionmentioning

confidence: 99%

Thermal Design of Linear Induction and Synchronous Motors for Electromagnetic Launch of Civil Aircraft

Bertola

Cox

Wheeler

et al. 2017

IEEE Trans. Plasma Sci.

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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.uk This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. Abstract-The engine size of modern passenger transport aircraft is principally determined by take-off conditions, since initial acceleration requires maximum engine power. An electromagnetic launch (EML) system could provide some or all of the energy required at takeoff so that the aircraft engine power requirement and fuel consumption may be significantly reduced. So far, EML for aircraft has been adopted only for military applications to replace steam catapults on the deck of aircraft carriers. This paper will describe the potential application of EML to propel civil aircraft on the runways of modern airports. A comparison of synchronous and asynchronous electrical motor systems designed to launch an A320-200 sized aircraft is presented. The paper also describes a solution of the transient heat transfer problem applied to the conductive components of EML systems.

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“…This paper will describe the application of EML to propel civil aircraft on the runways of modern airports. The machine topologies mainly considered for EML are Linear Induction Motor (LIM) [6], and Permanent Magnet Linear Synchronous Motor (LPMSM) [7]. The design and the comparison of the two topologies to launch an A320 are presented.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic launch systems for civil aircraft assisted take-off

Bertola

Cox

Wheeler

et al. 2015

Archives of Electrical Engineering

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This paper considers the feasibility of different technologies for an electromagnetic launcher to assist civil aircraft take-off. This method is investigated to reduce the power required from the engines during initial acceleration. Assisted launch has the potential of reducing the required runway length, reducing noise near airports and improving overall aircraft efficiency through reducing engine thrust requirements. The research compares two possible linear motor topologies which may be efficaciously used for this application. The comparison is made on results from both analytical and finite element analysis (FEA).

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Design and Simulation of a Permanent-Magnet Electromagnetic Aircraft Launcher

Cited by 67 publications

References 11 publications

Variable Pole Pitch Electromagnetic Propulsion with Ladder-Slot-Secondary Double-Sided Linear Induction Motors

Variable Pole Pitch Electromagnetic Propulsion with Ladder-Slot-Secondary Double-Sided Linear Induction Motors

Thermal Design of Linear Induction and Synchronous Motors for Electromagnetic Launch of Civil Aircraft

Electromagnetic launch systems for civil aircraft assisted take-off

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