The science and technology of electric launch

Fair, H.D.

doi:10.1109/20.911783

Cited by 54 publications

(12 citation statements)

References 48 publications

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“…According to launching mechanism principles, electromagnetic launchers can be divided into three types: rail, coil and reconnection. 26 This paper focuses on the coil-type electromagnetic launch weft insertion system. It consists of a power supply, launching coil, coil rack, rail, clip weft device, sensor and switch.…”

Section: Principles Of Electromagnetic Launch Weft Insertion For Sbw Loomsmentioning

confidence: 99%

Analysis of the magnetic field and electromagnetic force of a non-striking weft insertion system for super broad-width looms, based on an electromagnetic launcher

Shunqi

Xiaoyu

et al. 2019

Textile Research Journal

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Weft insertion based on electromagnetic launch technology is a novel and very promising approach for super broad-width (6–12 m) (SBW) looms. There are considerable challenges involved in designing such a system, including analyzing the electromagnetic field while incorporating the effect of a clip weft device, and accurately calculating the electromagnetic and motion parameters of the weft insertion mechanism. In this study, an electromagnetic launch, non-striking weft insertion method for an SBW loom is proposed. The electromagnetic field is analyzed with the finite element method and includes the effect of a clip weft device. Simulation of the motion, analysis of the maximum flight speed of the clip weft device and the work done by electromagnetic force are presented. We also describe an experimental model for electromagnetic launch weft insertion and calculate the electromagnetic force required for weft insertion, using analytical methods and numerical finite element methods. Comparison of the results with measured values shows that this electromagnetic launch weft insertion system has good flexibility. In addition, the weft insertion speed required for different width looms can be obtained by changing the current of the coil or the coil stage number of the launching system.

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Section: Principles Of Electromagnetic Launch Weft Insertion For Sbw Loomsmentioning

confidence: 99%

Analysis of the magnetic field and electromagnetic force of a non-striking weft insertion system for super broad-width looms, based on an electromagnetic launcher

Shunqi

Xiaoyu

et al. 2019

Textile Research Journal

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“…The flux density vector component produced by 16 BSCs arranged in two poles, as is shown in Figs. 7 and 8, is given in Fig.…”

Section: A Modeling Of the Bsc Magnet And Calculation Of Flux Densitmentioning

confidence: 99%

Design of a Linear Bulk Superconductor Magnet Synchronous Motor for Electromagnetic Aircraft Launch Systems

Štumberger

Aydemir

Žarko

et al. 2004

IEEE Trans. Appl. Supercond.

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Abstract-High-temperature superconducting (HTS) material in bulk form is used to design a linear synchronous motor for an electromagnetic aircraft launch system. The motor is designed without an iron core. Stator coils are placed in the air while the permanent magnets used in conventional design of linear permanent magnet synchronous motors are replaced by the HTS bulk magnets. The physical, operational, and equivalent circuit parameters of the linear motor with HTS bulk magnets are compared with those of a linear permanent magnet synchronous motor and linear induction motor designed for the same application. Results show that utilizing superconducting magnets is only superior at temperatures below 40 K.

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“…The electromagnetic launch system (EMLS) is a revolutionary launch system, which can accelerate the target objects to high speed in a short distance. Compared with the traditional launch systems based on the mechanical energy or chemical energy, the EMLS has certain features such as high power, high efficiency, high reliability and great dynamic performance [1] [2]. The double-sided linear permanent magnet motor (LPMM) for electromagnetic aircraft launcher was first presented in 2002 [3].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of High-Speed Double-Sided Linear Permanent Magnet Motors With Segmented Trapezoidal Magnetic Poles

Wang

Yan

2021

IEEE Access

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For the kilometer-level electromagnetic launch system, a high-speed double-sided linear permanent magnet (PM) linear motor is presented in this paper. To enhance the average thrust force, reduce the thrust ripple and normal force of linear motor, a segmented trapezoidal PM shaping method is proposed. Compared with conventional PM shaping method, the segmented trapezoidal PMs achieves less force ripple, greater average force and lower manufacturing difficulty. The risk of PM demagnetization fault has been taken into account. To reduce the losses in the mover of the linear motor, a non-metallic light-weight mover structure is proposed. The effectiveness of segmented trapezoidal PMs and non-metallic light-weight mover are verified by the finite element method and experiment.INDEX TERMS electromagnetic launch system, permanent magnet linear motors, permanent magnetic shaping method, optimal design.

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The science and technology of electric launch

Cited by 54 publications

References 48 publications

Analysis of the magnetic field and electromagnetic force of a non-striking weft insertion system for super broad-width looms, based on an electromagnetic launcher

Analysis of the magnetic field and electromagnetic force of a non-striking weft insertion system for super broad-width looms, based on an electromagnetic launcher

Design of a Linear Bulk Superconductor Magnet Synchronous Motor for Electromagnetic Aircraft Launch Systems

Optimal Design of High-Speed Double-Sided Linear Permanent Magnet Motors With Segmented Trapezoidal Magnetic Poles

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