Results 301 to 310 of about 92,312 (333)
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Electromagnetic force analysis of a driving coil
2012 16th International Symposium on Electromagnetic Launch Technology, 2012Electromagnetic force (EMF) analysis and configuration design of a driving coil is quite important for a coil launcher. Lots of efforts have been focused on armature and control system to improve efficiency or interior ballistic characteristic. By contrast, EMF performance of a driving coil is rarely researched.
Ting Zhan, Yadong Zhang, Jiangjun Ruan
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Solid-projectile helical coil electromagnetic launcher
2007 16th IEEE International Pulsed Power Conference, 2007Summary form only given. Helical coil electromagnetic launchers (HCEML's) can operate at significantly lower currents and higher efficiency in comparison to conventional railgun and induction coilgun launchers. The HCEML's versatility is due, in part, to its large inductance gradient which is typically 2 to 3 orders of magnitude greater than a ...
Jesse M. Neri +2 more
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Review of Scientific Instruments, 1975
The second derivative of the axial magnetic flux density is found to vanish for an electromagnet composed of three circular coaxial coils if the spacing between adjacent coils is a, if each coil contains equal ampere turns, if the radii of the end coils are a, and if the radius of the center coil is ∼5a/4.
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The second derivative of the axial magnetic flux density is found to vanish for an electromagnet composed of three circular coaxial coils if the spacing between adjacent coils is a, if each coil contains equal ampere turns, if the radii of the end coils are a, and if the radius of the center coil is ∼5a/4.
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Design and testing of a coil-unit barrel for helical coil electromagnetic launcher
Review of Scientific Instruments, 2018A coil-unit barrel for a helical coil electromagnetic launcher is described. It provides better features of high structural strength and flexible adjustability. It is convenient to replace the damaged coil units and easy to adjust the number of turns in the stator coils due to the modular design.
Ting Shu +5 more
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Electromagnetic actuator for voice coil
The Journal of the Acoustical Society of America, 1979An electromagnetic actuator for linear driving of movable heads of a magnetic disc unit in an information processing system. A plurality of slits or plates are provided with a magnetic pole inscribed directly on the internal surface of a permanent magnet, and increase magnetic reluctance of the magnetic path and reduce inductance of a moving coil, thus
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Electromagnetic force calculations for a conical coil
Metallurgical Transactions B, 1993Levitation melting devices used in the laboratory typically employ small conical coils with a reverse wound turn at the top. The magnetic field and the Lorentz forces on an electrically conducting sample, due to an alternating current flowing in a small conical coil, are studied by modeling it as a conical helix.
Udaya B. Sathuvalli, Yildiz Bayazitoglu
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Genetic Algorithms in Electromagnetism: The Helmholtz Coils
Journal of Applied Computer Science, 2006In this work, the modified genetic algorithm has been applied to solve the Helmholtz coil problem. The task of the algorithm was to determine the radius of the coils and the distance between them, which would assure that a priori assumed level of non-homogeneity of magnetic field is maintained.
Stefan Nadolski, Bożena Borowska
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Utilization of a helmholtz coil in the electromagnetic method
Combustion, Explosion, and Shock Waves, 1983The purpose of this paper is to develop a pulse electromagnet that is convenient for utilization under laboratory conditions and that will produce a homogenous magnetic field. Two kinds of Helmholtz coils--one with a twenty centimeter diameter fabricated from a sprint-slab, and one with a steel transferable coil--are used in this paper.
L. I. Savvin +3 more
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Implementation of optimized electromagnetic induction coils
SPIE Proceedings, 2014Electromagnetic induction (EMI) systems often employ separate transmit and receive coils that are placed in close proximity to one another. This placement is desirable for packaging reasons, but it makes achieving minimal mutual coupling between the two coils difficult.
Waymond R. Scott, Mark A. Reed
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The equivalence of electromagnetic coils for electron optics
Journal of Applied Physics, 1981The theoretical basis is discussed, and a stable, accurate, and efficient numerical procedure given for calculating the winding distribution that is needed on a designated target yoke so that the magnetic field it produces in a specified region of space is identical with that generated by a given primary yoke.
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