Results 341 to 350 of about 1,113,144 (380)
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Design formulas for electromagnetic sensing coils
Geoexploration, 1967Abstract It is demonstrated that for a certain class of electromagnetic sensing coils the geometry and weight of the device are essentially determined by the signal-to-noise ratio desired. The number of turns and the wire gauge are principally related to the required source impedance.
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Electromagnetic noise measurements using microstrip coil array
IEEE Transactions on Magnetics, 1996We developed a microstrip coil array with diode switch circuits using multilayer printed wiring board. Electromagnetic noise maps were obtained by the coil array. Its advantages are its broadband sensitivity and reduced noise measurement time compared with conventional closed field probes.
M. Yamaguchi +4 more
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Analysis of capacitively driven electromagnetic coil guns
The XIX International Conference on Electrical Machines - ICEM 2010, 2010In this paper, the performance analysis of two stages linear induction launcher (LIL) is presented. It is carried out based on current filament model (CFM) taking their transient behavior into account. A computer simulation based on the developed model, is down for predicting the electromechanical characteristics of the launcher (Current, velocity ...
Y. Bencheikh, Y. Ouazir, R. Ibtiouen
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Transient simulation of helical coil electromagnetic launchers
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2018Purpose Helical coil electromagnetic launchers (HEMLs) using motion-induced commutation strategy solve the problem of synchronization control perfectly. HEMLs can meet the requirements of multiple applications such as the electromagnetic catapult, electromagnetic mortar and high-velocity coilgun. The trade-off between the velocity and efficiency is an
Dong Yang +5 more
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Deformable, Electromagnetic, Coil Actuation for Sensor Systems
IEEE Sensors, 2005., 2006A compact means of achieving large displacement or rotational actuation, useful for a variety of sensor systems, is developed, modeled, and demonstrated. The basic device is a deformable, electromagnetically actuated coil that is fabricated in a commercial surface micromachining foundry.
B. McCarthy, V.M. Bright, M.L. Dunn
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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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Electrodynamic loudspeaker with electromagnetic impedance sensor coil
The Journal of the Acoustical Society of America, 1993An electro-acoustic system including an amplifier circuitry for amplifying an input signal to provide an amplified signal; and electrodynamic loudspeaker having at least one magnet, a diaphragm connected to a coil support, a voice coil for driving a diaphragm in response to the amplified signal with the presence of the magnet, and an electromagnetic ...
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Fabrication of Excitation Coils for Electromagnetic Microactuators
2011A key component for electromagnetic micro devices is the coil. Exposing it to an electric current results in exciting a magnetic field. The three coils most commonly used in microactuators are the meander, the planar spiral, and the helical type. For fabricating these coils in thin-film technology a combination of photolithography (for creating a ...
F. Pape +8 more
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Transverse Electromagnetic (TEM) Surface Coils for Extremities
2011High-field RF volume coils for the human limbs and heads are commonly formed from rigid cylinders. For extremity imaging this design often requires using larger one-size-fit-all volume coils that decrease transmission efficiency and SNR. Splitting the coil solves this problem by providing tighter fit.
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