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Showing 1 to 20 of 31 for “"magnetic flux density"”.
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Finite Element Analysis Based Modeling of Magneto Rheological Dampers
… is to show a 2-D MR damper and generate the magnetic flux density along the MR Fluid gap. We can detect saturation by looking at the nodal solution for the magnetic flux density. Increasing the current in the model, results in an increase in magnetic induction. We studied four different …
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Thermal-magnetic finite element model of a high frequency transformer
In high-frequency power transformers, magnetic material properties cannot be assumed to be constant. These properties vary with frequency, temperature, and magnetic flux density. Heat generation is, in turn, a function of the magnetic permeability, magnetic flux density, and frequency. Current …
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High resolution spectropolarimetric diagnostics of weak, small-scale magnetic fields in the solar photosphere
… there exists a substantial amount of ‘hidden’ magnetic energy in the quiet solar photosphere, and unlocking an understanding of this phenomenon requires the study of magnetic activity on the smallest scales accessible to observations. With the advent of next generation high resolution …
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Theoretical considerations of the magnetohydrodynamic generator
… is passed through a transverse electric and magnetic field and between two parallel plate electrodes. The induced electric field in the fluid, which is proportional to the fluid velocity and magnetic flux density, maintains a voltage drop across the electrodes and a current is generated when …
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Design and optimization of an MHD energy harvester for intelligent pipe systems
… (MHD) energy harvester with the use of the magnetic concentrator is designed and optimized. A theoretical model relating the conductivity of water, magnetic flux density B, flow velocity u and the channel volume to the power output is first established. This leads to the decoupled analysis …
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ΚΑΘΟΡΙΣΜΟΣ ΤΗΣ ΔΙΑΝΟΜΗΣ ΤΩΝ ΠΕΔΙΑΚΩΝ ΜΕΓΕΘΩΝ ΣΕ ΣΥΣΤΗΜΑ ΑΓΩΓΙΜΩΝ ΠΛΑΚΩΝ ΑΠΟ ΔΙΕΓΕΡΣΗ ΓΕΝΙΚΕΥΜΕΝΗΣ ΜΟΡΦΗΣ ΜΕ ΕΦΑΡΜΟΓΗ ΤΟΥ ΑΛΓΟΡΙΘΜΟΥ FFT
… VALUE METHOD FOR THE SOLUTION OF CERTAIN ELECTROMAGNETIC PROBLEMS. SO WE HAVE CALCULATED THE EDDY CURRENT DENSITYWITH AND WITHOUT THE DISPLACEMENT CURRENT FOR DIFFERENT KINDS OF EXCITATIONS FOR ONE CONDUCTING SLAB AND FOR A SYSTEM OF TWO CONDUCTING SLABS. WE HAVE ALSO CALCULATED THE MAGNETIC FLUX …
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Uniform Field Distribution Using Distributed Magnetic Structure
Energy distribution in a conventional magnetic component is generally not at a designer's disposal. In a conventional toroidal inductor, the energy density is inversely proportional to the square of the radius. Thus, a designer would be unable to prescribe uniform field distribution to fully …
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Integrated Current Sensor using Giant Magneto Resistive (GMR) Field Detector for Planar Power Module
… these reasons, a giant magneto resistive (GMR) magnetic-field detector was chosen as a current-sensing method. The GMR sensor utilizes the characteristics of the giant magneto resistive (GMR) effect in that it changes its resistance when it is exposed to the magnetic-flux. Because the GMR …
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A Permanent Magnetic Dipole Reaction Sphere Actuator for Spacecraft Attitude Control
… axially magnetized, NdFeB (Grade 42) sphere (K&J Magnetics SX8) with a mass of 0.22 kg and a remanence of 1.22 T. The rotor can translate up to 1.0 mm from center and rotate about the 2 axes orthogonal to its magnetization axis as the coils cannot generate torque about the rotor’s magnetization …
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A Single-Stage Passive Vibration Isolation System for Scanning Tunneling Microscopy
… and the STM stays on top of the copper stage. Magnetic damping with neodymium magnets, which induces eddy currents in the copper conductor, is the primary damping method to reduce the vibrations transferred to the mass-spring system. FEMM and MATLAB® are used to model magnetic flux density and …
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Accelerating induction machine finite-element simulation with parallel processing
Finite element analysis used for detailed electromagnetic analysis and design of electric machines is computationally intensive. A means of accelerating two-dimensional transient finite element analysis, required for induction machine modeling, is explored using graphical processing units (GPUs) …
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Nonlinear electromagnetic-thermal modeling using time domain finite element method in the machinery design
In this thesis, an electromagnetic-thermal co-simulation algorithm is developed for the three-dimensional modeling of electric machines. To couple electromagnetic (EM) and heat transfer processes, the time-domain finite element method is employed for its capability of modeling complex geometries. …
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High speed plasma flow about probes
… evaluation of the interaction between a uniform magnetic field and a compressible inviscid, electrically conducting ideal gas flow past a blunt body is presented. An experiment using a double diaphragm shock tube to produce a slug of gas with high electrical conductivity is performed to confirm …
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High speed plasma flow about probes
… evaluation of the interaction between a uniform magnetic field and a compressible inviscid, electrically conducting ideal gas flow past a blunt body is presented. An experiment using a double diaphragm shock tube to produce a slug of gas with high electrical conductivity is performed to confirm …
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Development of ground-based search -coil magnetometer systems in the polar regions and studies of ULF Pc 1--2 wave propagation in the ionospheric waveguide
… magnetometers, which measure time-varying magnetic flux density (dB/dt) and its direction, have been developed for the observations of geomagnetic pulsations in the ultra low frequency (ULF) range (a few mHz to a few Hz). The design, fabrication, and test/calibration have been performed to …
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ELECTROCHEMICAL SYNTHESIS OF MAGNETIC MATERIALS FOR MAGNETIC RECORDING AND MEMS APPLICATIONS
With the increase in the areal density for magnetic recording disks, the bits are becoming smaller so that more bits can be accommodated in a given area of disk. However, there is a certain limit up to which the bits can be made smaller until it reaches the superparamagnetic limit, where bits …
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System Identification and Calibration Techniques for Force Measurement in Active Magnetic Bearings
… for machine health monitoring. Active Magnetic Bearings (AMBs) have the capability to act concurrently as a shaft force sensor and support bearing. This capability stems from the AMB's control system, which is designed to maintain a specific rotor position, regardless of forces acting …
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Ultrasoft magnetic materials processing and characterisation
… to develop, characterise and test post-processed magnetic materials used for in-package or on-chip devices such as micro-inductors. The electrochemical post-processing has been shown to improve the magnetic properties of the NiFe alloy. The aim of this research was further to test this process on …
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Electrodeposition of High Magnetostrictive Cobalt Iron Alloy Films for Smart Tags and Sensor Applications
… undesirables that can have a negative impact on magnetic properties2, 3. The research presented here focused on maximizing magnetostriction at the optimal stoichiometry range of Co0.7-0.75Fe0.3-0.25, targeting the (fcc+bcc)/bcc phase boundary, and using a novel chemistry and plating parameters to …
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Simulations of Dynamic Relativistic Magnetospheres
… of highly conducting plasma in which the magnetic flux density is so high that hydrodynamic forces are irrelevant. In this vanishing-inertia---or ultra-relativistic---limit, magnetohydrodynamics becomes force-free electrodynamics, a system of equations comprising only the magnetic and …
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