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Showing 1 to 16 of 16 for “"Ferromagnetic Material"”.
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Hysteresis phenomena of ferromagnetic bodies using the nonlocal exchange energy model
We examine the relaxed minimization problem for ferromagnetic bodies using the nonlocal exchange energy model. We show that the model possesses a wide range of phenomena including hysteresis, hysteresis subloops, Barkhausen effect, and demagnetization. The results are in three parts. First, we …
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Low frequency, in-situ vibrating sample magnetometer : electrical systems and control software design
… been built to measure the in-situ properties of ferromagnetic catalysts. The instrument allows measurements to be taken during an experimental catalyst test run (in-situ). The vibration is performed by a motor crank arrangement frequency of 2 Hz. The software designed to control the instrument …
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Study of Dosimetric and Thermal Properties of a Newly Developed Thermo-brachytherapy Seed for Treatment of Solid Tumors
… marker core and the air gap are replaced with ferromagnetic material. The ferromagnetic core produces heat when subjected to an alternating electromagnetic (EM) field and effectively shuts off after reaching the Curie temperature (T<sub>C</sub>) of the ferromagnetic material, thus establishing …
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Design and characterization of a radio-frequency dc/dc power converter
… and completely eliminates the need for ferromagnetic material in the converter. As a result, power converter size, weight and cost can all potentially be reduced. Moreover, converter output power and efficiency remain high because of the soft-switching capabilities of RF amplifiers. This …
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Modeling the United States Unemployment Rate with the Preisach Model of Hysteresis
… physically through the magnetization of a ferromagnetic material. In order to mathematically describe systems with hysteresis, we use the Preisach model. A discussion of the Preisach model is given as well as a method for computing the hysteretic transformation of an input variable. The …
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Field and current induced magnetization reversal in patterned Pseudo Spin Valve devices
… The PSV stack comprised a layer of soft ferromagnetic material Ni80oFe20 (NiFe or Py), a non-magnetic spacer layer of Cu, a hard ferromagnetic layer of Co and a capping layer of Au. The current flowed in plane (CIP) and the devices displayed giant magnetoresistance (GMR). Three different …
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A dynamic circuit-based model for ferromagnetic materials
… loaded SRM is typically designed to saturate the ferromagnetic material that comprises the stator and rotor of the machine whereas a lightly loaded machine does not. Therefore, the model of the machine should be able to handle both a large range in frequency and input excitation levels of the …
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Magnetic domain walls driven by interfacial phenomena
A domain wall in a ferromagnetic material is a boundary between differently magnetized regions, and its motion provides a convenient scheme to control the magnetization state of the material. Domain walls can be confined and moved along nanostrips of magnetic thin films, which are proposed …
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Controlling the structure and dynamics of magnetoresponsive particle suspensions for enhanced transport phenomena
… The magnetic particles are composed of a ferromagnetic material—such as iron, nickel, cobalt, or Permalloy—and can exist in a variety of shapes, including spheres, platelets, and rods. The shape of the particles is particularly important, as this can determine the type of behavior the …
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Use of Permanent Magnets to Improve the Seismic Behavior of Light-Framed Structures
… of attraction between the permanent magnet and ferromagnetic material like steel was utilized to produce the required friction resistance. A sliding wall configuration consisting of flexible permanent magnets and steel plates sandwiched between the plywood sheets was analyzed for its …
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Position Estimation in Switched Reluctance Motor Drives Using the First Switching Harmonics of Phase Voltage and Current
… circulating currents within the body of a ferromagnetic material under conditions of a time varying magnetic flux, the effects of eddy current losses and resistance changes due to heating decrease the magnetic field strength and thereby the reduced magnetic field decreases the magnetic …
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Modelling the induced magnetic signature of naval vessels
… resulting from the magnetisation of the ferromagnetic material of the ship, under the influence of the earth's magnetic field. The detection threat arising from this induced magnetic signature has been known for many years, and consequently, warships are generally fitted with degaussing …
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The Leaching of Cobalt in Platinum-Cobalt Fuel Cell Catalysts
… These cells are designed to contain minimal ferromagnetic material to minimise background signal.
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Fully Distributed Multi-Material Magnetic Sensing Structures for Multiparameter DAS Applications
… optic distributed acoustic sensing (DAS) scheme. Ferromagnetic nickel and Metglas® were dispersed internally within a fiber optic preform and then drawn on an in-house fiber optic draw tower to lengths in the kilometers. Due to the close proximity of the ferromagnetic metals and fiber optic core, …
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Analysis and Design of a DCM SEPIC PFC with Adjustable Output Voltage
… when the pan is made of well conducting and non-ferromagnetic material such as aluminum, due to the heating resistance become much smaller and peak output voltage of the switching bridge equals to the peak voltage of the grid, operating the SRC at the series resonant frequency can result …
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Feasibility study of components manufactured using additive technology for the electrical sector
L'abstract è presente nell'allegato / the abstract is in the attachment