In this paper a variable speed generating unit is considered, equipped with permanent magnet generator. The system analysis involves appropriate models for the generator, the static converter and the grid. Moreover, an asynchronous generator mounted on the same rotor with dump loads ensures braking actions and management of the active power produced. The modelling of the generator and power ele...

Static magnetic pads with an average field strength of approximately 350 G at the level of the magnet do not affect the circulation to the equine third metacarpal region. Authors’ addresses: P.O. Box 5231, Glendale, CA 91221 (Ramey); Dept. of Radiological Health Sciences, Veterinary Teaching Hospital, Colorado State University, Fort Collins, CO 80523 (Steyn); and Division of Geological & Planet...

For low-field NMR, NdFeB permanent magnet arrangements are proposed to provide the static polarizing magnetic field. Especially a parallel and a circular arrangement of the permanent magnets, iron yokes and small shim magnets were tested and improved by COMSOL. The intent was to guide the design and the construction of NMR magnets by calculating the magnetic field strength and the associated fi...

MRI magnets generates strong and uniform magnetic fields within the field of wiev, but spatial field gradients are present outside this central region, and as consequence people moving within magnet room experience time-varying magnetic field inducing electric fields and currents in tissues. Aim of this study is the assessment, through direct static field measurements and model based calculatio...

Bearingless permanent magnet synchronous motor (BPMSM) has the characteristic of both conventional permanent magnet synchronous motor and traditional magnetic bearings. In this paper, the design and analysis of BPMSM by using Matlab/Simulink and ANSYS Maxwell are presented. The principle of electromagnetic force is utilized to ensure a stable levitation operation of BPMSM. The BPMSM mathematica...

Vortex core reversal in magnetic particle is essentially influenced by a surface anisotropy. Under the action of a perpendicular static magnetic field the vortex core undergoes a shape deformation of pillowor barrel-shaped type, depending on the type of the surface anisotropy. This deformation plays a key point in the switching mechanism: We predict that the vortex polarity switching is accompa...

It is shown that the energy harvesting capabilities of a piezoelectric cantilever can be enhanced through coupling to a static magnetic field. A permanent magnet is fixed to the end of a piezoelectric cantilever, causing it to experience a non-linear force as it moves with respect to a stationary magnet. The magnetically coupled cantilever responds to vibration over a much broader frequency ran...

The passage of a charged particle through a region of nonvanishing electromagnetic fields (e.g., a bending magnet, multipole magnet, spectrometer, electrostatic lens, electromagnetic velocity separator, etc.) can be described by a transfer map [1]. In the magnetic case, computation of this map in canonical coordinates requires a knowledge of the vector potential and its multiple derivatives wit...

Objective: Magnets are purported to aid wound healing despite a paucity of scientific evidence. The purpose of this study was to valuate the effect of static magnetic fields on cutaneous wound healing in an animal model. The literature was reviewed to explore the historical and scientific basis of magnet therapy and to define its current role in the evidence-based practice of plastic surgery. M...

MR is undoubtedly the most revolutionary imaging technology of the century. The clinical jsefulness of MRI has been widely accepted in the CNS, spine and certain body areas and the future vision of MR includes wide-ranging morphological and functional applications in cardiology, oncology, orthopaedics, obstetrics and sports medicine. In order to accommodate this wide range of clinical applicati...