M. Puskarczyk, B. Jamieson, W. Jurczak
ABB Corporate Research Center, Kraków, Poland
The effects of sharp corners on the flux distribution in a ferromagnetic core are modeled using COMSOL Multiphysics® to determine the time-domain flux density for an applied field which is uniform in the non-corner section of the core. The frequency spectrum of the flux distribution is calculated for testing points through the corner and the effects of harmonic frequencies on the flux and loss ...
D. Bayat , I. Kjelberg , G. Spinola Durante , D. Schmid 
 CSEM SA, Neuchatel, Switzerland
 CSEM SA, Alpnach, Switzerland
 CSEM SA, Landquart, Switzerland
An ion trap resonator, used for mass spectrometry, is investigated. Simulations are used to define the stabilization criterion of ion trajectories by optimization of the electrode configurations. The ion interactions are investigated and shown to help in reduction of ion-diffusion. Space charge effects simulate the induced voltages on pickup electrodes.
P. Priyadarshi , J. Bahl , B. Muralidharan 
 Indian Institute of Technology Bombay, Mumbai, India
Thermoelectric power generation has been envisioned as a clean energy alternative to conventional thermal to electric power generation for decades due to its noiseless and low-cost operation. However, a typical thermoelectric generator suffers from low device efficiency, so it has been a constant endeavor for thermoelectric researchers’ community to consider alternate thermoelectric materials ...
L. Roohisefat , S. Mottaghi , M. Li , U. G. Hofmann , V. A. Coenen ,
 Department of Stereotactic and Functional Neurosurgery, Medical Faculty, Freiburg University. Department of Neurosurgery, Section for Neuroelectronic Systems, Medical Center, Freiburg University, Freiburg, Germany
 Department of Neurosurgery, Section for Neuroelectronic Systems, Medical Center, Freiburg University, Freiburg, Germany
 Department of Stereotactic and Functional Neurosurgery, Medical Faculty, Freiburg University, Freiburg, Germany
 Department of Neurosurgery, Section for Neuroelectronic Systems, Medical Center, Freiburg University. Cluster of Excellence „BrainLinks-BrainTools“,DFG EXC 1086, Freiburg, Germany
 Department of Stereotactic and Functional Neurosurgery, Medical Faculty, Freiburg University. Cluster of Excellence „BrainLinks-BrainTools“,DFG EXC 1086, Freiburg, Germany
Deep Brain Stimulation (DBS) is known to alleviate symptoms of some movement disorders and is currently tested for its clinical value in several psychiatric disorders. Although the exact mechanism of DBS is not well understood yet, an activation of white matter structures is the most likely one. The spatial distribution of the electric field originating from implanted DBS electrodes is ...
Modeling Of A Single Pulse Electric Discharge At Sphere/Flat Interface By Coupling Contact Multiphysics And Phase Transformations
G. Maizza, P. Di Napoli, and R. Cagliero
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, Torino, Italy
Contact electro-thermal phenomena are of great theoretical and technological interest to a large number of processing applications, such as spot welding, current-assisted sintering, electrical circuitry (switches) and motors. A model has been developed, aiming at predicting physical and metallurgical phenomena in a steel sample upon rapid heating induced by current pulse discharge. Electric ...
ABB, Corporate Research, Zürich, Switzerland
The design of modern electric insulation devices for medium and high voltage (HV) applications requires computational work that goes beyond solving just a Laplace equation for the electric potential, and limiting the electric field below critical values. Both field calculation and determination of breakdown limits are often challenges for the development of HV insulation systems. Two examples ...
U.N. Mughal, M.S. Virk, K. Zaman
Narvik University College, Narvik, Norway
Heterogeneous materials with different phases, are conductive and insulating (dielectric), and are physically present in different natural materials as e.g. atmospheric ice. Jonscher’s proposed ‘universal dielectric response’ is not sufficient for such materials, as it only reflects conductivity as a nonlinear function of frequency, whereas at lower temperatures dipolar vibrations are also very ...
Sonsight Inc. / NSWC, Accokeek, MD, USA
Cogging torque in permanent magnet motors and generators is characterized by a torque ripple. These torque fluctuations cause vibrations, noise and speed fluctuations. This paper presents finite element (FE) analyses results that show a previously unaddressed low frequency modulation of cogging torque ripple. The paper resulted in an analytical formulation of cogging torque with low frequency ...
I. Rodriguez, and J. L. Munoz
The field quality requirements of most particle accelerator magnets are very tight and, therefore, very precise simulations are needed to accurately calculate these devices. CERN\'s ROXIE code is widely used as a reference software to calculate normal conducting and superconducting magnets for particle accelerator applications. ROXIE uses the full vector potential coupled to the BEM-FEM ...
Using the Electrical Field Analysis for Assessment of the Influence of Paper Insulation on Discharge Initiation in Oil
P. Rozga, D. Hantsz
Technical University of Lodz, Lodz, Poland
Conclusions about the influence of paper insulation on the electrical discharge initiation in mineral oil may be drawn on the basis of experimental studies. However, in some cases, these conclusions may be supported by electrical field analysis. Determination of maximum values of electrical field stress in the vicinity of model electrode setups may bring a new information about initiation ...