Consultez les proceedings de la Conference COMSOL 2020
High Field Magnetic Diffusion into Nonlinear Ferrimagnetic Materials
Ferrimagnetic based, coaxial nonlinear transmission lines (NLTLs) provide a means to generate sub-nanosecond risetime pulses (from nano-second input pulses) or megawatt level high power microwave oscillations, depending on the geometry, material, and external bias fields. This ... En savoir plus
Coupled Electromagnetic - Dynamic FEM Simulation of A High Frequency MEMS Energy Harvester
In this study, a detailed finite element model coupling the motion dynamics and electromagnetics of a diaphragm based MEMS vibration energy harvester is presented. The energy harvester converts low frequency vibrations to high frequency response by magnetic actuation of a diaphragm ... En savoir plus
Muscle-Electrode Interface Simulation
In this article, the aim is to study different types and forms of electromyography (EMG) electrodes, for bipolar configuration, and the electric interface with muscle phantom. COMSOL Multiphysics allows modeling shapes and contact surfaces. Surface and needle electrodes will be modeled. ... En savoir plus
Coupled Magnetodynamic and Electric Circuit Models for Superconducting Fault Current Limiter
Finite element models, which include the shielding characteristics of superconductors are often complex and would currently not allow us to study 3D models of devices of complex geometry such as fault current limiters. We propose instead a model based on variable electric conductivity, ... En savoir plus
Hybrid FEM-BEM Approach for Two- and Three-Dimensional Open Boundary Magnetostatic Problems
In principal, the calculation of the magnetic state inside a magnetic object requires the evaluation of the field in the entire unbounded space. With finite element methods restricted to finite domains, commonly auxiliary domains are employed which result in a non-physical cut-off. Not ... En savoir plus
Transient Electromagnetic-Thermal FE-Model of a SPICE-Coupled Transformer Including Eddy Currents with COMSOL Multiphysics 4.2
Current transformers are used to measure currents in power grid systems. They are characterized by strong interactions between external electrical sources and loads respectively and the magnetic subsystem. Self-heating due to losses has to be considered because of the temperature ... En savoir plus
Modelling of a Differential Sensor in Eddy Current Non-destructive Evaluation
Interaction between the probe and a defect in eddy current non-destructive evaluation is studied. Evaluation of sensor signal response is the basis for the calculation. In this work a differential sensor is considered and the problem regarded here is problem 8 from the testing of ... En savoir plus
Benchmark of COMSOL vs. ROXIE Codes for the Calculation of a Particle Accelerator Quadrupole
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 ... En savoir plus
Simulation of Passive Magnetic Bearing Using COMSOL Multiphysics
The article presents the process of verification of the passive magnetic bearing by the Comsol Multiphysic program. There is shown construction of the radial passive magnetic bearing PMB60x85x20-5, which was designed in the Military University of Technology. The distribution of the ... En savoir plus
Modelling Aircraft Fuel Gauging Unit using COMSOL Multiphysics Software
An investigation was undertaken into the suitability of using COMSOL for modeling an aircraft capacitive fuel gauging unit. A model of a sensor immersed in a fluid was developed for rectangular tank geometry with a range of fluid levels and sensor orientation using the electrostatics ... En savoir plus