Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Optimization of an Electromagnetic Actuator with COMSOL Multiphysics

T. Müller[1], A. Schwenger[2], and H. Haase[1]
[1]Institut für Grundlagen der Elektrotechnik und Messtechnik, Leibniz Universität Hannover, Germany
[2]Volkswagen AG, Germany

This paper describes the automatic optimization of an electromagnetic actuator using a genetic algorithm.  The actuator modeled here is dedicated for charge changing valve actuation in internal combustion engines. In the first step of the simulation, several operating points are calculated using the script language of COMSOL Multiphysics. In order to reduce computation time, only one segment of ...

Modeling, Simulation, and Control of Dual Electromagnet Active Magnetic Levitation

A.K. Pi?at[1]
[1]AGH University of Science and Technology, Kraków, Poland

Introduction: The dual electromagnet configuration of Active Magnetic Levitation system (AML) where the electromagnets are locate opposite to each other, constitutes and single axis of the Active Magnetic Bearing. The same configuration can be used to test the single electromagnet AML controller. A single electromagnet AML was modeled and simulated with COMSOL Multiphysics. The modeling and ...

RFID-Enabled Temperature Sensor

I.M. Abdel-Motaleb[1], K. Allen [1]
[1]Department of Electrical Engineering, Northern Illinois University, DeKalb, IL, USA

The design of a RFID-enabled temperature sensor is described in this paper. In this sensor, a change in temperature causes structural beams to bend, which results in a proportional displacement of the plates of the capacitor. Plates\' displacement results, in turn, in changing the value of its capacitance. The capacitor of the sensor is coupled to the LC resonant network of a passive RFID tag. ...

Field-Circuit Coupling Applied to Inductive Fault Current Limiters

D. Lahaye[1], D. Cvoric[2], S. de Haan[2], and J. Ferreira[2]
[1]Delft Institute of Applied Mathematics, Department of Electrical Engineering, Mathematics and Computer Sciences, TU Delft, The Netherlands
[2]Electrical Power Processing Unit Department of Electrical Engineering, Mathematics and Computer Sciences, TU Delft, The Netherlands

Fault Current Limiters (FCLs) are expected to play an important role in the protection of future power systems due to the rising levels of the short-circuit currents. The inductive FCLs, comprising magnetic cores and one or more dc and ac windings, are particularly interesting because they inherently react on the fault. The so-called open-core FCL configuration employs only one magnetic core for ...

Electro Thermal Performance Prediction of Radio Frequency Ablation System for Efficient Cancer Treatment

C. Thiagarajan[1], V. Gnanasekar[2]
[1]ATOA Scientific Technologies Pvt Ltd, Whitefield, Bangalore, Karnataka, India.
[2]Perfint Healthcare Pvt. Ltd, T.Nagar, Chennai, India.

Cancer causes significant human deaths. Radiofrequency ablation is an encouraging procedure for cancer treatment. The objective is to demonstrate the multiphysics simulation methodology. This paper summarizes the problem , governing equations, methodology, assumptions, simulation results and discussion related to the thermal performance prediction of radio frequency ablation on a homogeneous ...

Coupling Picosecond Terahertz Pulses to a Scanning Tunneling Microscope

P. H. Nguyen [1], C. Rathje [2], G. J. Hornig [1], V. Jelic [1], C. Ropers [2], F. A. Hegmann [1],
[1] University of Alberta, Edmonton, AB, Canada
[2] 4th Physical Institute, University of Göttingen, Göttingen, Germany

Probing ultrafast processes over subpicosecond and picosecond time scales provides fundamental insight into the nature of materials. We have experimentally demonstrated terahertz (THz)-pulse-induced tunneling in a scanning tunneling microscope (THz-STM) to image surfaces with simultaneous nanometer spatial resolution and subpicosecond time resolution [1]. However, the exact mechanism by which ...

Investigating Magnetic and Electric Fields Couplings for 3D Models in Harmonic and Transient States

O. Maloberti [1], O. Mansour [1]
[1] ESIEE Amiens, Amiens, France

At present, no 3D transient magnetic and electric fields formulation with strong eddy currents and high electric fields is available in the physical applications with COMSOL Multiphysics® software. However, some industrial products need such a tool, as it is the case for induction coils of pulsed magnetic technologies. The principle is to induce a force thanks to strong eddy currents induced by ...

Study of Electromagnetic Shielding, a Comparison between Experiment and FEM Simulation

G. Sun [1], C. De Blasiis [1], O. Sekula [1], P. Corsaro [1],
[1] Brugg Kabel AG, Brugg, Switzerland

The loaded underground high voltage cable generates magnetic field with industrial frequency. Depending on the current rating and cable allocation, the magnetic exposure to public area may exceed the requested limit from customer. Extra shielding should then be applied. A primary FEM study shows that aluminum plate has a good shielding effect; the installation condition of the plate can however ...

Finite Element Method based Investigation of IPMSM Losses

M. Schmidtner [1], C. Markgraf [1], A. Frey [1],
[1] University of Applied Sciences, Augsburg, Bavaria, Germany

INTRODUCTION: This paper investigates the design of IPMSM as drive motor for an electric race car in the competition called Formula Student. A key parameter for electrical motor is the power density which is very important for the performance of such race vehicles [1] to keep the overall mass small at high power. Furthermore, to run the motor at high power and to prevent it from overheating due ...

Simulation of Flaw Signals in a Magnetic Flux Leakage Inspection Procedure

O. Nemitz, and T. Schmitte
Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany

In the inspection of steel products with respect to flaws a magnetic flux leakage (MFL) test procedure can be applied. In this procedure a “horseshoe” shaped yoke is used, whose legs are wrapped with coils through which an alternate current with a high frequency (3 kHz) is flowing. Hereby a thin magnetic field is induced near the surface of the test object which leaks from the material if a flaw ...