P.R. Sainz, A.I. De Andrés Rubio, and A.L. Dorado
Departamento de Electrónica, Escuela Politécnica Superior, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
Ferroelectric technology continues to attract significant interest due to its wide range of applications (capacitors, nonvolatile memories, accelerometers ...). In this work we present a finite element model of a ferroelectric. Piezoelectric and ferroelectric matrix are included. The coupling between the piezoelectric and ferroelectric parameters be introduced formally using a thermodynamic ...
Middle East Technical University
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 carrying coils. AC/DC, Solid Mechanics and Moving Mesh (ALE) modules are coupled together in one 3-D model to ...
Modeling of Rotating Magnetic Field Eddy Current Probe for Inspection of Tubular Metallic Components
T. V. Shyam, B. S. V. G. Sharma, K. Madhusoodanan
Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
Rotating Magnetic Field Eddy current technique is a promising technique for inspection of flaws in metallic tubular components. Three primary coils, 120 degrees apart in space, are excited with three phase current source, by virtue, a rotating magnetic field polarised in radial direction is generated. This radial field interacts with metallic tube and generates ...
T. Furukawa, H. Tanaka, H. Itoh, H. Fukumoto, M. Ohchi
Saga University, Saga City, Saga, Japan
Chiba Institute of Technology
In transient analyses of electromagnetic fields with moving media, it is difficult to grasp the phenomena theoretically in the same manner of the convective heat diffusion since the treatment of the coupled problem with the field and dynamics must be necessary. In this presentation, we illustrate the dynamic magnetic flux patterns in the electric guitar pickup, where the string will move over ...
R. Eisenschmid ,
 OPTIMA pharma GmbH, Schwäbisch Hall, Germany
Adaptive Optics is common sense, since many people use digital cameras with electromechanical iris actors on elastic autofocus lenses. This project tries to create a COMSOL Multiphysics based mathematical model of adaptive optics with electrostatically induced deformation of dielectric gels. Upper and lower sides of a lens (dielectric conductive gel) are coated by transparent conductive films, i ...
A. Bergqvist , P. Jacobsson ,
 Volvo Cars, Gothenburg, Sweden
Electromagnetic compatibility (EMC) is a growing issue in cars due to the increase in electrification of vehicles. Simulations can be useful for predicting issues at an early stage in the development cycle. This includes investigating EM stray fields that various components generate and are themselves exposed to. However, the situation is made more complicated by the fact that in many cases, ...
B. A. Marmo , M. P. Snaith ,
 Xi Engineering Consultants, Edinburgh, United Kingdom
An electrostatic headphone includes many interrelated design elements that affect the frequency response of the headphone and the users listening experience. Xi Engineering Consultants (XI) partnered with Warwick Audio Technologies (WAT) to investigate the complex behavior of one-side electrostatic speakers. Xi developed a GUI that helped WAT engineers optimize their speaker using virtual tools ...
E. Langlois , P. Finnegan , J. Pillars , T. Monson , C. J. Pearce , C. St. Johns , M. Ballance 
 Sandia National Laboratories, Albuquerque, NM, USA
Electroplated CoFe alloys demonstrating Joule magnetostriction (i.e., a large change in material shape induced by an applied magnetic field) have been recently developed for the creation of microfabricated magnetoelastic resonators for tagging applications. This development requires a measurement technique for evaluating film magnetostriction performance to provide feedback for optimization of ...
J. M. Russell ,
 Emeritus Professor, Florida Institute of Technology, Melbourne, FL, USA
This talk is for intermediate-level users of COMSOL who, like the present author, are relative newcomers to numerical simulation but have a strong grounding in Hydrodynamics or related areas of Mathematical Physics. Most turn-key Computational Fluid Dynamics packages, including COMSOL’s, are well suited to the simulation of internal flows where the user has in mind a definite inlet, outlet, and ...
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 ...