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Modeling of Piezoelectric Transducers Made of PZT for Energy Harvesting

J. Golebiowski [1], P. Bakolik [2],
[1] Lodz University of Technology, Department of Semiconductor and Optoelectronics Devices, Poland
[2] Lodz Univeristy of Technology, Poland

This work shows the results of modeling of piezoelectric transducers used to recover energy from mechanical vibrations. The analysis consists of usefulness of commercial ceramic PZT transducers to power electronic systems. Determined output load characteristics, characteristics of the effect of stress on the output power. Systems, which recover electrical energy for example from mechanical ...

Investigation of a Hybrid Winding Concept for Toroidal Inductors Using 3D Finite Element Modeling

H. Schneider[1], T. Andersen[1], J. D. Mønster[1], M. P. Madsen[1], A. Knott[1], M. A. E. Andersen[1]
[1]Technical University of Denmark, Lyngby, Denmark

This paper investigates a hybrid winding concept for a toroidal inductor by simulating the winding resistance as a function of frequency. The problem of predicting the resistance of a non-uniform and complex winding shape is solved using 3D Finite Element Modeling. A prototype is built and tested experimentally to verify the simulation results. Finally, the COMSOL Multiphysics® LiveLink™ to ...

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 ...

Tunable Resonance of Star Shaped Nanostructures

R. Díaz de León-Zapata [1,2], B. Mora [2], M. Jose-Yacaman [3], F. J. Gonzalez [2]
[1] Instituto Tecnológico de San Luis Potosí, Av. Tecnológico s/n, San Luis Potosí, S.L.P., Mexico
[2] Universidad Autónoma de San Luis Potosí, CIACyT, San Luis Potosí, S.L.P., Mexico
[3] University of Texas at San Antonio, San Antonio, TX, USA

Auto assembled Ag-ZnO [1] star shaped nanostructures depicted in figure 1, presents their natural electromagnetic resonance at 60 THz. In this work we present that is possible to change this value by covering it with a variable in thickness layer of gold. The analysis is performed by numerical simulations using COMSOL Multiphysics® software.

Finite Element Model of a Ferroelectric

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 ...

Electromagnetic Characterization of Big Aperture Magnet Used in Particle Beam Cancer Treatment

J. Osorio Moreno[1], M. Pullia[1], C. Priano[1]
[1]Fondazione CNAO, Pavia, Italy

Resistive magnets are one of the principal components of ion medical accelerator systems used in heavy ion cancer treatment. To fulfill medical requirements, like the size of irradiation field and an uniform dose distribution, some magnets of the transport beam line may require large aperture and a large region where the magnetic field is within specifications (good field region). After a ...

Prototype Probe Development for Liquid Injection Shutdown System Tube Gap Detection by Remote Field Pulsed Eddy Current Technique

T. V. Shyam[1], B. S. V. G. Sharma[1], J. N. Kayal[1]
[1]Bhabha Atomic Research Centre, Trombay, Mumbai, India

Pressurised Heavy Water Reactors (PHWR) play a prominent role in contributing power for the Nuclear Energy Programme in India. In 540MWe type PHWR reactors, there are horizontally placed Liquid Injection Shutdown System (LISS) tubes for injecting poison into the moderator to clamp down the nuclear power under trip conditions. The Horizontally placed LISS pipes are placed perpendicular to the ...

Electrochemical Study of Potential Materials for Cochlear Implant Electrode Array

N. Lawand[1], V. Lopez[1,2], P. French[1]
[1]Delft University of Technology, Delft, The Netherlands
[2]Università degli studi di Napoli "Federico II", Naples, Italy

Cochlear Implants (CIs) are implantable prostheses that bypass the non-functional inner ear and directly stimulate the auditory nerve with electric currents, enabling deaf people to experience sound again. The CI electrode array sits inside the cochlea close to the auditory neurons. An ideal stimulation material must have low impedance with maximum charge transfer capacity in the electrochemical ...

Finite Element Modeling of Remote Field Eddy Current Phenomenon

T. Jayakumar[1], B. Purnachandra Rao[2], C. K. Mukhopadhyay[3], B. Sasi[2], V. Arjun[5], S. Thirunavukkarasu[2]
[1]Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, TN, India
[2]Nondestructive Evaluation Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, TN, India
[3]EMSI Section, Nondestructive Evaluation Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India
[5]NDE Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, TN, India

Remote field eddy current (RFEC) technique is a method of detecting defects in ferromagnetic tubes. This is based on low frequency eddy current, which employs an exciter coil and a receiver coil separated by a characteristic distance. The exciter is fed with a low frequency sinusoidal current and the receiver coil senses the perturbation of the magnetic fields caused by the eddy currents in the ...

Modeling of Rotating Magnetic Field Eddy Current Probe for Inspection of Tubular Metallic Components

T. V. Shyam[1], B. S. V. G. Sharma[1], K. Madhusoodanan[1]
[1]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 ...