Concept

Magnetic reluctance

Related publications (114)

Optimization methodology for piezoelectric transformers design

The miniaturization of classical electromagnetic transformers raises certain problems such as manufacture both the coils and the magnetic core, increase in magnetic leak and especially electromagnetic pollution of the environment. One interesting solution ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2007

Self-sensing methods to drive micro-machines

Yves Perriard, Omar Scaglione, Jan Persson

Synchronous motors require sensors in order to control these devices in speed and/or position. Basically, the auto-commutation needs 3 sensors for a 3-phase type actuator. In micro-motors, as there is no more room to place the sensors, self-sensing approac ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2007

Characterization of PEI-coated superparamagnetic iron oxide nanoparticles for transfection: Size distribution, colloidal properties and DNA interaction

Heinrich Hofmann, Alke Fink, Benedikt Steitz

Superparamagnetic iron oxide nanoparticles (SPIONs) were coated with polyethylenimine. Here, we briefly describe the synthesis as well as DNA:PEI:SPION complexes and the characterization of the compounds according to their particle size, zeta-potential, mo ...

2007

A square magnetic circuit analysis using Schwarz-Christoffel mapping

Yves Perriard, Marcel Jufer, Miroslav Markovic

The paper presents an original method to determine the 2D magnetic field in a square magnetic circuit. To do it, the method of Schwarz-Christoffel mapping is used. This mapping is a special kind of the conformal mappings, applicable to polygonal 2D configu ...

2006

Combined Analytical-Numerical Approach for the Modeling and Analysis of Threephase Transformers.

Jean-Jacques Simond, Basile Kawkabani, Gilles Rosselet

This paper deals with a combined analytical-numerical approach for the study of the steady-state and transient behaviour of three-phase transformers. This approach based on magnetic equivalent circuits, takes into account the nonlinear B-H curve. The nonli ...

2006

A Numerical Test Platform for Large Synchronous Machines also useful as a Design Optimization Tool.

Jean-Jacques Simond, Mai Tu Xuan

This paper deals with the determination of large synchronous machine characteristic quantities using an extended 2D-finite element method and based on the knowledge of the geometry and of the physical properties of the electrical and magnetic circuits of t ...

2006

Enhancement of the efficiency of non-viral gene delivery by application of pulsed magnetic field

Heinrich Hofmann, Alke Fink, Benedikt Steitz

New approaches to increase the efficiency of non-viral gene delivery are still required. Here we report a simple approach that enhances gene delivery using permanent and pulsating magnetic fields. DNA plasmids and novel DNA fragments (PCR products) contain ...

2006

Miniaturized hybrid inductors and transformers

In the frame of this thesis, we have developed a novel batch-type technology for the realization of three-dimensional millimeter-size transformers for ultra-small low-power (0.1-1 Watt) applications. The technology is based on the three-dimensional micropa ...

EPFL2005

Magnetic detector made on a semiconductive substrate

Pavel Kejik

Excitation circuit is formed by a single planar coil of an essentially square shape (9) with the magnetic core (10) in the f of a diagonal cross with the legs (101, 102) extending towards the corners of the square defined by the outer circumference (90) th ...

2005

Multi-dimensional magnetic resonance imaging in a stray magnetic field

David Lyndon Emsley

Stray field imaging has been extensively utilized in the last 10 wars to perform very high resolution imaging of samples in a single dimension using the massive field gradient present in the fringe of a superconducting magnet. By spinning the sample around ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2005

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