Concept

Field coil

Related publications (55)

Optimization of shielded PCB air-core toroids for high efficiency dc-dc converters

The paper describes the design of optimized PCB air-core toroids for high frequency DC-DC converters with strict requirements in terms of volume and noise. The effect of several design parameters on the overall inductor volume, on DC and AC winding resista ...

2009

Test results of a large size, forced flow Nb3Sn conductor, based on a design alternative to the cable-in-conduit

Pierluigi Bruzzone, Boris Stepanov, Rainer Wesche, Martin Vogel

An R&D program at CRPP investigates the design of large size Nb3Sn conductors, with the aim to improve the effectiveness and hence the cost of large size, force flow conductors. A design based on a solder filled flat cable, by react wind method, is selecte ...

2007

Large low speed hydrogenerators - UMP and additional damper losses in eccentricity conditions

Stefan Keller

The present thesis is an advanced contribution to the design process of large synchronous generators with high number of poles. It proposes two original contributions, the first one allowing a very precise prediction of the no-load voltage and of the no-lo ...

EPFL2007

Microwave integrated electronics for ESR spectroscopy

Tolga Yalçin

In this study, we deal with the design and implementation of microsystems for electron spin resonance (ESR) applications. Three different microsystems are designed with different approaches for microwave magnetic field generation, ESR detection and sample ...

EPFL2007

A Space Vector PWM Technique for Symmetrical Six-Phase Voltage Source Inverters

Drazen Dujic

Six-phase a.c. motor drives are usually supplied from two-level six-phase voltage source inverters (VSIs), which are controlled using appropriate PWM techniques. Most of the existing work applies to the asymmetrical six-phase VSI, supplying an asymmetrical ...

2007

Microfabricated solenoids and Helmholtz coils for NMR spectroscopy of mammalian cells

Florian Maria Wurm, Radivoje Popovic, Franck Vincent, Martin Jordan, Mathieu Benjamin Stettler, Klaus Ehrmann

NMR-microprobes based on solenoids and Helmholtz coils have been microfabricated and NMR-spectra of mammalian cells have successfully been taken. The microfabrication technology developed for these probes consists of three electroplated copper levels for l ...

2007

A Novel Air-Gap Monitoring System For Large Low Speed Hydro-Generators.

Jean-Jacques Simond, Mai Tu Xuan, Roland Wetter, Stefan Keller

This paper describes a novel and patented air-gap monitoring system for large low speed synchronous hydro-generators. This new system is based on inductive sensors, it is able to measure in real time a static or a dynamic rotor eccentricity, a stator or a ...

2006

Analytical formula for the torque/emf constant of a slotless BLDC motor

Yves Perriard, Miroslav Markovic

An original analytical formula for the torque/emf constant of a slotless brushless DC (BLDC) motor is presented. It is obtained by solving and integrating the permanent magnet field. In addition, formulas for the both stator and rotor iron fields are deriv ...

2006

Computation of the no-load voltage waveform of laminated salient-pole synchronous generators

Jean-Jacques Simond, Mai Tu Xuan, Stefan Keller

This paper presents a combined analytical and finite-element (FE) method for computation of the no-load voltage waveform of laminated salient-pole synchronous generators. The described method takes into account saturation effects as well as the damper bar ...

2006

Contribution to the active generator principle for high power electric supply

Massimiliano Visintin

In recent years the use of solid state frequency converters is rapidly increasing in the industrial and power plants where electric machines are installed, since it allows variable speed operations for the electric system, thus becoming a key factor which ...

EPFL2006

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