Concept

War of the currents

Related publications (144)

A current-mode back-end for a sensor microsystem

is paper presents a voltage-to-current converter as a current-mode output buffering stage for sensor interfaces. The converter can be used in any microsystem needing a current output. It is presented here in the context of a Hall sensor microsystem. The sy ...

IEEE2011

Control of Current in AC Induction Machines with Pronounced Slot Harmonics for Smooth Torque

Nicolas Lorétan

AC introduction motors have been used in traction applications for a long time. They have a good efficiency for a low cost and are very robust. Most of these motors have been developed for industrial applications and they have a torque ripple because of th ...

2011

Characterization of the electrical resistance of high temperature superconductor coated conductors at high currents using ultra-fast regulated current pulses

Frédéric Sirois, François Roy, Bertrand Dutoit

This paper focuses on the experimental determination of the electrical resistance (R) of commercial high temperature superconductor (HTS) coated conductors (CCs) at currents well above the critical current. The major novelty of this work rests on the uniqu ...

2010

Heat and spin transport in magnetic nanowires

Jean-Philippe Ansermet, Haiming Yu, Simon Granville

Transport measurements are carried out in which temperature oscillation is applied to magnetic nanostructures. Using spin valves, this measurement reveals aspects of the spin transport in non-collinear configurations. In one implementation, an AC voltage i ...

Elsevier2010

Temperature derivative of the resistance of spin valves

Jean-Philippe Ansermet, Haiming Yu, Simon Granville, Julie Dubois

Spin-dependent transport properties of nanowires containing individual Co/Cu/Co pseudo-spin valves were investigated by monitoring an AC voltage induced by a temperature oscillation under a continuous DC current. We observed sharp peaks in the field-depend ...

Elsevier2010

Second Harmonic Detection of Spin-Dependent Transport in Magnetic Nanostructures

Jean-Philippe Ansermet, Simon Granville

Detection of the second harmonic response of magnetic nanostructures to an ac current is shown to be a very sensitive probe of the magnetization reversal process. A temperature oscillation is obtained by Joule heating instead of using a laser as the heat s ...

2010

Flow recirculation when pumping liquids with AC electric fields: experiments and simulations

Nico de Rooij, Luca Ribetto

Many popular micropumps implement moving parts that presents serious drawbacks. This is one of the reasons for the growing interest in valveless micropumps. Pumps exploiting AC electric fields are investigated here. Theoretical results are recalled and the ...

2010

An Information Theoretic Combination of MFCC and TDOA Features for Speaker Diarization

Hervé Bourlard, Fabio Valente, Deepu Vijayasenan

This work describes a novel system for speaker diarization of meetings recordings based on the combination of acoustic features (MFCC) and Time Delay of Arrivals (TDOA). The first part of the paper analyzes differences between MFCC and TDOA features which ...

Idiap2010

Self-aligned nanolithography by selective polymer dissolution

Francesco Stellacci

We report a novel approach to the fabrication of self-aligned nanoscale trench structures in a thin polymer layer covering on conductive materials. By passing AC current through a polymer-coated nanowire in the presence of an appropriate solvent, a self-al ...

2010

A Synchronous Current Control Scheme for Multiphase Induction Motor Drives

Drazen Dujic

Rotor-flux-oriented control of multiphase induction machines with sinusoidal magnetomotive force (MMF) distribution can be realized theoretically by using only two current controllers in the synchronous reference frame. In practice, however, this is inadeq ...

2009

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