Concept

Voltmeter

Related publications (42)

Impact of Materials and Design on Solid Oxide Fuel Cell Stack Operation

Jan Van Herle, Stefan Diethelm, Zacharie Wuillemin, Arata Nakajo, Nordahl Autissier

Planar SOFC stack technology based on a unique concept (SOFConnex™) uses structured gas distribution layers between unprofiled metal sheet interconnects and thin Ni-YSZ anode supported electrolyte cells. The layers are flexible both in material and designa ...

2008

New self-switching mechanisms for active bidirectional switches

Alfred Rufer, Philippe Barrade, Daniel Siemaszko

The self-switching principle is a synthesis of synchronous type switching and switch inner protection mechanisms. Both switch ON and switch OFF are performed on the base of current and voltage measurement across the switch. Applied to an active bidirection ...

2007

Microsensor for in situ flow measurements in benthic boundary layers at submillimeter resolution with extremely slow flow

Alfred Johny Wüest, Bernhard Wehrli

The currents in the lowest few millimeters of the bottom boundary layer of lakes are highly important for the dissipation of kinetic energy and for chemical processes such as oxygen transfer into the sediment. So far, no high-resolution flow velocity profi ...

Amer Soc Limnology Oceanography2007

Comparative performance of medium voltage overhead distribution lines designs submitted to induced voltages

Mario Paolone, Carlo Alberto Nucci

The aim of this paper is to present the results of the performance study of medium voltage overhead distribution lines against lightning discharges, in the way to define methodologies to reduce the system failures. The results are obtained within the partn ...

2007

A Low-Power Adaptive Bias/Clock Generator for Fine-Grained Voltage and Frequency Scaling in Multi-Core Systems

Yusuf Leblebici, Zeynep Toprak Deniz

This paper presents a continuous voltage and frequency scaling approach achieving lower transition (both energy and time) overheads implied by changing voltage levels, at a very low power dissipation and silicon area cost for multi-processor systems with i ...

2005

Lightning strikes to elevated structures: influence grounding conditions on currents and electromagnetic fields

Marcos Rubinstein, Davide Pavanello, Emanuel Petrache

This paper presents an analysis of lightning return strokes to tall structures. The interaction of lightning with a tall structure is modeled using the antenna theory. The finite ground conductivity as well as the buried grounding system of the tall struct ...

2005

Electrical characterization and modelling of lateral DMOS transistor

With the work reported in this manuscript we have essentially contributed to the electrical characterization and modelling of high voltage MOSFETs, more particularly DMOS architectures such as X-DMOS and L-DMOS able to sustain voltages ranging from 30V to ...

EPFL2005

PROGRESS IN STACK POWER DENSITY USING THE SOFCONNEX™ CONCEPT

Jan Van Herle, Stefan Diethelm, Zacharie Wuillemin, Raphaël Ihringer, Alexandre Closset, Nordahl Autissier, Diego Larrain, Christian Blanc, Emily Thorn

Our SOFC stack development technology is based on the unique SOFConnexTM concept, using flexible gas distribution layers between metal sheet interconnect and thin ASE cells. Flexibility is given both in material and design. This ensures proper electrical c ...

The Electrochemical Society2005

New configurations for the tree-phase asymmetrical multilevel inverter

Alfred Rufer

This paper deals with cascade multilevel inverters. It focuses on asymmetrical topologies where the cell input voltages are of different values. These hybrid topologies might be used in several applications. Nevertheless, the need of DC-DC converters to su ...

2004

An automatic offset compensation technique applicable to existing operational amplifier core cell

Maher Kayal, Michel Declercq

An automatic offset compensation scheme for 2 stages operational amplifier is described. The presented technique can be applied to an existing OA core cell without modifying its design. Offset voltage is reduced by digitally adjusting the resulting offset ...

1998

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