Concept

Electric arc

Related publications (93)

Indirect-lightning performance of distribution lines: Influence of protection devices

For an improved assessment of the indirect-lightning performances of distribution systems, the real configuration of the system, which means the topology, the presence of protection devices such as surge arresters and shielding wire/neutral groundings, mus ...

2006

Cantilever beam electrostatic MEMS actuators beyond pull-in

Subrahmanyam Venkata Ravi Mohana Sai Gorthi

The operational range of electrostatic MEMS parallel plate actuators can be extended beyond pull-in in the presence of an intermediate dielectric layer, which has a significant effect on the behavior of such actuators. Here, we study the behavior of cantil ...

Institute of Physics2006

Water drops and cavitation bubbles in microgravity

Mohamed Farhat, Nicolas Dorsaz, Claude Nicollier, Danail Obreschkow, Philipp Kobel, Aurèle De Bosset

We realized an experimental setup to study the dynamics of cavitation bubbles inside spherical water drops produced in microgravity (8th Student Parabolic Flight Campaign, European Space Agency ESA). Water volumes of up to 8 ml (25 mm diameter) were expell ...

2005

Time-resolved imaging and spatially-resolved spectroscopy of electrical discharge machining plasma

Christoph Hollenstein, Antoine Descoeudres, Ricardo Pérez Suárez

The plasma created during electrical discharge machining is investigated with imaging and spatially-resolved optical emission spectroscopy. Analysis of the pre-breakdown duration shows that the breakdown is of stochastic nature. Due to the presence of gas ...

2005

Contribution à l'accroissement des performances du processus de µEDM par l'utilisation d'un robot à dynamique élevée et de haute précision

Cédric Joseph

Electro Discharge Machining (EDM) is an attractive subtractive method for complex 3d structurization of hard and very hard conductive and semi-conductive materials. The machining capabilities of a material do not depend on its hardness but on its electric ...

EPFL2005

Microscopic four-point probe based on SU-8 cantilevers

Jürgen Brugger, Giovanni Boero, Schahrazede-Lila Mouaziz, Stephan Keller

A microscopic four-point probe (u4PP) for resistivity measurements on thin films was designed and fabricated using the negative photoresist SU-8 as base material. The device consists of four microscopic cantilevers, each of them supporting a probe tip at t ...

2005

Microscopic four-point probe based on SU-8 cantilevers

Jürgen Brugger, Giovanni Boero, Schahrazede-Lila Mouaziz, Stephan Keller

A microscopic four-point probe (micro4PP) for resistivity measurements on thin films was designed and fabricated using the negative photoresist SU-8 as base material. The device consists of four microscopic cantilevers, each of them supporting a probe tip ...

2005

Numerical Analysis of Flow Phenomena Related to the Unstable Energy-Discharge Characteristic of a Pump-Turbine in Pump Mode

François Avellan, Olivier Braun

Regions of positive slope in the pressure-discharge characteristics are one of the major concerns in design and operation of centrifugal pumps, as they are limiting the admissible operating range to values above the critical discharge. The industrial pump ...

2005

MEMS Parallel Plate Actuators: Pull-in, Pull-out and Other Transitions

Subrahmanyam Venkata Ravi Mohana Sai Gorthi

The operational range of MEMS electrostatic parallel plate actuators can be extended beyond pull-in with the presence of an intermediate dielectric layer, which has a significant effect on the behavior of such actuators. Here we study the behavior of canti ...

2005

Thickness dependence of the properties of highly c-axis textured AlN thin films

Paul Muralt

The influence of film thickness on the material properties of aluminum nitride (AlN) thin films deposited on Pt(111) electrodes has been investigated experimentally by means of x-ray diffraction, dielectric response, atomic force microscopy, interferometry ...

2004

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