Concept

Générateur électrique

Publications associées (266)

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

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

A Hybrid Energy Storage System Based on Compressed Air and Super Capacitors With Maximum Efficiency Point Tracking (MEPT)

Alfred Rufer

In addition to the high-capacity storage facilities based on hydropower technologies, electrochemical solutions are today’s candidate for storage for renewable energy sources support. However, sustainability and limited life cycles of batteries are often i ...

2006

Hybrid Energy Storage System Based on Compressed Air and Super-Capacitors with Maximum Efficiency Point Tracking (MEPT)

Alfred Rufer

This paper presents a hybrid energy storage system mainly based on Compressed Air, where the storage and withdrawal of energy are done within maximum efficiency conditions. As these maximum efficiency conditions impose the level of converted power, an inte ...

2006

Capturing the hydrokinetic energy of the Rhone River

Anton Schleiss, Giovanni De Cesare, Hanane Moukhliss

In the current economic situation regarding electric generation and conservation of the environment, it is essential to develop sustainable technologies. From this point of view, hydropower is an excellent resource with a consequently high value. The syste ...

2006

Ferroelectric-dielectric tunable composites

Nava Setter, Alexander Tagantsev

The dielectric response of ferroelectric-dielectric composites is theoretically addressed. Dielectric permittivity, tunability (relative change of the permittivity driven by dc electric field), and loss tangent are evaluated for various composite models. T ...

2006

On the use of the equal area rule for the wire-grid representation of metallic surfaces

Marcos Rubinstein, Abraham Rubinstein

This paper presents a brief theoretical discussion on the issue of the wire-grid representation of surfaces using the Numerical Electromagnetics Code (NEC). Different approaches for the determination of the parameters (in particular, the segment radii) of ...

2006

Impact of fast vertical and radial plasma movement on type-1 ELMs in ASDEX upgrade

Yves Martin, Jonathan Bryan Lister, Sun Hee Kim

For the ITER project it is clear that steps have to be taken in order to avoid or mitigate type-I ELMs when operating in the standard H-mode scenario. Otherwise, divertor power loads induced by intrinsic ELMs will result in an intolerably short divertor li ...

2006

Unbalanced DC-link voltage regulation in a back-to-back 3-level PWM converter for a doubly-fed induction motor/generator.

Jean-Jacques Simond, André Hodder, Alexander Schwery

An unbalanced DC-link voltage regulation strategy is proposed for a three-level voltage source inverter used in the rotor cascade of a double-fed asynchronous motor-generator. The major problem in determining the presence of the unbalanced component is inv ...

2005

Hybrid Energy Storage System based on Compressed Air and Super Capacitors with MEPT (Maximum Efficiency Point Tracking)

Alfred Rufer

This paper presents a hybrid energy storage system based on Compressed Air Energy Storage (CAES), where the charging and discharging is done within maximum efficiency conditions. As the maximum efficiency conditions impose the level of converted power, an ...

2005

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