Concept

Electric generator

Related publications (266)

A CLOSED LOOP CONTROL STRATEGY FOR A FREQUENCY-ONLY CONVERTER WITH HIGH EFFICIENCY

Many electric power generators use gas turbines as power sources, coupled through a mechanical gearbox in order to adapt their synchronous speed to the optimal rotation speed of the turbine. This paper proposes to replace the mechanical gearbox with a flex ...

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

A possible role of radial electric field in driving parallel ion flow in scrape-off layer of divertor tokamaks

Richard Pitts, Marco Wischmeier, Heinz Mueller

The radial electric field in known to be one of the drivers of parallel ion flow in the SOL. It contributes to the ion Pfirsch-Schluter flow and also determines the 'return parallel flow' that can arise to compensate poloidal E x B drift. It was establishe ...

2007

Magnetohydrodynamic pumping in nuclear magnetic resonance environments

Nico de Rooij

We present a DC magnetohydrodynamic (MHD) pump as component of a nuclear magnetic resonance (NMR) microfluidic chip. This is the first time that MHD pumping in an NMR environment was observed and demonstrated. This chip generates a maximum flow rate of 1.5 ...

2007

Domain wall contributions to the properties of piezoelectric thin films

Dragan Damjanovic

In bulk ferroelectric ceramics, extrinsic contributions associated with motion of domain walls and phase boundaries are a significant component of the measured dielectric and piezoelectric response. In thin films, the small grain sizes, substantial residua ...

2007

Investigation of Giant-Magneto-Impedance (GMI) effect and magnetic hysteresis in microfabricated Permalloy/Coper device

Radivoje Popovic, Pavel Kejik, Ozge Zorlu

In this paper, we present the giant-magneto-impedance (GMI) effect in a microfabricated closed Permalloy core which surrounds a copper excitation rod. We measured a 90% change in the inductance value of the device for a sinusoidal excitation at 500 kHz in ...

2007

Investigation of giant-magneto-impedance (GMI) effect and magnetic hysteresis in microfabricated permalloy/copper device

Radivoje Popovic, Pavel Kejik, Ozge Zorlu

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2007

Time resolved measurements by the pulse height analysis soft x-ray diagnostic on TCV

Basil Duval

A single chord, single processing chain, hybrid (analog/digital) pulse height analysis diagnostic has been developed for the TCV tokamak, aiming to provide the evolution of the plasma electron temperature with a software selectable minimum temporal resolut ...

2007

Reduced complexity attacks on the alternating step generator

Willi Meier, Shahram Khazaei, Simon Fischer

In this paper, we present some reduced complexity attacks on the Alternating Step Generator (ASG). The attacks are based on a quite general framework and mostly benefit from the low sampling resistance of the ASG, and of an abnormal behavior related to the ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2007

The physics of electron internal transport barriers in the TCV tokamak

Olivier Sauter, Stefano Coda, Timothy Goodman, Roland Behn, Emiliano Fable, Costanza Zucca, Alessandro Marinoni

Electron internal transport barriers (elTBs) are generated in the TCV tokamak with strong electron cyclotron resonance heating in a variety of conditions, ranging from steady-state fully noninductive scenarios to stationary discharges with a finite inducti ...

International Atomic Energy Agency2007

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