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Related publications (25)

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A stick-slip/inchworm hybrid rotary piezo motor based on a symmetric triangular driving mechanism

Dongdong Zheng

A stick-slip/inchworm hybrid rotary piezomotor based on a symmetric triangular driving mechanism, which can simultaneously achieve the benefits of both stick-slip and inchworm motors, was reported in this letter. It is based on the principle of stick-slip ...

2019

High Power Electronics Innovation Perspectives for Pumped Storage Power Plants

Drazen Dujic, Pedro Camilo de Oliveira e Silva, Miodrag Basic

The current framework of high penetration of intermittent energy sources requires variable-speed pumped hydro storage power plants (PHSPs) to provide grid support functions, which are, in this case, achieved through two technologies: doubly-fed induction m ...

2018

Spatially Sampled Pressure Profile Measurements in Externally Pressurized Gas Journal Bearings

Jürg Alexander Schiffmann, Eliott Philippe Guenat, Karim Magdi Zakaria Abdelrahman Shalash

Externally pressurized gas journal bearings (EPGJB) are widely adopted to support high speed rotors. This paper presents novel experimental benchmark test data which enables EPGJB model validation. Axial and circumferential pressure profile measurements ar ...

2018

Rotating air-water ring in the vaneless gap of a pump-turbine operating in condenser mode

François Avellan, Elena Vagnoni, Loïc Andolfatto

The rotating air-water ring, featuring a bubbly flow, in the vaneless gap of a reduced scale physical model of a pump-turbine operating in dewatered condition is investigated. High speed visualizations are performed together with pressure fluctuation measu ...

2018

MVDC Distribution Fed High Power Multi-Motor Drives

Uzair Javaid

High power variable speed drives play a major role in many industrial applications. At the moment, these high power loads are supplied by the source (grid/generator) through the state-of-the-art MVAC power distribution network. The voltage levels, in these ...

EPFL2018