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Germanier Alain

Adjoint-e scientifique HES A

Main contract

Adjoint-e scientifique HES A

Phone: +41 58 606 87 31

Desktop: ENP.23.N410

HES-SO Valais-Wallis - Haute Ecole d'Ingénierie
Rue de l'Industrie 23, 1950 Sion, CH

Faculty
Technique et IT

Main Degree Programme
Systèmes industriels

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2022

Individual ignition of RF microplasma array at atmospheric pressure

Scientific paper ArODES

David Martinet, Sebastian Filliger, Alain Germanier, Gilbert Gugler, Christoph Ellert

Plasma Processes and Polymers, 2022, article no. e2200131

Link to the publication

Summary:

Following the trend of miniaturization in semiconductor industry, atmospheric plasma jets in array configuration were developed for cleaning or treatment of workpieces under homogeneous conditions. We describe here first, the development of a small array of five individual identical plasma cells where each cell is ignited and quenched individually, which can be upscaled to several tens or hundreds of cells. The power electronics for ignition of plasma is composed of a multiplexing system with a kHz high-voltage plasma ignition pulse and an RF-supply that can be distributed to each ignited cell to maintain the plasma in the respective cell. Experimental results show an ignition voltage for argon of 1300 V and RF-current per cell of 70 mA.

2005

Small variable speed power plant on a drinking water network

Conference ArODES

Hans-Peter Biner, Michel Dubas, Alain Germanier

Proceedings of the European Conference on Power Electronics, Intelligent Motion and Power Quality PCIM 2005, 7-9 June 2005, Nüremberg, Germany

Link to the conference

Summary:

A 50 kW turbine is used to recover the hydraulic energy lost in the pressure reduction valve at the inlet of the urban water network. A highly variable flow rate and a constant outlet pressure require the design of a variable speed power plant. The turbine is in fact a pump running backwards and the generator is a standard component. A frequency converter with a wide input voltage range has been developed for photovoltaic, wind and small hydropower plants.

Design for a new high frequency inverter-charger, controlled by a fixed point DSP

Conference ArODES

Alain Germanier, Hans-Peter Biner, Didier Blatter

Proceedings of the European Conference on Power Electronics, Intelligent Motion and Power Quality PCIM 2005, 7-9 June 2005, Nüremberg, Germany

Link to the conference

Summary:

This paper details the development of a new universal power supply and bi-directional inverter-charger which does not use a 50 Hz BF output transformer. The control and regulation are based on a 16 bit fixed point Digital Signal Processor (DSP). With the help of flexible digital regulation algorithms, the device can operate in many different configurations which include an inverter, battery charger, stand-alone, injection, boost, and parallel. A prototype was built and tested in the range of 1.5kVA. Key features are the reduction in size and weight of the equipment, the speed of regulation and the quality of grid and battery currents.

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Germanier Alain

Adjoint-e scientifique HES A

Adjoint-e scientifique HES A

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