Concept

Pont en H

Publications associées (47)

Non-Linear Properties and Efficiency Improvements of a Bi-Directional Isolated DC-AC Converter with Soft Commutation

This paper presents the operation principle and the properties of a single-phase DC-AC converter with medium frequency transformer and soft commutation. The influence of the non-dissipative snubber capacitor and the transformer parasitic components for ZVS ...

2005

New configurations for the tree-phase asymmetrical multilevel inverter

Alfred Rufer

This paper deals with cascade multilevel inverters. It focuses on asymmetrical topologies where the cell input voltages are of different values. These hybrid topologies might be used in several applications. Nevertheless, the need of DC-DC converters to su ...

2004

Resolution and efficiency improvements for three-phase cascade multilevel inverters

Alfred Rufer

This paper deals with cascade multilevel inverters. It focuses on asymmetrical topologies where the cell input voltages are of different values. These hybrid topologies may be advantageous for several applications. Nevertheless, the need of DC-DC converter ...

2004

A Generalized Design Principle of a Uniform Step Asymmetrical Multilevel Converter For High Power Conversion

Alfred Rufer, Martin Veenstra

This paper is focused on a general design principle of a uniform step multilevel converter, with K series-connected full bridges inverters per phase. A new design terminology is proposed and analytical relationships are established. The DC-voltage sources ...

2001

Asymmetrical multilevel inverter for large induction machine drives

Alfred Rufer

This paper describes some techniques to improve the output waveform quality of multilevel inverts fed-indction machines. The investigated topologies are the diode-clamped and series-connection of H-bridges. Thesetechinques are based on an unequal dc-voltag ...

2001

30 kV/10 mA solid state anode modulator for gyrotron plasma heating: design issues and results

Damien Fasel

Three 30 kV/10 mA solid state pulsed modulators have been delivered to the CRPP in Lausanne, by the company JEMA. Each modulator supplies the anode grid of a triode type gyrotron, used for heating purpose at the third harmonic in the TCV Tokamak. The main ...

2001

Voltage peaks of low voltage induction motors due to PWM inverter supply

Jean-Jacques Simond, Basile Kawkabani

In industrial variable speed drives, the supply of low voltage induction motors by IGBT-PWM inverters through screened cables may cause dangerous over-voltage surges at the motors terminals. These voltage peaks of about twice the de link voltage, with a sh ...

1995

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