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Publications associées (66)

Investigation and control of a hybrid asymmetric multi-level inverter for medium-voltage applications

Power-electronic inverters are becoming popular for various industrial drives applications. In recent years also high-power and medium-voltage drive applications have been installed. However, the existing solutions suffer from some important drawbacks. Hyb ...

EPFL2003

Supercapacitors as energy buffers : a solution for elevators and for electric busses supply

Alfred Rufer, Philippe Barrade

Supercapacitors are components for energy storage, well dedicated for applications where energy storage can help to the smoothing of strong and short time power solicitations of a distribution network. Those properties are developed for two examples. The f ...

2002

Analytical analysis of Quasi-Saturation Effect in PT and NPT IGBTs

Alfred Rufer

During the turn-on process insulated gate bipolar transistors (IGBTs) traverse a quasi-saturation region from the off.state to the on-state (saturation). The additional voltage drop due to the quasi.saturation of the junction hardly depends on the DC-link ...

2002

Importance of Quasi-Saturation Effect in the Bipolar Junction of High Voltage NPT- IGBTs for power calculations

Alfred Rufer

During the turn-on process insulated gate bipolar transistors (IGBTs) traverse a quasi-saturation region from the off-state to the on-state (saturation). The additional voltage drop due to the quasi-saturation of the junction hardly depends on the DC-link ...

2001

BLDC motor control in multiple dq axes

Yves Perriard, Frédéric Bonvin

With brushless DC Motor (BLDC), current regulators in dq axes are very appreciated for sinusoidal supply. As the set current is constant, the regulator works properly. When the back-EMF is not sinusoidal, current oscillations appear in the dq regulator. A ...

Institution of Electrical Engineers2000

Fabrication and characterization of PZT thin films for micromotors

Paul Muralt, Roland Luthier, Thomas Maeder

Piezoelectric membranes consisting of PbZrxTi1-xO3 (PZT) films on silicon diaphragms have been fabricated, investigated, and applied for micromotors. The PZT films were deposited by sputtering and sol gel techniques. Resonance amplitudes of up to 1000 nm/V ...

Taylor & Francis1995

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