Ecole Polytechnique Federale De Lausanne

Abb Schweiz Ag

Abb Technology Ag

Drazen Dujic

Francisco Canales

Frederick Kieferndorf

Thomas Besselmann

Jakub Kucka

Akos Mester

The present invention relates to a method for operating a resonant power converter. The resonant power converter has a primary stage and a secondary stage, at least one of which is actively operated and includes a half-bridge or full-bridge inverter having a pull-up switching device, coupled in parallel with a pull-up antiparallel diode and a pull-down switching device, coupled in parallel with a pull-down antiparallel diode, comprising the steps of alternately turning-off and turning on the pull-up and pull-down switching devices according to a periodic switching scheme, wherein after turning-off one of the switching devices the complementary switching device is respectively turned on after a delay time; and initiating an error handling, if after turning-off of one of the switching devices a non-conductance state of the antiparallel diode of the complementary switching device has been determined.

Method for operating a power converter and power converter

The present invention relates to a DC/DC converter () for transferring an active power between two DC subsystems () comprising: —a first converter stage () and a second converter stage () both configured to be selectively operated as an active inverter or as a passive rectifier; —an AC coupling circuit () for coupling the first and the second converter stage () by means of an AC power transfer; and —a control unit () configured to switch the operation mode of the first and second converter stages () depending on a measurement of an amount of power transfer through the AC coupling circuit ().

DC/DC converter and a method for operating a DC/DC converter

A converter system for interconnecting renewable energy sources with a DC distribution bus comprises a converter unit which comprises an isolated DC-to-DC converter connectable to the renewable energy source, and a non-isolated DC-to-DC converter connectable to the DC distribution bus, which is cascade connected with the isolated DC-to-DC converter.

Power converter system for renewable energy sources

A converter includes an active stage for converting an AC input voltage at an AC input into an intermediate DC voltage, and a DC/DC converter for transforming the intermediate DC voltage into an output DC voltage at a DC output. The DC/DC converter has a resonant transformer formed by a resonant circuit and a transformer. The converter also includes control unit configured to actively operate the active stage only based on an output DC voltage of the DC/DC converter, an input voltage, and an input current of the converter, and to operate the DC/DC converter in an open loop mode. A method for operating such a converter is also provided.

Growing community of inventors

Paudex, Switzerland

Drazen Dujic