Bombardier Transportation Gmbh

Alstom Holdings

Magnus Jansson

Johnny Holmberg

Peter Krafka

Daniel Wagner

Henrik Mosskull

Erik Velander

Johann Galic Johann

A voltage source converter includes two half bridges each having two current valves connected in series to be connected to opposite poles of a DC source/load. A gate drive unit controls a semiconductor device of a current valve. An arrangement carries out voltage measurements for providing a value of DC voltage between the opposite poles. A voltage divider connected across the two current valves measures DC voltage between opposite poles and each voltage divider has an output connected to processing parts delivering a digital signal representing a value of the DC voltage between the poles. Two gate drive units send a digital signal to a calculating unit to carry out a quality estimation of the digital signals and to calculate a DC voltage value from the signals while giving each signal a weight corresponding to the quality value adhered thereto and then forming a weighted average value.

Voltage source converter and a method for operation thereof

A system for feeding electric power to a first consumer () comprises an input filter () with an input configured to be connected to a DC energy source and a DC intermediate link () connected to an output () of the input filter. A converter () is with an input connected to the DC intermediate link and has an output to be connected to said first consumer (). The unit () controls the converter to obtain feeding of electric power requested by the first consumer independently of variations of the voltage on the DC link (). An assembly is configured to act stabilizing on that voltage by controlling the converter to add a first power component to the power to be fed to the consumer. A second consumer () is controlled to consume a second power component to either assist the control of the converter to obtain the stabilization or alone take care thereof.

System and a method for feeding electric power to a consumer thereof

Growing community of inventors

Kvicksund, Sweden

Magnus Jansson