Abb Schweiz Ag

Asea Brown Boveri Ag

Abb Industrie Ag

Peter D&auml;hler

Osvin Gaupp

Gerold Knapp

Horst Gr&uuml;ning

A converter circuit arrangement is disclosed for matching a variable DC voltage to a drive circuit for producing drive signals and having a three-point DC voltage intermediate circuit ( ), which three-point DC voltage intermediate circuit ( ) is formed by a first capacitor ( ) and a second capacitor ( ) connected in series with it, with one connection of the first capacitor ( ) forming an upper connection ( ) of the three-point DC voltage intermediate circuit ( ), and the first capacitor ( ) forming a center point connection ( ) at the junction point with the second capacitor ( ) and one connection of the second capacitor ( ) forming a lower connection ( ) of the three-point DC voltage intermediate circuit ( ). A first partial converter system ( ) and a second partial converter system ( ) are provided, with the input side of the first partial converter system ( ) being connected to a first pole ( ) of a DC voltage source ( ) which produces the DC voltage, and the input side of the second partial converter system ( ) being connected to a second pole ( ) of the DC voltage source ( ), a first output ( ) of the first partial converter system ( ) being connected to the upper connection ( ), and a first output ( ) of the second partial converter system ( ) being connected to the lower connection ( ). Furthermore, a second output ( ) of the first partial converter system ( ) is connected in series with a second output ( ) of the second partial converter system ( ) via the center point connection ( ). A method for matching a variable DC voltage is also specified.

Converter circuit arrangement, as well as a method for matching a variable DC voltage

Protection of a dynamic voltage restorer

The invention specifies a disconnector for decoupling a load from a supplying AC power supply system. The disconnector comprises a transformer whose primary is connected into the AC power supply system. On the secondary side, a rectifier circuit is provided which has a turn-off thyristor connected to it. In normal operation, the turn-off thyristor is kept closed, so that the power supply system supplies the load. In the event of power supply system faults or interruptions, the turn-off thyristor is opened, which disconnects the power supply system from the load owing to the transformer impedance.

High-speed disconnector using semiconductor technology

Growing community of inventors

Remigen, Switzerland

Peter Dähler

Growing community of inventors

Remigen, Switzerland

Peter D&auml;hler

Peter Dähler