Fronius International Gmbh

Günter Achleitner

Bernhard Artelsmair

Ronald Leitgeb

Gernot Trauner

David Aitzetmueller

Franz Windischbauer

Andreas Pamer

Walter Pammer

Jügen Pirchenfellner

Stephan Holzinger

Christoph Panhuber

David AITZETMÜLLER

Jürgen Pirchenfellner

Inverter

The invention relates to a method and to an apparatus for protecting transistors (S, S; S, S) arranged in at least one path, wherein transistors (S, S; S, S) connected in series to which an input voltage (Ue) is applied are arranged in a path (), and the transistors (S, S; S, S) of a path are alternately switched between a conductive state and a blocking state in order to generate an output voltage (Ua) at the center of the path. In order to prevent both transistors (S, S; S, S) of a path from triggering, the blocking state of the second transistor (S; S) of the path is checked before switching a transistor (S; S) into the conductive state, and the switching is released by way of a signal generated during the check.

Method and apparatus for protecting transistors

The invention describes a method of regulating a rectifier inverter system (), whereby electrical power is generated and/or supplied via a power source () and is transmitted from at least one d.c.-to-d.c. converter () to an intermediate circuit (), from where it is fed via a d.c.-to-a.c. converter () to an alternating voltage supply () and/or delivered to a consumer. The d.c.-to-d.c. converter () is regulated in such a way that a virtually constant current flow is applied from the input of the d.c.-to-d.c. converter (), in other words from the power source (), to the output of the d.c.-to-d.c. converter (), in other words the intermediate circuit (), during a pre-settable period irrespective of the power drawn off from the intermediate circuit (), whereas during this same period power is drawn off from the intermediate circuit () to feed it to the alternating voltage supply () or deliver it to the consumer. A controller or a control system of the d.c.-to-d.c. converter (), in particular a desired value for regulating the current flow through the d.c.-to-d.c. converter (), is re-set whenever the period elapses.

Method for regulating an inverter system

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Sattledt, Austria

Günter Achleitner