Fronius International Gmbh

Andreas Pamer

Guenter Achleitner

Friedrich Oberzaucher

Bernhard Artelsmair

Gernot Trauner

Günter Achleitner

Guenter Ritzberger

Günter Ritzberger

The invention relates to a method for controlling an inverter and to an inverter a DC/DC stage, which comprises at least one main switch (S) and a discharge circuit, and with a DC/AC stage. The discharge circuit is formed by a series connection of a bidirectional switching element, which comprises two switches (SASA), and an inductivity. A device is provided for controlling the switches (SASA) and is designed such that one switch (SASA) is activated in an alternating manner and the switch-on time of the switch is determined by the controlling device prior to a switch-off time of the main switch (S).

Method for controlling an inverter, and inverter

A method for actuating an AC/DC voltage converter is specified, which has a DC voltage output between which at least one series circuit of at least two capacitors and at least one series circuit of n switching elements-is arranged, where n&#x2267;4. A connecting point of the switching elements is connected to a connection of an AC voltage input between n/2 switching elements. Two diodes are connected in an antiparallel arrangement to the two switching elements lying closest to the connecting point. In addition, a connecting point of the capacitors is connected to a connecting point of the diodes. An output voltage at the DC voltage output and a potential of the connecting point of the capacitors or diodes are provided as controlled variables, an input current at the AC voltage input is provided as a manipulated variable and the switching elements are provided as an actuating element of a control loop. In addition, a controller for implementing the method and an AC/DC voltage converter containing such a controller are specified.

AC/DC voltage transformer and method of operation therefor

The invention relates to a method for detecting arcs in a direct-current path of a photovoltaic system, wherein values of a current (I) of the direct-current path are detected during a repeating time frame () and a mean value () is generated, and such a photovoltaic system. In order to reliably detect arcs by means of a component of the photovoltaic system, values of a voltage (U), of the direct-current path are detected during the time frame () and a mean value () is generated, and at least one detection signal () and at least one detection threshold () are continuously calculated based on the mean values () for the current (I) and the voltage (U) by means of a calculation method.

Method for detecting arcs in photovoltaic systems and such a photovoltaic system

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Wallern, Austria

Andreas Pamer