Fronius International Gmbh

Andreas Prinz

Franz Niedereder

Franz Peter Musil

Walter Pammer

Uwe Kroiss

Gerald Hieslmair

Gerald Pernkopf

Michael Muehlberger

Stefan Aumair

Franz Hofmanninger

Michael Mühlberger

A welding current source for providing a welding current and a welding voltage at an output in order to carry out an arc welding process includes an input-side rectifier, an inverter, which is operated with a switching frequency, a transformer having a primary winding and at least two secondary windings, at least two rectifiers arranged between the secondary windings and the output, and at least one capacitor and one load resistor at the output. At least one current-limiting reactor is arranged on the second secondary winding and the load resistor for discharging the capacitor, which can be charged by the current-limiting reactor, the current-limiting reactor, and the capacitor are dimensioned in such a way that the maximum value of the no-load voltage at the output is greater than the voltage corresponding to the transmission ratio of the primary winding to the secondary winding of the transformer.

Welding current source

The invention relates to a method for contactless ignition an arc (L) between an electrode () and a workpiece () which is to be welded, for carrying out a welding process, wherein a welding current (I) and a welding voltage (U) are provided at an output () of a welding current source (), wherein the welding current source () contains a resonance converter () for generating a periodically varying, preferably substantially sawtooth-shaped, open circuit welding voltage (U) with voltage maxima (U) which recur periodically with a repetition rate (f) and a welding current source () for carrying out the igniting process. In order to achieve reliable contactless ignition of the arc (L) without complicated circuitry, the resonance converter () is formed by a series-parallel resonant converter, and temporally synchronous high-frequency pulses (U) are superimposed on the open circuit welding voltage (U) in the region of at least some of the periodically recurring voltage maxima (U) of the open circuit welding voltage (U).

Method for contactlessly striking an arc and welding current source for carrying out a striking process

The invention relates to a method for the contactless ignition of a welding arc, in addition to a circuit () for the contactless ignition of an electric arc, comprising a charging circuit (), at least one pulse capacitor (), a decharging circuit containing a circuit, and a high tension converter () which is used to inject the high frequency ignition pulses discharged by the pulse capacitor () via the circuit to the welding electrode (). In order to create said type of ignition method and an ignition circuit () which enables the welding arc to be ignited in an exact and/or safe and rapid manner and/or to create an improved ignition quality, the charge circuit () is connected to a pulse compression circuit () comprising the pulse capacitor (), the high tension converter () and the circuit, the circuit being formed by a magnetic throttle valve (), such that a high frequency circuit of the ignition pulse can be obtained.

Method and circuit for contactless ignition of a welding arc with high frequency ignition pulse packets

The invention relates to a multi-functional remote controller () for a welding apparatus and a welding current source, which remote controller can be connected to the welding apparatus and the welding current source by at least one line, the remote controller () having setting elements and switching elements and at least one display unit. The remote controller () has a memory, in particular a memory card, and at least one additional interface, in particular a USB terminal, and the various parameters, functions and/or operating modes are set and edited by a menu-driven system.

Remote controller and control unit for a welding device

Growing community of inventors

Pettenbach, Austria

Andreas Prinz