Abstract: A method for controlling a power source is specified. The power source comprises a first converter (1) for converting an input voltage (UE) to an intermediate circuit voltage (UZK, UZK1), an intermediate circuit capacitor (2) and a second converter (3) for converting the intermediate circuit voltage (UZK, UZK1) to an output voltage (UA). A process is being controlled at the output of the second converter (3). A digital process controller predetermines at least one parameter and/or the value thereof to control the intermediate circuit voltage (UZK, UZK1) for the first converter (1) depending on an event at the output.

Abstract: A method for controlling a power source is specified. The power source comprises a first converter (1) for converting an input voltage (UE) to an intermediate circuit voltage (UZK, UZK1), an intermediate circuit capacitor (2) and a second converter (3) for converting the intermediate circuit voltage (UZK, UZK1) to an output voltage (UA). A process is being controlled at the output of the second converter (3). A digital process controller predetermines at least one parameter and/or the value thereof to control the intermediate circuit voltage (UZK, UZK1) for the first converter (1) depending on an event at the output.

Abstract: The invention describes a method of controlling and/or regulating a welding process, whereby, when an arc (15) has been ignited, a set welding process based on several different welding parameters is run. The welding process is controlled and/or regulated by a control system (4) and/or a welding current source (2). The welding apparatus (1) is switched during the welding process and is switched in particular between operating states and/or functions and/or operating modes and/or welding parameters and/or welding programmes by means of a defined movement of the welding torch.

Abstract: The invention describes a method of controlling and/or regulating a welding process, whereby, when an arc (15) has been ignited, a set welding process based on several different welding parameters is run. The welding process is controlled and/or regulated by a control system (4) and/or a welding current source (2). The welding apparatus (1) is switched during the welding process and is switched in particular between operating states and/or functions and/or operating modes and/or welding parameters and/or welding programmes by means of a defined movement of the welding torch.

Abstract: The invention relates to a voltage switching device (23) consisting of a power rectifier (26), a boost chopper (34, 35) having at least one storage element (50, 51), a transformer (40), a switching device (59), a control device (4) and a plurality of mains leads (27 to 29), the power rectifier (26) being connected to an energy source (24) by the mains leads (27 to 29) and a consumer (25) with a secondary winding (42) of the transformer (40), a power evaluating device (32) supplied with voltage from the energy source (24) being provided, the output of which is connected to the switching device (59) or to the control device (4).