Device and method for switching alternating current

Abstract

The invention relates to a device and a method for switching alternating current. The invention relates to a device for converting an input alternating current, said device comprising: a first transformer (4a) arranged to convert a first part of said input alternating current into a first output alternating current; a second transformer (4b) configured to convert a second portion of the input alternating current into a second output alternating current, wherein the second transformer is connected to the first Transformers connected in parallel on the input side; a comparator (6) set up to compare a quantity characterizing the first output alternating current with a quantity characterizing the second output alternating current and to determine a comparison value based thereon and a signal unit (10) configured to output a signal based on the comparison value. Furthermore, the invention comprises a method for converting an input alternating current and a computer program for implementing the method.

Description

technical field [0001] The invention relates to a device and a method for switching an alternating current, as well as a computing device and a computer program for carrying out the method according to the invention. Background technique [0002] In many cases, in order to provide an alternating voltage or an alternating current or to convert an alternating voltage and / or an alternating current, it is often possible to use a combination of several transformers which are connected in parallel in a switching circuit. This can be used, for example, to feed the welding spot with welding current via a plurality of parallel branches, wherein each branch can have its own transformer, for example. [0003] If, for example, damage or disturbances occur in the corresponding branch, a restricted operation of a branch of the parallel branches or even a branch of the parallel branches may occur under certain circumstances. The failure of the road. Especially if the parallel branches or...

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Problems solved by technology

[0003] If, for example, damage or disturbances occur in the corresponding branch, a restricted operation of a branch of the parallel branches or even a branch of the parallel branches may occur under certain circumstances. failure of the road

Especially if the parallel branches or transformers are supplied with alternating voltage and alternating current by inverters, this can result in the remaining parallel branches not directly being damaged or disturbed Continuation of operation without assistance via disturbed or damaged branches

In this case, the failure of one of the parallel branches can lead to a considerable increase in the load in the remaining branches and, in the worst case, to the failure of other branches of the parallel branches.

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