Welding transformer

Definition transformer: The transformer is a stationary converter through which an alternating current of a certain voltage and amperage is transformed (converted). It consists of copper windings and, depending on the design, a core or jacket of laminated iron sheets.

A distinction is made between the primary and secondary sides. The primary side is supplied with an alternating current. This creates an alternating force field, which also induces a voltage in the magnetically coupled secondary side. Depending on the transmission ratio (number of primary windings to number of secondary windings), the secondary currents or voltages are set.

A transformation ratio of 50 means, for example, that the transformer provides 10 volts on the secondary side for a primary voltage of 500 volts. The current behaves accordingly: 20,000 amperes on the secondary side require 400 amperes on the primary side.

Theoretically, primary and secondary power are equal. Due to magnetisation and ohmic losses, the secondary power is naturally smaller.

The medium frequency transformers offered by HWH are characterised by low internal resistance and thus low internal losses and have an integrated diode package for rectifying the secondary voltage in order to have a clean and smooth DC voltage available at the welding point.