Welding or plasma cutting device and method for operation a welding or plasma cutting device

摘要

Welding or plasma cutting device comprises a commutation quadrapole having a decoupling device (D3) for decoupling the rectifier starting voltage (VB) from the intermediate circuit voltage (V0); an energy storage device (LR, SR) controlled by a controller (ST) and a balancing path. Preferred Features: The decoupling device has a decoupling diode. The energy storage device is formed by a switch made of a controlled semiconductor switch and an inductor.