POWER SOURCE FOR ELECTRIC ARC WELDING Russian patent published in 2005 - IPC

FIELD: electric welding AC apparatuses with intermittent power supply of electric arc.

SUBSTANCE: primary winding of welding transformer is connected in series with thyristors connected in parallel and mutually opposite and provided with control unit. Circuit of connected in series capacitor and inductor is connected in parallel with said thyristors. Inductor is magnetically coupled with additional winding connected to secondary winding of welding transformer. Inductor and its additional winding are in the form of separate transformer in which inductor is primary winding and additional winding is secondary one. Throttle is connected in series with primary winding of welding transformer. One of additional capacitors is connected in parallel with thyristors and with primary winding of transformer. Secondary winding of separate transformer and connected in series with it other additional capacitor are connected in parallel with secondary winding of welding transformer. Electric current pickup is connected in series with circuit of secondary winding of welding transformer. Outlet of said pickup is connected with control unit of thyristors.

EFFECT: enhanced operational characteristics of power source.

1 dwg