INVERTER POWER SUPPLY SOURCE FOR ELECTRIC ARC WELDING Russian patent published in 2008 - IPC B23K9/09 

FIELD: electricity; technological processes.

SUBSTANCE: primary winding of output step down transformer (PT) is connected according to single-phase circuit. Two parallel branches consist of two serially connected thyristors, between points of anodes and cathodes connection switching capacitor is connected. Secondary winding of PT is connected with its both ends to the inlet of uncontrolled rectifier, and with its middle point - to one of load terminals. Output of uncontrolled rectifier is connected to one end of filter throttle, which is connected to the second load terminal with its other end. One end of PT primary winding is connected to the common point of parallel branches thyristor anodes connection, and the other end - to plus of power supply source. Minus of power supply source is connected to the common point of parallel branches thyristor cathodes connection. In the secondary circuit load and filter throttle are shunted by diode in reverse direction.

EFFECT: reliable operation.

5 dwg