| 摘要 |
FIELD: welding jobs. ^ SUBSTANCE: invention relates to welding, in particular to welding arc power supply and can be used in welding in the field conditions. The stator winding of power supply asynchronous generator (1) is connected with excitation capacitors (2) and rectifier (3). The negative terminal of the latter is connected in series with one terminal of molecular power accumulator (10) of the first (12) and second (13) additional capacitors, and with common point of power component (8), for example, IGBT transistor of electronic key with control circuit (9). The positive terminal of rectifier (3) is connected with the other terminal of aforesaid molecular power accumulator and, via throttle (11), with the other terminal of the first additional capacitor (12) and with the first terminal of primary winding (5) of isolation transformer (4) and cathode of bridge diode (15). Note that the said positive terminal of rectifier (3) is connected, via switch (14), with the second terminal of second additional capacitor (13). The second output of primary (5) of isolation transformer (4) is connected with the anode of bridge diode (15) and the input of power element (8). Two secondary outputs (6) are connected, via HF diodes (16), with welding electrodes (17). Note that medium point (7) of secondary winding (6) of isolation transformer (4) is also connected to welding electrodes (17). ^ EFFECT: reduced weight of isolation transformer, stable operation in welding electrode short-circuit conditions, higher reliability of power supply. ^ 1 dwg |
