FIELD: welding apparatuses in different branches of industry, namely method for controlling welding current source with resonance circuit.
SUBSTANCE: method is used for controlling welding current source 2 with resonance circuit 27 by means of control device 4. Bridge circuit 28 provides power supply to user, namely to welding process, from power source 29. In order to control separate switching members 32 - 35 of bridge circuit 28, preliminarily set switching conditions are maintained. At standard mode device 4 controls bridge circuit 28 according to preset switching conditions following one after another. When change of resistance of user side is detected, device 4 realizes special operation mode at resonance frequency of resonance circuit 27, and bridge circuit is controlled according to switching conditions designed for special mode.
EFFECT: possibility for realizing outlet characteristics providing at comparatively small current value high outlet voltage for sustaining electric arc or for igniting it.
17 cl, 12 dwg
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