| 摘要 |
PURPOSE:To supply feedback current to welding load when the supply of pulse current is interrupted and to perform stable welding by providing a DC reactor and a winding for feedback in the power supply circuit for supplying the base current and the pulse current to the welding load. CONSTITUTION:A DC reactor 7 provided with a winding 7a for base and a winding 7b for pulses is provided between a DC power source 4 and welding load 6, that is, in the power supply circuit for base current Ib and pulse current Ip and a winding 8 for feedback coupled magnetically to the reactor 7 and a diode 9 and a resistor 10 for supplying the feedback current Ir from the winding 8 to the load 6 are provided so that the feedback current Ir is passed to the load 6 right after the interruption of the supply of the pulse current Ip whereby an arc 6c is stabilized. |
