REMOTE CONTROL SYSTEM OF A.C ARC WELDING M/C

摘要

The remote cotroller for controlling the transformer placed at long distance from the working position includes a polarity discriminator(13) sensing the directional characteristic of the output impedance of a magnetic amplifier(11) having a rectangular saturation characteristic, a pair of SCR. driving circuit(15) driving a corresponding relay(17), and a motor(12) varying the connection of the transformer terminals to control the are current.