| 摘要 |
AC arc welding machine by remote control including a TR without a movable ironcore reactor; a constant voltage circuit part connected to AC power through a potential transformer and supplying controlled power to each circuit part; a phase control circuit part serially connected to an input terminal of the TR and automatically controlling a phase angle of non-contact devices; a voltage detecting circuit part connected to an output terminal of the TR and detecting an output voltage of the output terminal; a constant current/voltage controlled circuit part connected to the voltage detecting circuit part, maintaining a current value by a current controlled variable resistor, and stabilizing an output voltage of the TR through a condenser; a current detecting circuit part connected through a current sensor disposed on the output welding line of the TR and consisting of a plurality of amplifiers; and an automatic circuit part connected to the current detecting circuit part.
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