LOW-VOLTAGE PROTECTING CIRCUIT OF AN ARC INVERTER WELDER AND A PROTECTING METHOD THEREOF, CAPABLE OF PREVENTING DAMAGE TO A SYSTEM DUE TO THE DROP OF INPUT VOLTAGE

摘要

PURPOSE: A low-voltage protecting circuit of an arc inverter welder and a protecting method thereof are provided to appropriately control and protect a system according to the change of voltage and output voltage due to the drop of the input voltage.;CONSTITUTION: A low-voltage protecting circuit of an arc inverter welder comprises a first power feeder(1), an AC/DC convertor(2), an output unit(3), an output detecting unit(5), and a controller(4). The first power feeder connects to a power input terminal. The AC/DC convertor generates the power of a pseudo sine wave. The output unit applies high current of high voltage on the load. The output detecting unit detects the output of the output unit and generates output error signals.;COPYRIGHT KIPO 2011