Control system of steel bar electroslag pressure welder

The utility model discloses a control system of a steel bar electroslag pressure welder. The control system of the steel bar electroslag pressure welder comprises a virtual voltage circuit, a short-circuit detection circuit, a power control circuit and a control circuit; the virtual voltage circuit is in control connection with the output end of the welder, outputs virtual voltage at the output end of the welder all the time, and decreases the virtual voltage to be 0 volt when an output loop of the welder short-circuits; the short-circuit detection circuit is connected with the output end of the welder, detects voltage and current output by the welder in real time, and judges whether the output loop of the welder short-circuits or not according to the voltage and current; the power control circuit is in control connection with a welding power source in the steel bar electroslag pressure welder and provides energy for electric arcs when steel bars are welded; the control circuit is in control connection with the virtual voltage circuit, the short-circuit detection circuit and the power control circuit and coordinates the virtual voltage circuit, the short-circuit detection circuit and the power control circuit to work in a matched mode to achieve the steel bar electroslag pressure welding process without contact sparks. According to the scheme, the control system of the steel bar electroslag pressure welder is simple in structure, easy to implement and capable of achieving the steel bar electroslag pressure welding process without contact sparks.