Control device of inverter transferred arc type cutting machine

The invention discloses a control device of an inverter transferred arc type cutting machine. The control device comprises an electromagnetic induction collecting module, a voltage switching circuit, a variable reference voltage circuit and a fixed reference voltage circuit. The electromagnetic induction collecting module is used for guiding currents on an arc lead to generate electromagnetic induction through a cutting gun of the inverter transferred arc type cutting machine. The variable reference voltage circuit is used for outputting variable reference voltages. The fixed reference voltage circuit is used for outputting fixed reference voltages. The fixed reference voltages and the variable reference voltages are used for controlling the pulse widths of PWM signals output by an inverter controller of the inverter transferred arc type cutting machine. The voltage switching circuit comprises a reed pipe which is switched on or switched off according to the intensity of electromagnetic induction. The control device lowers the manufacturing cost of the inverter transferred arc type cutting machine, and enables a switching control circuit to be greatly simplified.