Plasma is heated to a high temperature and is highly ionized gas, it will arc power will be transferred to the workpiece, high heat to melting of a workpiece and disallowed, the formation of plasma arc cutting working condition.
The compressed air into the chamber after the torch distribution is formed two plasma gas and auxiliary gas. Gas plasma arc melting metal, various components and auxiliary gas cooling torch and the molten metal has been blown off.
Cutting power supply includes two parts: the main circuit and control circuit, electrical principle: main circuit comprises a contactor, high leakage reactance of the three-phase power transformers, three-phase bridge rectifier, high frequency arc arc suppression coil and a protective element etc.. The external characteristics of the power supply caused by high leakage reactance. The control circuit through the switch button on the torch to finish the whole cutting process：
Pre vent - main circuit power supply - high frequency arc ignition - cutting process - interest arc - stop.
Power supply from the main circuit of the contactor control; gas short pass by the electromagnetic valve control; by the high frequency oscillator control circuit controls the arc ignition and arc is established in the high frequency stop working.
In addition, the control circuit has the following internal lock function: thermal control switch action, stop working.