The transformation sequence can be simply expressed as: power frequency AC (through rectification and filtering) → DC (through inversion) → intermediate frequency AC (voltage reduction, rectification and filtering) → DC. The three-phase or single-phase 50Hz power frequency alternating current is rectified and filtered to obtain a smooth DC current. The inverter circuit composed of IGBT or FET changes the DC current into an AC current of 15~100kHz. After the intermediate frequency main transformer depressurizes, it is rectified and filtered again to obtain a stable DC output welding current (or inverter again to output AC current of the required frequency). The control circuit of inverter welding and cutting equipment is composed of a given circuit and a drive circuit. By processing the feedback of voltage and current signals, the whole machine is controlled circularly. The control technology with PWM as the core is adopted, so as to obtain the constant current characteristics of fast pulse width modulation and excellent welding and cutting process effects

Scope of application:

Single phase input 220VAC

Three phase input 380VAC

Mining welder 690VAC

Expandable application projects:

Plasma cutting machine, inverter argon arc welding machine, high-power DC power supply.

IGBT part:

Packaging	Topology	650V	1200V	1700V
TO-247	single	DKG75H120TDH	DKG25H120TDH
			DKG30H135TDH
			DKG40H120TDH
			DKG40H120UDH
TO-3P	single		DKG25N120TDH
			DKG30N135TDH
			DKG40N120TDH
ML_34mm ultra-thin	half-bridge	DKG75ML65BUH1	DKG75ML120BUH1
			DKG100ML120BUH1
MA_34mm	half-bridge	DKG75MA65BUH1	DKG75MA120BUH1	DKG100MA170BTH1
			DKG100MA120BUH1
			DKG150MA120BUH1
MB_62mm	half-bridge		DKG150MB120BUH1	DKG200MB170BTH1
			DKG200MB120BUH1
			DKG300MB120BUH1

Output auxiliary circuit:
Name	Parameter range
Rectifier bridge	2A~35A，50V~1000V
rectifier diode	0.2A~10A，50V~5000V
Fast recovery diode	0.2A~6A，50V~5000V
Ultra fast recovery diode	1A~6A，50V~1000V
Power diode	7A~30A，20V~150V