Welding Machine Equipment

1. Application Scenarios

Welding equipment (inverter welding machine) is used for metal welding, including manual welding, argon arc welding (TIG), gas shielded welding (MIG/MAG), plasma cutting, etc., with a power range of 2kW-50kW.

2. The Role of the Product in the System

Product Category	System Function
Three-phase rectifier bridge	Rectify three-phase AC into high-voltage DC bus (approximately 540V)
Fast recovery diode	Continuous current diode and output rectifier diode of IGBT inverter bridge
Ultra fast recovery rectifier bridge	Output side high current rectification module

3. Recommended Product Model

Product Category	Recommended Series/Model	Key Parameters
Three-phase rectifier bridge	GBJ/KBJ series (35A – 100A/1200V – 1600V)	Strong surge resistance capability
Fast recovery diode	FRxx series (600V-1200V)	Trr < 80ns， Suitable for high-frequency inverters
Ultra fast recovery rectifier bridge	High current fast recovery bridge module (50A – 200A)	Output side high current rectification

4. AC/DC Module Application

● The front-end AC/DC adopts a three-phase rectifier bridge and a large capacitor filter to provide a stable DC bus for the inverter stage

● The selection of rectifier bridge should consider power grid fluctuations and surges

5. Application of PFC Circuit

● High power welding machines (>10kW) require an additional PFC level to meet harmonic requirements (IEC 61000-3-12)

● Recommend Vienna PFC or three-phase PFC, using SiC diode+IGBT

6. Common Customer Needs

Demand	Our Response
The welding machine has unstable arc starting	Recommend fast recovery of output rectifier tubes to improve dynamic response
High temporary load rate (60% -100%) is required	Recommend low thermal resistance packaging to provide thermal simulation support
To meet the national energy efficiency standards	Provide low loss component solutions to improve overall energy efficiency
To meet the national energy efficiency standards	Provide corresponding authentication documents