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                        The basic composition diagram of arc welding inverters is as showed in the below figure, and its main composition and functions are as below:






                         There are 3 kinds of major loop’s topological graph, and the structures and component usage are as below respectively:




 



                          Two-transistor forward


Circuit structure

Serial number

Performance requirement

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AC/DC

Bridge heap

600V/15A-25A


DC/AC

Fast recovery diode D1  D2

600V/8A-30A

WDP8S60P   WDP10S60    WDP8S60    WDP8S60H

DC/AC

IGBT  Q1   Q2

600V/30A-80A

WGA40G60    WGW40G60W

AC/DC

Fast recovery diode D3  D4

300V/30A-80A

WDW60DK30B    WDW80S30B


 




                          Half-bridge inverter


Circuit structure

Serial number

Performance requirement

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AC/DC

Bridge heap

600V/15A-60A


DC/AC

IGBT Q1  Q2

600V/30A-80A

WGA40G60    WGW40G60W

AC/DC

Fast recovery diode D1  D2

300V-400V/30A-80A

WDW60DK30B   WDW80S30B   WDW80DK40B


 



                         Full-bridge inverter


Circuit structure

Serial number

Performance requirement

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AC/DC

Bridge heap

600V-1200V/15A-60A


DC/AC

IGBT/MosFET Q1  Q2

600V-1200V/9A-80A

WGA40G60   WGW40G60W   WGW15G120W 

WGW20G120W   WGW30G120W   WGW40G120W 

K2611B  K2611   K2698B  K2698  K2837B  K2837   K2611S

AC/DC

Fast recovery diode D1  D2

300V-400V/20A-80A

WSAD92-02    WDW60DK30B    WDW80S30B  

 WDW80DK40B



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