Lincoln Electric POWER WAVE SVM135-B Service Manual page 51

SECTION E-1
Theory of Operation ................................................................................................................................. Section E
Modular Inverter Based Welding System...........................................................................................
System Diagram A .............................................................................................................................
System Diagram B .............................................................................................................................
System Diagram C.............................................................................................................................
Power Source General Description....................................................................................................
Input Voltage and Precharge .............................................................................................................
Switch Boards and Main Transformer................................................................................................
Control Board.....................................................................................................................................
Output Rectifier and Choke................................................................................................................
Thermal Protection.............................................................................................................................
Protective Circuits ..............................................................................................................................
Over Current Protection .....................................................................................................................
Under/Over Voltage Protection ..........................................................................................................
Insulated Gate Bipolar Transistor (IGBT) Operation..........................................................................
Pulse Width Modulation .....................................................................................................................
Minimum Output ..........................................................................................................................
Maximum Output .........................................................................................................................
Control Box (User Interface) ..............................................................................................................
Power Feed 10 Feed Head................................................................................................................
THEORY OF OPERATION
TABLE OF CONTENTS
-THEORY OF OPERATION SECTION-
POWER WAVE 455/POWER FEED 10
SECTION E-1
E-2
E-2
E-3
E-4
E-5
E-5
E-6
E-7
E-8
E-9
E-9
E-9
E-9
E-10
E-11
E-11
E-11
E-12
E-13