Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
Section E-1 Section E-1
SQUARE WAVE TIG 275
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
Theory of Operation .............................................................................................................Section E
General Description ....................................................................................................................E-2
Input Power Circuit......................................................................................................................E-2
Output Rectification, Control Board and Feedback ....................................................................E-3
High Voltage/High Frequency Circuit..........................................................................................E-4
DC Welding Output .....................................................................................................................E-5
AC Welding Output .....................................................................................................................E-6
SCR Operation............................................................................................................................E-7
Protective Circuits .......................................................................................................................E-8
Thermal Protection ...............................................................................................................E-8
Overload Protection..............................................................................................................E-8
