Thermal Protection - Lincoln Electric PRO-CUT 60 SVM104-A Service Manual

- THEORY OF OPERATION SECTION -
Theory of Operation Section ...................................................................... Section E
Power Supply Operation .............................................................................E-1 - E-4
Input Line Voltage and Main Transformer.......................................................E-1
Output Rectification.........................................................................................E-2
High Voltage / High Frequency and By-Pass Circuit ......................................E-3
Pilot Arc ...........................................................................................................E-4
Transistor Switching Operation.............................................................................E-5
PWM Operation and Thermal Protection ............................................................ E-6
TABLE OF CONTENTS
FIGURE E.1 Block Logic Diagram
Section E
Page
PRO-CUT 60