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Section E-1 Section E-1
PRO-CUT 80
Theory of Operation .............................................................................................................Section E
General Description ....................................................................................................................E-2
Input Line Voltage, Contactor and Main Transformer.................................................................E-2
Precharge and Protection ...........................................................................................................E-3
Main Transformer ........................................................................................................................E-4
Output Board and Torch .............................................................................................................E-5
Control and Display Boards........................................................................................................E-6
Protection Circuits ......................................................................................................................E-7
Overload Protection..............................................................................................................E-7
Thermal Protection ...............................................................................................................E-7
Insulated Gate Bipolar Transistor (IGBT) Operation ...................................................................E-8
Pulse Width Modulation (PWM) ..................................................................................................E-9
Minimum Output...................................................................................................................E-9
Maximum Output..................................................................................................................E-9
TABLE OF CONTENTS
-THEORY OF OPERATION SECTION-
