Theory of Operation .............................................................................................................Section E
Block Logic Diagram ...................................................................................................................E-1
General Description ....................................................................................................................E-2
Input Voltage and Precharge ......................................................................................................E-3
Switch Boards and Main Transformer.........................................................................................E-4
DC Bus Board, Power Board, Feed Head Board, Gateway Board
and Voltage Sense Board ...........................................................................................................E-5
Power Wave Communications Diagram .....................................................................................E-6
Control Board..............................................................................................................................E-7
Output Rectifier, Output Choke and STT Chopper Board ..........................................................E-8
Thermal Protection, Protective Circuits, Over Current Protection
and Under/Over Voltage Protection ............................................................................................E-9
General Description of STT (Surface Tension Transfer) Process.............................................E-10
Insulated Gate Bipolar Transistor (IGBT) Operation.................................................................E-11
Pulse Width Modulation ............................................................................................................E-12
Section E-1 Section E-1
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
POWER WAVE 455M/MSTT
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