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E-1
THEORY OF OPERATION
E-1
INVERTEC V250-S
TABLE OF CONTENTS
-THEORY OF OPERATION SECTION-
GENERAL DESCRIPTION...........................................................................................................E-2
INPUT LINE VOLTAGE................................................................................................................E-2
PRE-CHARGE AND PROTECTION ............................................................................................E-3
MAIN TRANSFORMER................................................................................................................E-4
OUTPUT RECTIFICATION AND CONTROL...............................................................................E-5
PROTECTION CIRCUITS............................................................................................................E-6
INSULATED GATE BIPOLAR TRANSISTOR (IGBT) OPERATION............................................E-7
PULSE WIDTH MODULATION (PWM)........................................................................................E-8