ESAB Fabricator 181i, Service Manual

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ESAB FABRICATOR 181i
Manual 0-5449 5-1 THEORY OF OPERATION
5.01 Inverter Design
What does the word inverter mean?
The term inverter refers to the ability to change DC power into AC. Inverter power supplies immediately rectify the incoming AC to DC,
and then the transistors create a higher frequency AC. The higher frequency AC then goes on to a much smaller main transformer than
in a conventional power supply. The AC is then rectified to extremely smooth DC. The diagram to the below shows the basic electrical
wiring of a DC output inverter power supply.
Inverter Technology - Summary
Rectifier Filter IGBT Transformer Rectifier Inductor
AC -50/60Hz DC -Rippled DC -Smooth AC -23K Hz AC -23K Hz DC - Rippled DC -Smooth
High Voltage High Voltage High voltage High Voltage Low Voltage Low Voltage Low Voltage
Low Amperage Low Amperage Low Amperage Low Amperage High Amperage High Amperage High Amperage
Art # A-09846
SECTION 5:
THEORY OF OPERATION