Section 5: Theory Of Operation; Inverter Design - Thermal Arc 181i FABRICATOR Service Manual

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
AC-50/60Hz DC-Rippled
High Voltage High Voltage
Low Amperage Low Amperage Low Amperage Low Amperage
Manual 0-5152
SECTION 5:
THEORY OF OPERATION
Filter IGBT Transformer
DC-Smooth AC-23KHz
High voltage High Voltage
Rectifier
AC-23KHz DC- Rippled
Low Voltage Low Voltage
High Amperage High Amperage
5-1
FABRICATOR 181i
Inductor
DC-Smooth
Low Voltage
High Amperage
Art # A-09846
Theory of Operation