CIGWELD WELDSKILL 180, Service Manual, Page: 55 / 80

0-5461 8-1 THEORY OF OPERATION
SERVICE MANUAL
180
SECTION 8:
THEORY OF OPERATION
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
240VAC
1ph.
Rectifier Inverter
CT
Transformer
Rectifier
DC DC AC AC AC
Current
Feedback
MCU
User
Controls
Art # A-13062