ESAB Aristo Mig 3001i Service Manual page 5

Design structure of the power source
The power source is transistor-controlled, operating on the inverter principle. It consists of a
number of function modules, as shown in the block diagram below. Each module has a
module number, which is always included as the first part of the name/identification of
components in the module.
The modules have the following main functions:
1 MMC module
The control panel and display.
2 Mains module
Mains interference suppressor, mains switch, auxiliary transformer.
10 TIG module
Comprises all TIG functions.
15 Power module
This module is a dual forward inverter, operating at a switching frequency of 2 x 40 kHz.
IGBT transistors are used as the switching elements. All power semiconductors are built
into modules.
20 Processor board module (controller module)
This is the controller board, 20AP1, with a microprocessor, that monitors and controls the
voltage and current.
Block diagram of the Mig 3001i.
S0740 800 196/E101019/P76
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