Kemppi MLS 2300 ACDC Service Manual

16
PFC card Z004
Functions and connectors:
The PFC -card Z004 includes these operational blocks:
- EMI -filter
- Net connecting transient damping
- Primary rectifier
- PFC -power stage
- PFC -power stage control
- Net overvoltage watch
- Auxiliary voltages developing
- EMI -filter reduces the electromagnetic disturbances conducting to the net (EN50199).
- The net connecting transient is damped by the PTC-resistor R23 and relay K1 together. The rectifier
unit V1 rectifies the net voltage to DC, which can fluctuate between + 260…380 V. Power
supply to the power supply card A002 via connectors X13 and X14.
- PFC’s power stage (boost converter) increases the full-wave rectified net voltage up to +400 V DC and
forces the net current into sinus form.
- Note. IGBT -transistors V4…V7 are insulated from the heat sink! Diodes V2 and V3 are not insulated, so
diode cathodes and heat sink share the same potential approx. + 400 V!
X5
X7
X15
X8
X6
X3
X2
X1
X14
X13
X10
X9
X12
X11

Kemppi MLS 2300 ACDC Specifications

General

Brand	Kemppi
Model	MLS 2300 ACDC
Category	Welding System
Language	English