Igbt - Kemppi Minarc Evo 150 Service Manual

Service manual Minarc Evo 150 and 180
PFC input
Diode group
Series diodes forward bias
IGBT diodes reverse bias
Series diodes reverse bias
IGBT diodes forward bias

4.3.1.2. IGBT

Mains supply voltage must
IGBT module can be tested by a multimeter when using the diode tester function. The module holds four
diodes and if IGBT is damaged, in many cases these will be defective. They can be measured only in
pairs if main transformer primary is connected, if it is removed all the four diodes can be measured
separately.
19
Kemppi Oy
DC-link
GND
Positive test lead
PFC input
PFC input
DC-link positive
GND
not
be connected during the IGBT module diode measuring.
Version 1.3
Negative test lead Result
DC-link positive 0,2-0,5VDC
GND No value
PFC input No value
PFC input 0,3-0,7VDC
30.9.2015