Igbt Modules D1 Units - Danfoss VLT Series Service Manual

6.17 IGBT Modules D1 Units

1. Remove control card cassette per instructions.
2. Remove input terminal mounting plate per
instructions.
3. Note IGBT gate signal cables connected between
gate drive card connectors MK102 (U), MK103
(V), and MK104 (W) and IGBT module
connectors. These will need to be reconnected in
same locations during reassembly. Units with
brake option will have brake cabling from MK105
in addition. Remove capacitor bank per
instructions.
4. Disconnect gate drive cables at connectors on
IGBT modules.
5. Disconnect cable connected to connector MK100
on high frequency card.
DC input bus bar assembly BB3
(Step 6A)
IGBT output bus bar BB9
(Step 7)
6. Remove high frequency card by removing 2
6A. For units with brake option, DC input bus
6B. For units with brake option, remove bus bars
7. Remove 3 IGBT output bus bars by removing nut
Retaining screw
(Step 6)
Figure 6-16. D1 IGBT Module (1 of 2)
retaining screws and 1 retaining nut.
assembly must be removed to access and
remove bus bars between IGBT bus bar assembly
(see step 10 in Figure 6-15 2 of 3) and brake
IGBT. Remove DC input bus bar assembly per
steps 3 - 5 of SCR/Diode Module Removal (D1
units).
between IGBT bus bar assembly (see step 10 in
Figure 6-15 2 of 3) and brake IGBT by removing
two T25 retaining screws on brake IGBT (not
shown) and two 8mm retaining nuts on IGBT bus
bar assembly (not shown).
(10mm) from stud. Also remove retaining screw
(T30) at other end of IGBT output bus bars (not
shown).
CONTINUED ON NEXT PAGE
High frequency card
Connector MK100
(Step 5)
IGBT module
IGBT output bus bar retaining nut
(Step 7)
VLT is a registered Danfoss trademark
Retaining nut
(Step 6)
Do not remove
(Step 6)
Gate drive cable connectors
(Steps 3 & 4)
6-25