Nidec Unidrive M600 Series - Page 75

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Unidrive M Regen Design Guide 75
Issue Number: 4
4.7.2 Combined Regen input filters (combi filter)
The combi filter is a simplified solution consisting of a combined EMC filter and switching frequency filter. The combined filter is shown in the power
configuration below (single Regen Unidrive M).
Figure 4-20 Unidrive M Regen input combi filter arrangement
The combi filter combines the standard EMC filter, SFF capacitor(s) and SFF inductor into a single package. With the combi filter the Regen system
front end has a total of 2 major components (Regen inductor + Combi filter) where as previously this would have required 4 components
(Regen inductor + SFF capacitor(s) + SFF inductor + EMC filter).
The range of combi filters covered in this section are available from Schaffner, the filters are not stocked by the supplier of the drive.
PE
UVW
L1 L2 L3 PE
L1
L2
L3
PE
L2
K2
F1 F2 F3
K1
V1
V2
V3
V4
V5 V6
L1 L2 L3
L1 L2 L3
L1 L2 L3
L1 L2 L3
Aux.2
AC Supply
Power-up
Connections
AC Supply
Connections
Aux.1
Regen
Inductor
Unidrive M
Regen
Where fitted the thermal switch must be configured
open the main supply contactorto
in the event of a thermal overload.
Combi filter
(EMC and Switching
Frequency filter)
F4
F5
F6
K2
V supply
NOTE
Combi filters listed in Table 3-23 Combi filter selection on page 39 are equipped with an internal thermal switch to prevent the EMC filter
inductor from overheating. The thermal switch must be configured to open the main supply contactor in the event of a thermal overload.
CAUTION