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DC Filters
Design Guide
4 Selection
4.1 Selecting the DC Filter
Two operating conditions are given for filter selection in the tables, one at high voltage and another at low voltage. The high volt-
age refers to the maximum storage voltage in the application. The low voltage is the voltage level at 50% duty cycle of the drive,
which is thermally the worst case condition for the DC filter.
The filter selection can differ depending on the energy storage requirements. The selections in the tables are recommendations.
The selection is typically made according to the maximum output current at low voltage.
4.2 DC Filter Selection, Air-cooling
Table 3: DC Filter Selection for Air-cooled 500 V Drives According to Energy Storage Requirements
Drive enclo-
Drive type
sure size
FR4
NXI_0004 5
NXI_0009 5
NXI_0012 5
FR6
NXI_0016
NXI_0022 5
NXI_0031 5
NXI_0038 5
NXI_0045 5
FR7
NXI_0061 5
NXI_0072 5
NXI_0087 5
NXI_0105 5
FR8
NXI_0140 5
FI9
NXI_0168 5
NXI_0205 5
NXI_0261 5
NXI_0300 5
FI10
NXI_0385 5
NXI_0460 5
NXI_0520 5
FI12
NXI_0590 5
NXI_0650 5
NXI_0730 5
NXI_0820 5
Danfoss A/S © 2023.01
High Voltage @ 750 V DC, f
s
I
nominal [A]
Filter selection
out
< 4.8
LDC-0010-6-0-Axx
< 10
< 13.4
< 18
LDC-0010-6-0-Axx
< 26
< 35
LDC-0020-5-0-Axx
< 43
< 51
< 69
LDC-0030-6-0-Axx
< 82
< 100
LDC-0050-6-0-Axx
< 121
< 161
LDC-0092-5-0-Axx
< 196
< 239
< 304
LDC-0170-6-0-Axx
< 350
< 454
< 542
LDC-0270-5-0-Axx
< 613
< 695
2 x LDC-0170-6-0-Axx
< 766
< 870
< 977
= 5 kHz
Low Voltage @ max current, f
I
max [A]
Filter selection
out
8
LDC-0010-6-0-Axx
18
24
32
LDC-0020-5-0-Axx
44
62
76
LDC-0030-6-0-Axx
90
122
LDC-0050-6-0-Axx
144
174
LDC-0092-5-0-Axx
210
280
336
LDC-0170-6-0-Axx
410
500
500
770
LDC-0270-5-0-Axx
920
LDC-0420-5-0-Axx or LDC-0400-6-0-Bxx
930
1180
2 x LDC-0270-5-0-Axx
1300
1460
1640
Selection
= 5 kHz
s
AJ377845348678en-000101 / 172F4785 | 9
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