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-
sure size
Drive type
High Voltage @ 750 V DC, f
s
= 5 kHz
Low Voltage @ max current, f
s
= 5 kHz
I
out
nominal [A] Filter selection
I
out
max [A] Filter selection
FR4
NXI_0004 5 < 4.8
LDC-0010-6-0-Axx
8
LDC-0010-6-0-Axx
NXI_0009 5 < 10
18
NXI_0012 5 < 13.4
24
FR6
NXI_0016
< 18
LDC-0010-6-0-Axx
32
LDC-0020-5-0-Axx
NXI_0022 5 < 26
44
NXI_0031 5 < 35
LDC-0020-5-0-Axx
62
NXI_0038 5 < 43
76
LDC-0030-6-0-Axx
NXI_0045 5 < 51
90
FR7
NXI_0061 5 < 69
LDC-0030-6-0-Axx
122
LDC-0050-6-0-Axx
NXI_0072 5 < 82
144
NXI_0087 5 < 100
LDC-0050-6-0-Axx
174
LDC-0092-5-0-Axx
NXI_0105 5 < 121
210
FR8
NXI_0140 5 < 161
LDC-0092-5-0-Axx
280
FI9
NXI_0168 5 < 196
336
LDC-0170-6-0-Axx
NXI_0205 5 < 239
410
NXI_0261 5 < 304
LDC-0170-6-0-Axx
500
NXI_0300 5 < 350
500
FI10
NXI_0385 5 < 454
770
LDC-0270-5-0-Axx
NXI_0460 5 < 542
LDC-0270-5-0-Axx
920
LDC-0420-5-0-Axx or LDC-0400-6-0-Bxx
NXI_0520 5 < 613
930
FI12
NXI_0590 5 < 695
2 x LDC-0170-6-0-Axx 1180
2 x LDC-0270-5-0-Axx
NXI_0650 5 < 766
1300
NXI_0730 5 < 870
1460
NXI_0820 5 < 977
1640
AJ377845348678en-000101 / 172F4785 | 9
Danfoss A/S © 2023.01
Selection
DC Filters
Design Guide
