7.3 Cooling System Requirements
Table 9: Requirements for Air Cooling
Cooling type
Requirement
Natural convection
Sufficient airflow through inductors, when mounted on top of each other.
Forced air cooling
Nominal airflow 3 m/s.
External fan/blower is required.
Table 10: Requirements for Liquid Cooling
Requirement
Specification
Coolant flow rate
6 l/min
Maximum operating system pressure
6 bar
Maximum pressure
Maximum peak 30 bar/60 s according to UL61800-5-1
Pressure drop (at flow rate 6 l/min)
0.2 bar
Nominal temperature of coolant
5–45 °C
Maximum temperature of coolant
70 °C
Allowed coolants
Drinking water according to 98/83/EY
Demineralized water
Non-corrosive
Propylene glycol or ethylene glycol mixture with the preceding water qualities
Cooling system connections
Following the drive system connections
Cooling system materials
Stainless steel: AISI304, AISI316
Aluminum: Corrosion resistant
Glycol-tolerant plastics
Not allowed:
Copper, brass, PVC
7.4 Technical Data
Some of the DC filters with rated voltage 750 V DC can be used at nominal 1025 V DC system voltage due to the high impedance
value. See the tables in
Table 11: Technical Data for Air-cooled DC Filters
Code Num-
ber
Filter type code
Manufacturer part
code
Rated
voltage
[V DC]
Cooling Nominal
current
at 50 °C
[A]
Power
loss at
20 °C
[W]
Protec-
tion
rating
Switching
frequency
[kHz]
181B5954
LDC-0010-6-0-APt 40277-SET-PT100
1025
AN
10
60
IP00
5
181B5955
LDC-0010-6-0-ATr 40277-SET-THER-
MIK
181B5956
LDC-0020-5-0-APt 40260-SET-PT100
750
AN
20
110
IP00
5
181B5957
LDC-0020-5-0-ATr 40260-SET-THER-
MIK
181B5958
LDC-0030-6-0-APt 56606-SET-PT100
1025
AN
30
200
IP00
5
AJ377845348678en-000101 / 172F4785
18 | Danfoss A/S © 2023.01
Specifications
DC Filters
Design Guide