Derating; Derating Of Switching Frequency, Inu; Derating Of Coolant Temperature; Derating Of Voltage Imbalance, Afe/Gc - Danfoss iC7 Series Design Manual

Design Guide | iC7 Series Liquid-cooled System Modules

Derating

7.16

Derating of Switching Frequency, INU

7.16.1
The inverter unit can be used without derating up to 3 kHz. For switching frequencies higher than 3 kHz, current must be derated
according to the diagram.
I/I [% ]
N
100
95
90
85
80
75
70
65
60
2 3
Figure 92: Switching Frequency Derating

Derating of Coolant Temperature

7.16.2
The liquid-cooled system modules can be used without derating up to 38 °C (100 °F) or 45 °C (113 °F), depending on the current rating.
For higher coolant temperatures, current must be derated 1%/1 °C (1%/1.8 °F) as shown in the following diagram.
I/I [% ]
N
100
95
90
85
35 40
Figure 93: Coolant Temperature Derating

Derating of Voltage Imbalance, AFE/GC

7.16.3
AFE and grid converter units can be used without derating up to 3%. For voltage imbalances higher than 3%, current must be derated
according to the diagram.
90
| Danfoss Drives Oy © 2024.03
4 5 6
45 50 55
7 8 9
60 65 70
f [kHz]
10
T [°C]
AJ475942178716en-000101 / 172K2848A