Danfoss iC2-Micro Series - Automatic Derating

120
100
80
60
40
20
0
0
2
4 6 8 10 12 14 16 18
e30bv166.10
I
out
(%)
f
switch
(kHz)
40 °C (104 °F)
50 °C (122 °F)
55 °C (131 °F)
Figure 24: Derating of Output Current Versus Switching Frequency (MA03a 3x380–480VAC)
120
100
80
60
40
20
0
0
2
4 6 8 10 12 14 16 18
e30bv167.10
I
out
(%)
f
switch
(kHz)
40 °C (104 °F)
50 °C (122 °F)
55 °C (131 °F)
Figure 25: Derating of Output Current Versus Switching Frequency (MA04a 3x380–480VAC)
120
100
80
60
40
20
0
0
2
4
6
8 10 12 14 16 18
e30bl439.10
I
out
(%)
f
switch
(kHz)
40 °C (104 °F)
50 °C (122 °F)
55 °C (131 °F)
Figure 26: Derating of Output Current Versus Switching Frequency (MA05a 3x380–480VAC)
4.9.3 Automatic Derating
To ensure the performance at critical stages, the drive checks for the following critical levels constantly and adjusts the switching
frequency automatically.
l Critical high temperature on the heat sink.
l High motor load.
l Low motor speed.
l Protection signals (overvoltage/undervoltage, overcurrent, ground fault, and short circuit) are triggered.
56 | Danfoss A/S © 2024.08 AJ402315027937en-000401 / 130R1239
Design Guide | iC2-Micro Frequency Converters Specifications