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System Manual – MOVIDRIVE® compact Drive Inverters
4
Overload capacity of the inverter
Project Planning
•
Move vertically downwards and then read the minimum low-load time t
2
→
t
2
= 0.13 s
All times t
2
to the right of the point of intersection with I
out2
are permissible (
√
); all times
t
2
to the left are not (!).
According to the diagram, the overload capacity is given. In addition to the diagram, you
now have to check that the permitted mean inverter output current I
out RMS
is not
exceeded:
The permitted mean inverter output current is I
out RMS
≤
65 % I
D
. In the specified load
cycle, I
out RMS
= 63.08 % I
D
. Therefore, the load cycle is permitted.
MC_4_A, sizes 1-5
overload capacity
at 400 V / 25 °C
Cycle frequency f
PWM
= 8 kHz:
The permitted mean inverter output current is I
out RMS
≤
79 % I
D
.
05574AXX
56749AXX
Figure 72: Short-term overload capacity at f
PWM
= 8 kHz (400 V / 25 °C)
1
0.8
0.6
0.4
0.2
0
0.2
0.4
0.6
0.8
1
t1 [s]
t2 [s]
I
out 2
I
out 1
V
1
= 3 x AC 400 V
ϑ
amb
= 25 °C
f
PWM
(P860 / P861) = 8 kHz
I
out RMS
≤
79 % I
D
120 %
I
D
130 % I
D
60 % I
D
40 % I
D
20 % I
D
0 % I
D
Summary of Contents for MOVIDRIVE compact MCH41A
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