Lenze ECSCAxxx - Manual (Page 44)

Technical data
Current characteristics
Increased continuous current depending on the control factor
3
l
44 EDBCSXA064 EN 3.2
3.3 Current characteristics
3.3.1 Increased continuous current depending on the control factor
In the lower speed range ˘ the motor does not need the full motor voltage ˘ particularly
the more powerful ECS axis modules can be permanently operated with increased output
current (cp. continuous current I
0,eff
^ 42).
27.0
23.0
16.0
8.0
4.0
0.0
5.0
10.0
15.0
20.0
25.0
20.0
17.0
12.7
8.0
4.0
30.0
0 % 50 % 100 %
ECSxS/P/M/A048
ECSxS/P/M/A032
ECSxS/P/M/A016
ECSxS/P/M/A008
ECSxS/P/M/A004 2.0 2.0
I [A]
U / U
Mot max
ECSxS/P/M/A064
I [A]
0
I [A]
N
ECSXA002
Fig. 3−1 Continuous device current, depending on the output voltage for U
mains
£ 400 V at 4 kHz
I
r
Rated output current of the axis module
U
Mot_n
Actual controller output voltage
U
Mot_max
0.9 x current mains voltage
The permissible continuous current depends on the control factor of the power output
stages, approximately on the ratio of the motor voltage output in the operating point
(U
Mot_n
) to the maximum possible output voltage (U
Mot_max
). Due to voltage drops across
the components involved at rated load and a control margin, U
Mot_max
can be estimated
with 90 % of the mains voltage.
I
Tip!
The operating threshold of the device utilisation monitoring (I x t) function is
automatically adapted to the continuous device current which changes
depending on the output voltage (see fig.).