SEW-Eurodrive MOVIDRIVE compact MCH41A, System Manual

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System Manual – MOVIDRIVE® compact Drive Inverters
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Control characteristics
Project Planning
4.2 Control characteristics
Characteristic
features
MOVIDRIVE
®
drive inverters achieve excellent control characteristics thanks to their op-
timally adapted control algorithms. The following characteristic features apply to opera-
tion with four-pole SEW motors and synchronous SEW servomotors.
The following values apply to MOVIDRIVE
®
inverters in combination with motors of the
same power:
The defined control characteristics are maintained in the specified speed range.
Control response The following table gives an example of the differences in the control characteristics of
the MOVIDRIVE
®
compact types MCF and MCV.
Data
• Setpoint speed n
set
= 1000 1/min
• Step change in load
∆
M = 80 % of rated motor torque
• Torsion-free load with mass inertia ratio J
L
/J
M
= 1.8
01762BEN
Figure 56: Features for the control characteristics
MOVIDRIVE
®
compact type
Continuous speed range
n
max
= 3000 1/min
Stationary control accuracy
1)
based on n
max
= 3000 1/min
1) = Deviation of the average speed from speed setpoint
MCF, VFC without encoder 1:200 0.30%
MCV/MCH, VFC with encoder (1024 incr.) 1:800 0.01%
MCV/MCH, CFC with encoder (1024 incr.) 1:3000 0.01%
MCV/MCH, CFC with sin/cos encoder 1:5000 0.01%
MCS, SERVO with resolver > 1:3000 0.01%
MCH, CFC/SERVO with Hiperface
encoder
1:5000 0.01%
t
t
n
M
Transient recovery time
Maximum
speed deviation
Rotational accuracy
Step change in load M = 80%
∆
n
setp
MOVIDRIVE
®
compact type
Transient recovery
time based on the
value of MCF
Max. speed deviation at
∆
M = 80%,
based on n = 3000 1/min
True-running accuracy at
M = const. based on
n = 3000 1/min
MCF, VFC
without encoder
100 % 1.8 %
≤
0.20 %
MCV, VFC with
encoder (1024 incre-
ments)
90 % 1.5 %
≤
0.17 %
MCV, CFC with
encoder (1024 incre-
ments)
35 % 1.0 %
≤
0.07 %
MCV, CFC with
sin/cos encoder
25 % 0.7 %
≤
0.03 %