Siemens SINAMICS G130 Engineering Manual page 216

SINAMICS S120
Engineering Information
Servo control
Induction motor 1PH7/ 1PL6
without
encoder
Chassis format, pulse frequency 2 kHz, closed-loop speed control
250 μs
Controller cycle
Total rise time (rise 21 ms
time + dead time) (20 + 1)
Characteristic 25 Hz
angular frequency
-3 dB
Speed ripple See notes
Speed accuracy 0.1 x f
slip
Typical slip values for standard asynchronous motors
Motor power Slip values
6% of n
< 1 kW
e.g. motor with 1500 rpm:
90 rpm
3% of n
< 10 kW
e.g. motor with 1500 rpm:
45 rpm
2% of n
< 30 kW
e.g. motor with 1500 rpm:
30 rpm
1% of n
< 100 kW
e.g. motor with 1500 rpm:
15 rpm
0.5% of n
> 500 kW
e.g. motor with 1500 rpm:
7.5 rpm
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Vector control
1PH7/ 1PL6 1PH7/ 1PL6
with without
incrementtal encoder
encoder
1024
.
pulses/rev
250 μs 250 μs
8 ms 14 ms
(7 + 1) (13 + 1)
80 Hz 35 Hz
See notes See notes
≤ 0.001 %
0.05 x f
slip
of n
rated
Notes
rated Asynchronous motors 1PH7/1PH8
are very similar to standard motors
where slip values are concerned.
rated
rated
rated
rated
Notes
1PH7/ 1PL6
with incremental
encoder
1024 pulses/rev.
250 μs
12 ms With encoderless operation in speed operating
(11 + 1) range 1:10, with encoder 50 rpm and above up to
rated speed.
A dead time of 1 ms is the default setting for
PROFIBUS DP.
60 Hz With encoderless operation in speed operating
range 1:10. The dynamic response is enhanced by
an encoder feedback.
Servo with encoder is slightly more favorable than
Vector with encoder, as the speed controller cycle
with Servo is quicker.
See notes Mainly determined by the total mass moment of
inertia, the torque ripple and, most importantly, the
mechanical design.
It is not therefore possible to specify a generally
valid value.
≤ 0.001 %
Without encoder: Determined primarily by the
of n accuracy of the calculation model for the torque-
rated
producing current and rated slip of the
asynchronous motor (see table "Typical slip
values").
With speed operating range 1: 50 (Vector) or 1:10
(Servo) and with active temperature evaluation.