Siemens SINAMICS G130 Engineering Manual page 342

SINAMICS S120
Engineering Information
Chassis format, pulse frequency 2 kHz, closed-loop speed control
Servo Control
Synchronous 1FT7
motor without encoder
250 ms
Controller cycle
Total rise time –
(without delay)
Characteristic –
angular frequency -
3 dB
–
Speed ripple
–
Speed accuracy
Asynchronous 1PH7/1PH8
motor without encoder
Controller cycle 250 ms
21 ms
Total rise time
(without delay)
25 Hz
Characteristic
angular frequency -
3 dB
Speed ripple see Note
0,1 × f
Speed accuracy
slip
Typical slip values for standard and trans-standard asynchronous motors
Motor power Slip values
< 1 kW 6,0 % of n
< 10 kW 3,0 % of n
< 30 kW 2,0 % of n
< 100 kW 1,0 % of n
> 500 kW 0,5 % of n
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Ó Siemens AG
Vector Control
1FT7 1FT7 synchronous motors are not
with absolute designed for operation in vector control
encoder AM22DQ
mode.
250 ms
5 ms
100 Hz
see Note
£ 0,001 % of n
N
1PH7/1PH8 1PH7/1PH8
with incremental without encoder
encoder 1024 S/R
250 ms 250 ms
8 ms 20 ms
80 Hz 35 Hz
see Note see Note
£ 0,001 % of n 0,05 × f
N
e.g. motor with 1500 rpm:
rated
e.g. motor with 1500 rpm:
rated
e.g. motor with 1500 rpm:
rated
e.g. motor with 1500 rpm:
rated
e.g. motor with 1500 rpm:
rated
1PH7/1PH8
with incremental
encoder 1024 S/R
250 ms
12 ms
60 Hz
see Note
£ 0,001 % of n
slip
N
90 rpm
45 rpm
30 rpm
15 rpm
7,5 rpm
Notes
With encoderless operation in speed
operating range 1:10, with encoder from
50 rpm up to rated speed.
In this case, the dynamic response is
determined primarily by the encoder
system.
Determined primarily by the total mass
moment of inertia, the torque ripple and
especially the mechanical configuration.
It is therefore not possible to specify a
generally applicable value.
Determined primarily by the resolution of
the control deviation and encoder
evaluation in the converter. This is
implemented on a 32-bit basis for
SINAMICS.
With encoderless operation in speed
operating range 1:10, with encoder from
50 rpm up to rated speed.
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.
Determined primarily by the total mass
moment of inertia, the torque ripple and
especially the mechanical configuration.
It is therefore not possible to specify a
generally applicable value.
Without encoder:
Determined primarily by the accuracy of
the model calculation for the torque-
producing current and rated slip of the
asynchronous motor (induction motor) as
given in table "Typical slip values".
With speed operating range 1:50 (vector)
or 1:10 (servo) and with activated
temperature evaluation.
Notes
The 1PL6 / 1PH7 / 1PH8 compact
asynchronous motors are very
similar to standard asynchronous
motors with respect to their slip
values