Siemens SINAMICS S150 - Page 341

SINAMICS S120
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
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Chassis format, pulse frequency 2 kHz, closed-loop torque control
Servo Control Vector Control Notes
Synchronous
motor
1FT7
without encoder
1FT7
with absolute
encoder AM22DQ
1FT7 synchronous motors are not
designed for operation in vector control
mode.
Controller cycle
250 ms 250 ms
Total rise time
(without delay)
– 1,2 ms
Characteristic
angular frequency -
3 dB
– 400 Hz
In this case, the dynamic response is
determined primarily by the encoder
system.
Torque ripple
–
1,3 % of M
0
A ripple of < 1 % is possible with an
absolute encoder ≤ 1 rpm.
Not possible with resolver.
Torque accuracy
–
±1,5 % of M
0
Measured value averaged over 3 s.
With motor identification and friction
compensation.
In torque operating range up to ± M
0
.
Speed operating range 1:10 up to rated
speed.
Notice: External influences such as
motor temperature can cause an
additional long-time inaccuracy
(constancy) of about ± 2.5 %.
Approx. ± 1 % less accuracy in field-
weakening range.
Asynchronous
motor
1PH7/1PH8
without encoder
1PH7/1PH8
with incremental
encoder 1024 S/R
1PH7/1PH8
wihout encoder
1PH7/1PH8
with incremental
encoder 1024 S/R
Controller cycle
250 ms 250 ms 250 ms 250 ms
Total rise time
(without delay)
– 1,6 ms 2,5 ms 1,6 ms
With encoderless operation in speed
operating range 1:10, with encoder 50
rpm and above up to rated speed.
Characteristic
angular frequency -
3 dB
– 350 Hz 200 Hz 300 Hz
With encoderless operation in speed
operating range 1:10.
The dynamic response is enhanced by
an encoder feedback.
Torque ripple
–
2 % of M
N
2,5 % of M
N
2 % of M
N
With encoderless operation in speed
operating range 1:20, with encoder from
20 rpm up to rated speed.
Torque accuracy
–
±3,5 % of M
N
±2 % of M
N
±1,5 % of M
N
Measured value averaged over 3 s.
With motor identification and friction
compensation; compensation of
temperature effects by means of
KTY84 / PT1000 and mass model.
In torque operating range up to ±M
N
.
Approx. additional inaccuracy of ± 2.5 %
in field-weakening range.
Servo: Speed operating range 1:10
referred to rated speed.
Vector: Speed operating range 1:50
referred to rated speed.