Siemens SIMOTICS T-1FW6 Series Configuration Manual page 116

Technical data and characteristics
6.1 Explanations of the formula abbreviations
Torque-speed diagram with field weakening
1 S1 duty
2 S1 duty with field weakening
3 S3 duty, cycle duration should not exceed 10% of the thermal time constant t
4 S3 duty with field weakening, cycle duration should not exceed 10% of the thermal time constant t
5 Voltage limit characteristic
6 Limit characteristic for S1 duty
7 Voltage limit characteristic with field weakening
8 Rated operating point at M
9 Operating point at M
10 Torque M at speed n = 1 rpm
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Figure 6-2 Schematic description of the torque-speed diagram
Note
Position of the rated operating point in the speed-torque diagram
The speed-torque diagram is a schematic representation. For naturally cooled motors, the
rated operating point is located on the limit characteristic for S1 duty.
The voltage induced in the motor winding increases as the speed increases. The difference
between the DC link voltage of the converter and the induced motor voltage can be used to
impress the current.
The torque must be reduced if the voltage limit of the infeed module is reached at speed n.
All operating points that can be achieved with the motor lie below the "voltage limiting
characteristic".
114
, n , I
N N N
, I , n
MAX MAX MAX,MMAX
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Naturally cooled 1FW6 built-in torque motors
Configuration Manual, 07/2017, 6SN1197-0AE01-0BP3
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