Electrical Data
1.1 Definitions
General Section for Synchronous Motors
1-4 Configuration Manual, (PJAL), 11.2005 Edition, 6SN1 197-0AD07-0BP4
Voltage limiting characteristics
The motor EMF increases proportionally with the speed. Only the difference between the DC
link voltage and the increasing motor counter-voltage can be used to impress the current
This limits the magnitude of the current which can be impressed at high speeds.
Warning
Continuous duty to the right of the voltage limiting characteristic and in the range above the
S1 characteristic is thermally inadmissible for the motor (refer to Fig. "Torque characteristics
of synchronous motors").
The voltage limiting characteristic of a motor with 6000 RPM rated speed lies far above that
of the same motor type with 2000 RPM. However, for the same torque, this motor requires a
significantly higher current. This means that it is practical to select the rated speed that this
does not lie too far above the maximum speed required for the application. The size (rating)
of the drive converter module (current requirement) can be minimized in this fashion
Table 1-1 Code letter, winding version
Rated speed n
N
[RPM]
Winding version
(10th position of the Order No.)
1200 A
1500 B
2000 C
2500 D
3000 F
4000 G
4500 H
6000 K
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