Siemens SIMOTICS S-1FK2 - Page 85

Winding versions
Several winding versions (armature circuits) for di󹪜erent rated speeds n
N
are possible within a
motor frame size.
Table 6-1 Code letter, winding version
Rated speed n
N
in rpm Winding version
(10th position of the Article number)
1500 B
2000 C
3000 F
4500 H
6000 K

4
,
,
')$#
')$#
NBY
.
.JO/N
OJOSNJO
① Voltage limit characteristics
Figure 6-2 Speed-torque diagram
The winding version of a motor de󹪝nes the position of the natural voltage limit characteristic ①,
and therefore de󹪝nes the operating range limit.
Motors with a higher code letter for the winding permit a wider speed range in the S1 and
overload ranges. However, these motors require a higher current for the same torque.
The preferred choice is the motor with the lowest code letter for the winding, which still
addresses the speed requirements for the application.
This is how you optimize the output current required, and therefore the converter size (rating).
Recommended Motor Module
For every motor, Chapter "Motor overview / Assignment Motor modules / Power cables
(Page 85)" recommends a Motor Module corresponding to its stall (starting) current.
Technical data and characteristics
6.1 Explanations
1FK2 Synchronous Motors for SINAMICS S120
Con󹪝guration Manual, 02/2022, A5E46927724B AD 83