Siemens SIMOTICS T-1FW68, Configuration Manual

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Description of the motor
2.1 Highlights and benefits
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
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2.1 Highlights and benefits
2.1.1 Overview
Segment motors are permanent magnet, modular synchronous motors. Segment motors
are supplied as components (stator segments and rotor segments) and installed directly
in the machine. A cooler integrated in the stator segment results in an essentially
thermally neutral behavior of the segment motor with respect to the machine itself.
The magnitude of torque that a segment motor can generate depends on the diameter,
the active length and the number of stator segments. Depending on the number of stator
segments and rotor segments, traversing motion in the form of an arc or a complete
circle can be created.
Figure 2-1 Stator segments
Figure 2-2 Rotor segment
The motors are designed for the SINAMICS S120 drive system.
You can use Motor Modules in the "booksize" or "chassis" format.
Accuracy
The accuracy of a direct drive with segment motor is governed by the:
• mechanical design, mechanical rigidity, and bearings of the machine
• Control technology used
• Resolution and measuring accuracy of the encoder