Description of the motor
2.1 Highlights and benefits
1FW68 radial segment motors
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Configuration Manual, 08/2021, A5E51132930B AA
Control quality
The control quality of a direct drive with segment motor is governed by the following
factors:
•
Stiffness of the drive system (dynamic quality of the machine design, bearing,
encoder mounting and the motor integration)
•
The precision when mounting and adjusting the encoder system
•
Quantification of the angular signal and speed signal (the number of encoder lines
and their multiplication in the encoder evaluation of the converter for each axis
rotation and the measuring accuracy of the encoder are crucial here).
•
Sampling time of the current, speed, and position controller.
In addition to selecting a suitable motor, encoder and controller, the precision and
control quality of the machine axis is essentially determined by the integration into the
overall mechanical system. As a consequence, a general recommendation for integrating
the motor cannot be given for all axis concepts.
To ensure that the motor and the encoder are optimally integrated into the mechanical
structure, Siemens offers its Application & Mechatronic Support Direct Motors service,
see Catalog. For additional information, please contact your Siemens contact person,
also refer to the Internet link in the Introduction under "Technical Support".
2.1.2
Benefits
Segment motors
•
have a redundant design so that if individual status segments fail the complete motor
does not fail
•
are powerful motors available in a wide range of types
•
set themselves apart as a result of a high continuous torque
•
have a modular design, and can therefore be configured to address customer specific
requirements
•
have a low force ripple, and are therefore suitable for high precision applications
•
have a simple coolant connection
•
are water cooled, and therefore have a high continuous torque
•
have low rotor losses and are therefore suitable for high peripheral velocities
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