Siemens TV Converter Box 611 User Manual
Coupled motors
4
4.1
Parallel operation of several motors
Parallel operation of several motors on one axes
Provided that certain prerequisites are fulfilled, built-in torque motors can be operated in
parallel on a single axis and supplied by a joint power unit. Drawings: see the end of this
section
Note
Only torque motors that are the same size and have the same current requirements (same
Only torque motors that are the same size and have the same current requirements (same
winding design) can be connected in parallel. The order designations (MLFB) of the motors
must only differ with regard to the "component (position of the interfaces)" and "connection
type". The direction of the cable outlets and the length of the cables are irrelevant in the case
of an electrical parallel configuration. To illustrate this, a dummy MLFB is shown below in
which the wildcards indicated by boxes represent the positions that can vary between the
MLFBs; the wildcards indicated by "x" represent the positions that must be the same in the
MLFBs:
1FW6xxx-x□xxx-xx□x
If you have any questions about configuring/designing drive systems with torque motors in
1FW6xxx-x□xxx-xx□x
If you have any questions about configuring/designing drive systems with torque motors in
parallel operation, contact your local Siemens office.
When more than one motor is operated in parallel on a single power unit, the relevant
When more than one motor is operated in parallel on a single power unit, the relevant
national regulations must be observed. In particular, special precautions must be taken in
North America (special motor protection).
Requirements
The following must be taken into account when motors are operated in parallel on one axes:
● Only identical motors are suitable for parallel operation.
● The phase angles of the EMFs of the parallel motors must be the same, and the
● Only identical motors are suitable for parallel operation.
● The phase angles of the EMFs of the parallel motors must be the same, and the
commutation angle must be set precisely.
● The markings (notch and/or locating hole) on the stator/rotor in the motor must be
aligned. The motors can be positioned in relation to each other as required here.
The machine manufacturer must attach a mechanical angular position adjustment device in
the surrounding construction (e.g. via an adapter flange with oblong holes) for this purpose
either on a stator or rotor. An adjustment angle of +/-0.5% must be set (mechanically) to
ensure that the phase angles of the parallel motors can be set accordingly.
1FW6 Built-in torque motors
Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7
Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7
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