Coupled motors | 4 |
4.1Parallel operation of several motors
Parallel operation of several motors on one axes
Provided that certain prerequisites are fulfilled,
Note
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:
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 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 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
1FW6 | 55 |
Configuration Manual, 05/2009, |
