Startup of third-party motors

Asynchronous motors

The nameplate data of the motor must be entered during startup:

  • Nominal motor speed
  • Rated motor frequency
  • Nominal motor voltage
  • Nominal motor current
  • Power factor (cos φ)
  • Nominal motor power

The parameters required for startup are calculated based on the nameplate data and the motor is taken into operation. A prerequisite is that the inverter is connected with the MOVISUITE® engineering software.

SEW-EURODRIVE also recommends carrying out a parameter measurement with FCB25 for better control characteristics. These determine the equivalent wiring diagram of the motor. The duration of the measurement depends on the motor parameters. In the case of asynchronous motors, the measurement is carried out in an idle state. If a brake is present, it remains closed.

Synchronous motors

The nameplate data of the motor must be entered during the startup of synchronous motors:

  • Nominal motor speed
  • Rated motor frequency or number of poles
  • Nominal motor voltage
  • Nominal motor torque
  • Maximum torque at the motor shaft
  • Maximum motor current
  • Optional:
    • Phase inductance
    • Internal voltage

In the case of synchronous motors without an encoder, a parameter measurement must then be carried out with FCB25. In the case of synchronous motors with an encoder, SEW-EURODRIVE recommends carrying out the parameter measurement. The brake is released (if present) during the measurement to align the rotor electrically. Make sure that the rotor can turn freely. For this reason, the motor must be separated from the gear unit or system. The duration of the measurement is limited to a few seconds.

In the case of synchronous motors with an encoder, the encoder offset must also be set after the above-mentioned startup procedure. This commutation takes place using the "Rotor position identification" function (FCB18). The rotor turns during the rotor position identification. Make sure that the rotor can turn freely. For this reason, the motor must be separated from the gear unit or system.