23 January 2021
Wound-rotor motorProduct Line:
All models and serial numbersCause:
Altivar variable frequency drives may be used to operate wound-rotor motors. Most wound-rotor motors are used where high starting torque is required so an Altivar 312, Altivar 32 or Altivar 71 drive would be most suitable for this application.
The wound-rotor motors use resistor to connect the rotor windings. The resistance can be adjusted to control the speed/torque characteristis of the motor.
To use a variable frequency drive with a wound-rotor motor the resistors would need to be shorted.
It is also recommended to use a dv/dt filter on the output of the drive to smooth the PWM.