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    Can a VFD run a wound-rotor motor?

    Wound-rotor motor

    Product Line:
    Altivar drives

    All models and serial numbers

    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.

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