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Using a VSD to run US wound motors


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#1 Les L

Les L

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Posted 14 February 2003 - 09:57 PM

Hi,

Are there any pit falls when using A VSD to run US 460 V 60 HZ motors.Will the preformanc be the same as the US

Thanks

#2 Lash

Lash

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Posted 06 March 2003 - 06:15 PM

You must be careful when trying to apply a VFD or Softstart to a wound rotor motor. You can do it, if you short the armature rings but since the motor was designed for voltage and current to be applied to the armature through slip rings and not induction the available starting torque is greatly reduced. You can continue to use the existing resistors at start up to add needed torque but at running speed the slips rings need to be shorted.




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