Can synchronous motor generate ac voltage in absence of dc voltage to the rotor??

Discussion in 'Homework Help' started by Rizu, Oct 21, 2014.

  1. Rizu

    Thread Starter New Member

    Nov 1, 2012
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    In a lab experiment, the synchronous generator's rotor was devoid of all dc excitation but still we got 3 phase ac voltage on the stator. My question is why ?? Is it because of residual magnetism ??

    Thanks...
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,510
    2,369
    Yes, residual magnetism, this is is often the way many wound rotor field generators, DC & AC, are started without any external excitation, after starting the generator itself provides the excitation.
    Max.
     
    Last edited: Oct 21, 2014
    Rizu likes this.
  3. Rizu

    Thread Starter New Member

    Nov 1, 2012
    11
    0
    thanks Max....:)
     
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