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Rotor flux estimation for vector control

  1. Jan 11, 2012 #1
    Hi,

    I am having the following problem: I worked my way through variou books and papers to model an induction motor and a basic indirect vector control scheme (using clarke and park transform etc).
    Now, all is reasonably clear but 1 thing: how is the rotor flux value estimated.
    It is my understanding that this value is a constant and non zero (in a permanent magnet synchronous machine this value can be set to zero).

    I use a basic speed PI controller to calculate the iq_ref but how would I calculate id_ref for which I would need the rotor flux?

    I hope there is someone how can help me.

    cheers,
     
  2. jcsd
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