SPICE Transformer model equivalent circuit parameters

Discussion in 'General Electronics Chat' started by CMB042, Jul 23, 2015.

  1. CMB042

    Thread Starter New Member

    Jul 23, 2015
    2
    0
    Hello,

    Using the transformer subcircuit it list 4 parameters:

    *RATIO = Turns ratio= Secondary/Primary
    *RP = Primary DC resistance
    *RS = Secondary DC resistance
    *LEAK = Leakage inductance
    *MAG = Magnetizing inductance

    Ratio and resistance I understand how to get to, but what is it asking for inductance wise? I understand what leakage inductance is, but does it want the primary or secondary leakage inductance? Does it want total leakage as in a sum? Or does it use the ratio to calculate it the secondary? I think the magnetizing inductance is the same measured from the primary or the secondary, is that true?

    If I measure the inductance of the primary with the secondary shorted, I get the magnetizing inductance plus the primary leakage. Then if I measure with secondary open, I get just the leakage. Assuming I am using a frequency in its operational range. Am I correct?

    Thanks
     
  2. garyy

    New Member

    Jun 4, 2014
    7
    0
    have you check the model file from linear lt spice? that should have a transformer model in it.
     
  3. eetech00

    Active Member

    Jun 8, 2013
    649
    112
    Which version of Spice?

    What transformer are you modeling? P/N?
     
  4. CMB042

    Thread Starter New Member

    Jul 23, 2015
    2
    0
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