MUTX

Frans
2007-06-22
2012-12-15
  • Frans
    Frans
    2007-06-22

    In the news I read that it's now possible to use n mutual inductors with the spice converter. Which netlist do I need? I tried something like:
    .SUBCKT ind4 1 2 3 4
    MUTX:K12K13K14K23K24K34 1 _ref 2 _ref 3 _ref 4 _ref L1=1.3uH L2=1.3uH L3=1.3uH L4=1.3uH k12=0.1 k13=0.019 k14=0.013 k23=0.1 k24=0.019 k34=0.1
    .ENDS
    .END
    but I am not very familiar with spice netlists.

     
    • Stefan Jahn
      Stefan Jahn
      2007-06-22

      Hello!

      The qucsconv program is able to translate something like this:

      ==============================
      * mutual inductances
      L1 1 2 1n
      L2 3 4 1n
      L3 5 6 1n
      L4 7 8 1n
      K12 L1 L2 0.1
      K13 L1 L3 0.2
      K14 L1 L4 0.3
      K23 L2 L3 0.4
      K24 L2 L4 0.5
      K34 L3 L4 0.6
      ==============================

      But also for an arbitrary number of inductors and coupling coefficients.

      Cheers, Stefan.

       
    • Frans
      Frans
      2007-06-28

      Does this solution use the MUTX compponent?

       
    • Stefan Jahn
      Stefan Jahn
      2007-06-28

      Hello!

      If you pipe it through the qucsconv (SPICE to Qucs converter), then: yes.

      $ qucsconv -if spice -of qucs < infile > outfile

      You will see in the result the MUTX component of Qucs.

      Stefan.

       
    • Frans
      Frans
      2007-06-29

      I see, it does indeed use the mutx component, but if I compare the MUT2 and the MUTX (both with 3 inductors) it doesn't actually give the same results.
      Unfortunately I can't place any screenshots on this forum so I will put it in the bug-reports.

      Cheers,

      Frans

       
    • Stefan Jahn
      Stefan Jahn
      2007-06-29

      I've just responded to your bug-report request.  You made one apparent mistake while comparing them...

       
    • Frans
      Frans
      2007-06-29

      Ok, it's my fault!
      Thank you very much for your quick response!

      Cheers,

      Frans

       
    • Stefan Jahn
      Stefan Jahn
      2007-06-29

      So now the results are identical?  Can I close the bug again?

       
      • Frans
        Frans
        2007-06-29

        Yes, it's perfect now, I start liking the program more every day!