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Designing a Charger ? help

Discussion in 'Homework Help' started by Freeza, Sep 7, 2012.

  1. MrAl

    MrAl Well-Known Member Most Helpful Member

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    Hi,


    Oh great, glad you got it going. Now you can really start some interesting experimenting.

    The start ext DC supplies at 0v is to aid convergence in some circuits. The power turning on is like a step input which is a very fast rising wave front which sometimes doesnt give the rest of the circuit enough time to locally stabilize (high value derivatives). But ramping up the supply voltages allows a smoother transition between states so the derivatives are lower and this often helps a very stiff circuit converge.

    There's also the question of what numerical method to use (checkbox). I recommend Gear unless the simulation is taking too long for you to wait. Gear's can be phenomenally accurate compared to the other methods because the solution is iterated for each point.
     
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  2. meowth08

    meowth08 Member

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    I could not find "Gear" in the choices for my simulation command. I also asked Mr Google but he seems not to know.
     
  3. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    Hi squire,
    Look under Tools

    E.
     
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