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My LTSpice simulation is too slow

  1. Dec 29, 2015 #1

    How can i make my Ltepsice simulation faster ?

    it is taking me too much time (three days and it is not complete)

    the Defi diodes are supposed to hold up to 4 kv

    Attached Files:

  2. jcsd
  3. Dec 29, 2015 #2


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    what computer system are you running it on ?
    what are its spec's ?
  4. Dec 29, 2015 #3
  5. Jan 5, 2016 #4


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    can you provide the model for the diodes?
  6. Jan 5, 2016 #5


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    some things you can do to make it faster....

    change the integration method to trapezoidal.
    decrease the tolerance.
    put large (10 meg) resistors in parallel with the inductors.

    sim it for less time.
    record less of the simulation.

    You are running a simulation at a very small time-step (switching is occurring on a microsecond scale) for 30 seconds. is that necessary?
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