State discontinuity after switching Error

Question

Hii,

  When I try simulate the thermal model of an IGBT with RL load , I am getting the State discontinuity after switching error. With R load it is working fine. Please suggest me a solution. I have attached model & thermal parameter file.

Answer 1

Please see the following guidance on the Plexim website: https://www.plexim.com/support/solutions/165

Comments

Dear Mr.Bryan,

Already I gone through that solution, I didn't get that, please open my plecs model and tell me what is wrong exactly in my model.

Thanks in advance.

With warm regards,

Manikandan R.

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Hello, per the link Bryan sent, "The issue is caused when you attempt to interrupt an inductive current or capacitive voltage instantaneously, which is not possible with ideal components." In your model, you are forcing the current in the inductor to zero instantaneously with the opening of the switch since there is no other path for it to travel along. If you remove the inductor from your circuit or provide a parallel impedance path the circuit will work.

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Thanks Kris for your suggestion