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Phase shift bridge simulation in Speedfit

Zan_H
Zan_H Wolfspeed Employee - Contributor Level 2
in General

I'm having trouble running a simulation for phase shift full bridge in Speedfit.

Using ideal diode and heatsink, simulation won't converge using below conditions:

image.png

Error message suggests inductances are too large however Speedfit doesn't allow user to change Cr and Lr manually.

Changing frequency from 80kHz with according Cr&Lr allows the simulation to run, however output power is limited to 10.95kW

image.png
image.png


Can someone look into this and let me know why Cr/Lr can't be changed manually, and why output power is capped?

Thanks!

Zan

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Comments

  • ZMiller
    ZMiller Wolfspeed Employee - Contributor Level 3

    Hi Zan,

    I was able to recreate this issue. I will investigate this problem and get back to you when I have a solution.

    Thanks,

    Zack

  • ZMiller
    ZMiller Wolfspeed Employee - Contributor Level 3

    Hi Zan,

    The Lr/Cr are set internally by the simulation and at this time cannot be changed. Speedfit will be updated at the end of this week and this should resolve the issue you're seeing with these simulation conditions.

    Thanks,

    Zack

  • TBhatia
    TBhatia Wolfspeed Admin - Contributor Level 5

    Hi, I hope that this answered your question. If it did, please click on "This question has been answered - Close Discussion" . If you have a follow up question, at a later date, please "Start a New Discussion"  

  • Zan_H
    Zan_H Wolfspeed Employee - Contributor Level 2

    Thanks for updating Speedfit, I'll close the discussion.

This discussion has been closed.