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CAB400M12XM3 MODULE LTSPICE SIMULATION

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ahmedtpkl
ahmedtpkl Contributor Level 1
edited October 2023 in Module Products

I am simulating a DAB converter using CAB400M12XM3 modules. But the circuit doesnt work after I connect the Mid points of devices. It looks like a NETlist problem. How can I sort it?

Thank you

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  • Forum_Moderator
    Forum_Moderator Wolfspeed Employee - Contributor Level 5
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    Thank you for your post, it has been approved and we will respond as soon as possible.

  • TBhatia
    TBhatia Wolfspeed Admin - Contributor Level 5
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    Hello ahmedtpkl,

    Can you please share a screen capture of the error you're getting? Thank you!

  • Bdeboi
    Bdeboi Wolfspeed Employee - Contributor Level 3
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    Hi Ahmed,

    In addition, if you could provide your LTspice simulation, I can take a look at your circuit and see what is going on.

    Thanks,

    Brian

  • ahmedtpkl
    ahmedtpkl Contributor Level 1
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    DAB_V1_FULLSCALE.asc

    Please find attached simulation file. When the midpoint of the device was connected to the transformer, all gate signals are zero. When I tried the same simulation with the discreate devices, It work fine.

  • Bdeboi
    Bdeboi Wolfspeed Employee - Contributor Level 3
    edited October 2023
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    Hi Ahmed,

    I should have noticed this from your screenshot, but your inductor 'L4' has an inductance value of 0 H. This is what is causing your simulation to fail.

    I recommend using the embedded parasitic parameters in your inductors and capacitors rather than explicitly defining the parasitics in the circuit. This method is more efficient. For example, right-click L3 and add '30m' to the series resistance field, then delete R4.

    Another thing - all inductors in LTspice default to a 1 mΩ series resistance. If this is not desired, make sure you specify the series resistance as 0.

    Finally - you have the temperature ports (TjQ1/TjQ2) all shorted together, and your 'Tc2' ports are not attached to the heat sink. This will all cause the thermal calculations to be incorrect.

    image.png


  • ahmedtpkl
    ahmedtpkl Contributor Level 1
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    It is working now. Thank you!

This discussion has been closed.