CAB400M12XM3 MODULE LTSPICE SIMULATION

ahmedtpkl

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

Forum_Moderator

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TBhatia

Hello ahmedtpkl,

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

Bdeboi

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

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

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.

ahmedtpkl

It is working now. Thank you!