Simscape: Linear transformer open circuit error

Question

Ryan 2017-5-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341601-simscape-linear-transformer-open-circuit-error

回答： Joel Van Sickel 2020-9-2

Hello,

I'm trying to model a full-bridge DC-DC converter in simscape. I have the model built using ideal switches for the mosfets with a simple switching scheme. However, when I run the model, even though the simulation time is 0.05s it comes up with an error that at t=8s, the linear transformer is "open-circuited" because a couple switches are off simultaneously. This off-time should happen and is normal for the switching scheme.

I've attached a couple pictures of my diagram and error.

Would this error be because of no anti-parallel diodes with the switches?

Thanks!

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Suhan 2017-5-26

You can refer to the following article:

https://in.mathworks.com/matlabcentral/answers/171909-why-do-i-get-an-error-about-inductors-connected-together-when-simulating-a-model-in-ideal-switching

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Answer 1

Joel Van Sickel 2020-9-2

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https://ww2.mathworks.cn/matlabcentral/answers/341601-simscape-linear-transformer-open-circuit-error#answer_488752

Hello Ryan,

yes, you can create circuits that our tool cannot simulate with this topology. If you include things like diodes and snubbers, this can solve the problem.

Regards,

Joel