How to simulate a DAB open loop in Simscape?

Question

Prashant Mishra 2022-7-21

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https://ww2.mathworks.cn/matlabcentral/answers/1764915-how-to-simulate-a-dab-open-loop-in-simscape

回答： Sabin 2022-12-15

I am trying to simulate a DAB converter in simscape so that I can run linear analysis on it. I'm learning to use this linear analysis tool for control system design. I have not really used simscape before and am finding a bit difficulty using the solver blocks. For this current model, I am trying to simulate the model shown in picture 1.

It only simulates if i have a ground(electrical reference block) connected on each side of the transformer. If not, I get an error as shwon in picture 2.

When I put ground on both sides, I get 0 as my output. So, can someone help me find the mistake I'm doing here? Any suggestion/comment will definetely of good help.

Thank you!

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Answer 1

Sabin 2022-12-15

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Hi,

An electrical reference is required each side of the transformer. The output 0 might be related to the way you define gate signals, or the parameterization of the components used in the model. I suggest looking at the following example in Simscape electrical:

https://www.mathworks.com/help/sps/ug/dual-active-bridge-control.html

I hope this helps.