Help understanding transformers in simulink

Question

Eduardo Gutierrez Robles 2022-7-27

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https://ww2.mathworks.cn/matlabcentral/answers/1768565-help-understanding-transformers-in-simulink

回答： SALAH alatai 2022-7-28

Hi, I'm currently working with an H-Bridge inverter but the results that I'm getting are weird.

To summarize my problem, when i connect a transformer to the H-bridge inverter my voltage behaves in a way that I'm not expecting.

Figure 1.- output voltage of the inverter without connecting a transformer

When I connect the transformer this is what i get

Figure 2.- output voltage of the inverter connecting a transformer

And the voltage that the transformer outputs is

Figure 3.- voltage from the transformer.

This is something that intrigues me because when i run the same simulation on PSIM the results are different. Can anyone help me?, I'm trying to learn how to use simulink instead of PSIM since i read somewhere that it was more useful. Thanks in advacne

Figure 4.- Design

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Joel Van Sickel 2022-7-27

Can your provide what the paramters for the transformer are? Also, can your provide a screenshot of what you expect from Psim? Your results don't necessarily look wrong for what you have in your model.

Regards,

Joel

Eduardo Gutierrez Robles 2022-7-27

Thanks to your answer I was able to realize my mistake. I was misinterpreting the results which means that this question was poorly made. Thanks for your answer, it helped me realize where i was confusing myself

Greetings,

EG

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Answer 1

Dr Narayanaswamy P R Iyer 2022-7-28

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The results appears alright. The spikes in waveform could be due to inductance of transformer windings compared to their resistance i.e. L/R ratio. P.R. NARAYANASWAMY. DR. N P R IYER.