Can you let me know how to solve my errors? there are 4 errors in my simulink.

Hello all,

I am making PMSM modeling with simulink.

I faced in some error with this picture.

I attached my simulink data and error message.

I would appreciate if you could suggest solution for my issue.

[Ankit]

i dont have 2020 version.. could you put the screenshot of your model? or may be 2018b *.slx file.

have on look on the below links to know about alegbraic loop and how you can resolve them: Algebraic Loop Concepts - MATLAB & Simulink - MathWorks Deutschland

Why you should never break a continuous algebraic loop with a Memory block » Guy on Simulink - MATLAB & Simulink (mathworks.com)

Output input from previous time step - Simulink - MathWorks Deutschland

[승필 박]

Hello Ankit,

Do you know how to convert from Matlab 2020b to Matlab 2018b?

I don't know how to do it.

Then, I will transform my simulink data to 2018b version.

Thanks

[Ankit]

[승필 박]

Hello Ankit,

I tranformed my simulink data into 2018b version.

Please check and review it.

I would appreciate if you could give me solution.

Thanks

Answer 1

[Pat Gipper]

You had two issues. One was the integrators in Current_Controller were implimented using the Memory in the feedback path causing an algebraic loop. I simply moved the Memory into the forward path to remove this error message.

The second problem was an error message from the compiler about DQ_ABC/Matlab Function1. I had to correct this by specifically defining the size of the input "u" using the Ports and Data Manager. It was strange that the compiler only complained about this specific function.

[승필 박]

Hello Pat Gipper,

Thank you for giving me your solution. I resolved my issue based on your idea.

I really appreciated of your great support.

Thanks

[Pat Gipper]

Glad I could help.