3 phase power source change the W variable

Question

Yusuf Demirkaya 2021-6-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/856190-3-phase-power-source-change-the-w-variable

回答： MULI 2024-4-26

I have a simulink project which one shows on figure (project name 'UsingMATLABFunction.slx'). We are using 3 phase power source. And i tried take loop. Because we want increase power for each iteration to take different output values.

open_system('UsingMATLABFunction.slx');
W=30000;
set_param('UsingMATLABFunction/Source', 'Pref','W');
for ii= 1:10        %% 10 iterations. 10 times power increased.
    W=W+10000
    x=x+1;
    y=y+1;
    z=z+1;
    set_param('UsingMATLABFunction/Source', 'Pref','W');
    sim('UsingMATLABFunction.slx');
    save_system('UsingMATLABFunction.slx');
    
end

I did it like this code but i cant change the current values with source. am i making a mistake somewhere?

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Answer 1

MULI 2024-4-26

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/856190-3-phase-power-source-change-the-w-variable#answer_1448491

在 MATLAB Online 中打开

Hi Yusuf,

From the code you have provided it appears that the parameter ‘Pref’ is set to a string ‘W’ instead of setting it with numeric value. Due to this the parameter ‘Pref’ is not updated with the numeric values as you increase ‘W’ in each iteration of the loop.

To correctly update the parameter, convert the numeric value to a string using “num2str” as given below:

set_param('UsingMATLABFunction/Source', 'Pref',num2str(W));

With this correction loop will appropriately increase the value of ‘W’ by 10000 in each iteration.

You may refer to this documentation link for more information on that:

https://www.mathworks.com/help/releases/R2020a/simulink/slref/set_param.html

Hope this answers your query!