Simulink PI controller error

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승필 박
승필 박 2022-3-10
回答： MULI 2024-2-15
Hello
I am buidling a modeling of boost PFC based on youtube lecture.
((1) MATLAB Simulation of a PFC Boost Converter - YouTube)
Even I designed same model as online lecture.
I have some error regarding PI controller as you can see the below picture.
Could you please check why I faced in this trouble ?
I attached my simulink data.
Please review my simulink error and give me feedback.
Thanks

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回答（1 个）

MULI
MULI 2024-2-15
I understand that simulation is stopped due to singularity in the solution.
This error is due to usage of RMS block that belongs to “DSP System Toolbox / Statistics” which gives the positive portion of the signal that has value zero at start of simulation which creates an issue since a division block is also used in the model.
Replace this with RMS block that belongs to “Simscape / Electrical / Specialized Power Systems / Sensors and Measurements” which computes the true root mean square (RMS) value of the input signal.
You may refer the link below for more information regarding this block:
https://www.mathworks.com/help/releases/R2019b/physmod/sps/powersys/ref/rms.html?searchHighlight=RMS&s_tid=doc_srchtitle
I am attaching the Simulink model by replacing the correct RMS block which runs successfully.

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