Unexpected noise in output voltage for buck converter
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Hello! I'm trying to simulate the buck converter using statespace equations. I don't understand why the output voltage has a ripple in the second photo (uncompensated system) and then, in the first one there is no ripple (compensated system)
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madhan ravi
le 4 Juil 2021
Modifié(e) : madhan ravi
le 4 Juil 2021
See the y axis scale of each picture.
Why not directly use simscape electrical https://www.mathworks.com/help/physmod/sps/ug/buck-converter-voltage-control.html?s_tid=answers_rc2-3_p6_MLT ?
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Pat Gipper
le 6 Juil 2021
The Puse Generator has a period of 1/100000 seconds, which is injecting 100 KHz pulses into your system. The ripple is simply the response to those pulse. Try setting Period=10 and Amplitude=24 and you will get rid of the ripple.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/676123/image.jpeg)
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