Closed loop discrete PI controller

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Pranav Pillai
Pranav Pillai 2022년 8월 25일
댓글: Joel Van Sickel 2022년 9월 9일
how to find integral and proportional constants.how can i interface it with a PWM and switch input to get desired op.
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Sam Chak
Sam Chak 2022년 9월 3일
Could you provide the transfer function of the boost converter? It helps to determine the suitable values for the PI gains.

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Joel Van Sickel
Joel Van Sickel 2022년 9월 6일
Hello,
please use the references on this page to dive deeper into designing closed loop control for boost converters.
Regards,
Joel

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Pranav Pillai
Pranav Pillai 2022년 9월 9일
I have figured out the PI gains using ziegler-nicholas method.
How can i find my boost converters transfer function?
  댓글 수: 1
Joel Van Sickel
Joel Van Sickel 2022년 9월 9일
Hello Pranav, if you use average mode converter models, you can do it fairly simply using the controls toolboxed and the model linearizer app.
If you want to keep switching involved, you'll need to do a frequency reponse
Here is the basics for frequency response estimation.
One other alternative is since it's a boost converter, you can derive the 2nd order transfer function of the system, and close the loop with your PI controller using matlab commands or do it analytically. Wikipedia has the equivalent closed loop system for controller and plant defined as transfer functions available publicly, but getting the 2nd order transfer function for a boost converter is mostly in conference and journal papers.

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