Need help with the boost converter simulink model (average model).
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Hello ! I am trying to implement an MPPT and for that I need a boost converter. Since the average model works better I am using the average model boost converter with a P&O code, however when I use the P&O code, it decrements the duty cycle untill it is 0. However the same code works fine with the conventional self made converter (but response is slow).
Please provide feedback.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/165819/image.jpeg)
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Sebastian Castro
le 6 Juil 2017
It could potentially be that switching from PWM to Average mode is messing with the sample rate of your P&O MATLAB Function block, as it could be inheriting sample times (the default setting).
Go to "Display > Sample Time > All" and see whether the sample rate of that block changes depending on which converter to use.
The best option is to explicitly set your P&O algorithm sample time by going to the block properties and choosing a Discrete sample time of your choice: https://www.mathworks.com/help/simulink/ug/matlab-function-block-editor.html#bqoe0f9
- Sebastian
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