Buck Converter for Fuel Cell Model

I have found this Matlab example: https://www.mathworks.com/help/physmod/sps/examples/6-kw-45-vdc-fuel-cell-stack.html .It uses a boost converter to create a higher 100V Voltage. I need a lower dc bus voltage than the fuel cell output, so i have to use a buck converter. I tried creating one, unsuccessfully. Can somebody suggest a way to modify the boost converter block, which works perfectly, so that it becomes a buck converter?

Answer 1

[Sabin]

Probably this example is the best place to start:

https://mathworks.com/help/sps/ug/buck-converter.html

The parameterization of the converter (LC filter) will play an important role in the converter behaviour.