How to linearize a switching model of buck-boost converter?
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I have a buck-boost converter (switching model) and I want to linearize my converter around some steady state operating condition. I know how to get analytically derive the transfer function of the model but I want to verify my transfer function (or characteristics) with what I get from linearization function. I know PLECS has perturbation and response small signal blocks and then you can do impulse response to get bode plots. How to get the linearized model of my converter and thus obtain any kind of plots like bode? I am attaching the switching and average model of my buck-boost converter. Any help and clues are much appreciated.
Thanks Puneet
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Respuestas (2)
Rakesh Chavan
el 14 de Mzo. de 2016
Hi,
You can use the Linear Analysis tool for linearizing your model. Some examples and documentation for the same can be found at the following link: http://www.mathworks.com/discovery/linearization.html
You can set the operating points as needed as well as observe the responses in terms of Bode plots. You may also want to look at the following link for Frequency Response Estimation Using Simulation-Based Techniques: http://www.mathworks.com/help/slcontrol/examples/frequency-response-estimation-using-simulation-based-techniques.html
Hope this helps.
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Regards
Rakesh
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Rushi Jariwala
el 25 de Dic. de 2017
Hi Puneet. Can you share how you did frequency response estimation for the averaged model? Is it the same as described in the 2nd link?
Sathish Lakshmanan
el 29 de En. de 2019
HI I am also searching for Linearization of Switching models. I have AC supply , Input Filter, Vienna rectifier(PFC correction) and DC-Dc Resonant converter in my model. To derive the transfer function fot this whole model looks complicated. If somebody can help me how to derive the transfer function directly from the Simscape Model. I will derive the transfer function for each model and finally combine the model.
Thanks in Advance
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Arkadeep Deb
el 10 de Jun. de 2021
Hello, did you manage to solve the problem? I am having the same problem as mentioned above. Can you please help me?
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