PFC modeling in DC-DC converter

[Patrick66]

Hello everyone, may I ask what is the reason for obtaining the transfer function Gd(s) based on the video link: https://www.youtube.com/watch?v=wEZG5Ykbt_o&t=20s. Is it used to reduce the ripple of the rectified AC signal and why the equation of the Gd(s) is constructed in this format as shown in the Figure below. Thank you very much for the help and sorry for my ignorance.

[jonpaul]

Reason is to learn .

read comments on that video.

Send message to the video author.

No one here can do more

j

[Patrick66]

Ok I will do that thank you for the advice.

[moffy]

Just for a little context the video relates to modelling a flyback driven constant current LED driver and Io(s) is the output current and d(s) is the PWM signal. So Gd(s) is the transfer of the desired output over the controlled input. First appearances, the man, Marcos Alonso, seems brilliant, a true engineer reducing by reasonable assumptions complex problems to manageable solutions. But to confirm or understand his analysis would take many hours of derivation as quite reasonably for the video he only provides the results with basic steps. But thanks for the question, I learned a little, un piquito.