Powerful Knowledge 16 - Analog control in power electronics

Analog control is the traditional way power electronic converters can be made to regulate their operation to provide the desired performance characteristics.
In many cases, this may be regulating the output voltage to a fixed level independent of input voltage and output load. In this episode, number 16 of our 'Powerful Knowledge' series, we outline the basics of analog control and provide an example of how it can be used to control a buck converter.
#stemeducation #powerelectronics #netzero #powerfulknowledge

[@bkiran5725]

Hi, the analog control explained here is different from many application notes with better understanding. Thank you !

[@idk2412]

Hi there, great videos I hope you keep them coming!? At 50:37 you show a bode plot with a 1A and 2A load. 1A bringing the converter into instability. Have you used PSIM before? Reason I ask is because generally I've been finding that if there is instability within the converter I can't seem to get nice bode plots like you are showing where you get to see that instability with such a nice clean trace.. Did you have to do any tricks or extra steps?

[@ElectronicmindsUK]

Hello, thanks for your question. We didn't use any special techniques here for the PLECs simulation other than the fact that during simulation we gradually changed one of the feedback capacitors to decrease the phase margin. We did this in a few steps as the simulation ran to show the transient response behaviour of the system as we move from a stable design towards one which is unstable. The simulation still runs in the unstable case but just shows an output behaviour which is oscillatory and doesn't recover from the transient load step. The same effect would happen in real systems whereby systems with small phase margins show many oscillatory cycles before settling after a transient and unstable systems continue to oscillate. I've not played with PSIM before but would be interested in how it compares to the simulations in this webinar!

[@tdrelectronics766]

Hi Iain another interesting webinar thanks for the headsup of the book Fundementals of power electronics of which I have added it to my amazon wishlist and i had a quick peak of the book on amazon at over a 1000 pages this should be a useful but weighty tome on my book shelf

[@ElectronicmindsUK]

Excellent, you will love the book!

[@biswajit681]

Excellent session...learned a lot ..Would it be possible to share the handwritten notes and mathcad files??

[@ElectronicmindsUK]

Glad you found it useful. Sorry but we don't release the notes or MathCAD files presently.

[@RaedMohsen]

Nice presentation. Are the documents summarizing the type of compensators available for download?

[@ElectronicmindsUK]

I have them available but not sure I can attached them here?

[@RaedMohsen]

@@ElectronicmindsUK yes, that would be helpful. Thanks