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How do I make this system run faster.

0 votes

the converter attached below runs smoothly until it slows down a lot at around 24 seconds. How can I make it faster?
asked May 31, 2019 by storm121 (19 points)
Sure. Basically I have a DC-DC converter that slows down a lot at around 24 seconds. At that point the system should go into CV mode since I am using CCCV charging. If you zoom in the system can be seen to be running but really slow. What should I tune to make it faster

1 Answer

0 votes

My 2 Cents:

  • Please clean up your PLECS schematic before you submit it to get help. It increases the chance to get a quick answer. 
  • I suspect the circuit is getting stuck in some kind of algebraic loop. (Not an expert on that.)
  • Why does the voltage controller have output saturation and the current controller doesn't? You always want to add output saturation.
  • The combination of the current reference from the voltage controller and the set current is usually done using a MIN(a,b) function in unidirectional converters, not sure what your goal is with the switch. For bidirectional converters it might however get more convoluted. 
  • Applying those two changes worked for me.
  • If you plan to operate the PI controller in constant saturation, you need to think about adding an integrator anti wind-up scheme. 

Hope this helped.



answered Jun 4, 2019 by Falk Kyburz (253 points)