-1
\$\begingroup\$

I am designing system that includes a solar power stage with an MPP tracker. The DC/DC converter in the MPPT is feedforward, i.e. it regulates the input voltage of the solar panel to the maximum power point. However, the output is then left unregulated. Note: it will not be connected to a battery directly like it is often done, it will be a separate "MPPT bus" from which various loads will draw.

In such a configuration, what would determine the output voltage of the converter? Is it the load, or do component values play a role as well? Or is the duty cycle still defining the input/output voltage relationship?

I am using a buck/boost converter, but you can assume any non-isolated topology, I am looking to understand the principle.

\$\endgroup\$
2
  • \$\begingroup\$ what would determine the output voltage of the converter? - totally, the schematic and the parts list and any loads connected to it plus details of the solar panels. Basically everything you haven't disclosed. \$\endgroup\$
    – Andy aka
    May 3, 2021 at 15:29
  • \$\begingroup\$ It's everything - what happens if there is no load and you try to regulate in such a way that the MPP is met? Where will the power go - will the voltage be regulated up to infinity to finally get an arc to get some current going? What happens if you have a higher load than you can supply? \$\endgroup\$
    – Arsenal
    May 3, 2021 at 15:32

1 Answer 1

0
\$\begingroup\$

You really want to hook that converter to a battery. MPP converts generally assume they are charging a big battery that can take more current than the converter will ever put out. Any good design will have a maximum output voltage limit above which they stop trying to be MPP.

\$\endgroup\$
1
  • \$\begingroup\$ Thanks for the advice. Yes, I have a battery in my system that I will use in this fashion. I was just curious what else, besides loads, will influence the output voltage. \$\endgroup\$
    – Mu3
    May 4, 2021 at 7:25

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.