Timeline for How does applying an MPPT algorithm on a buck converter result in maximum current into the battery?
Current License: CC BY-SA 4.0
6 events
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| Feb 22, 2023 at 20:49 | comment | added | John D | @xrosaber Power input is voltage in times current in. Power out is voltage out times current out. Power out=Power in minus losses. So by maximizing power in, you also maximize power out. If voltage out (battery voltage) is relatively constant, the only variable left that can increase power out is battery current. | |
| Feb 22, 2023 at 20:40 | comment | added | xrosaber | @JohnD You are saying that maximizing input power from solar panel maximizes current into the battery since battery voltage is relatively constant over a short period of time. Can you elaborate on this? | |
| Feb 22, 2023 at 18:51 | comment | added | Criticizing Israel not allowed | @datenheim you have a fast control loop that tries to hold a certain input voltage, enclosed by a slow control loop that tries to optimize which voltage is best to hold in order to transfer the most power. Everyone says impedance, but I'm not sure why they say that, because a switching converter controller deals in currents and voltages, not impedances. | |
| Feb 22, 2023 at 18:31 | comment | added | John D | @user253751 That's also an interesting way to look at it, thanks. | |
| Feb 22, 2023 at 17:48 | comment | added | Criticizing Israel not allowed | rather than impedance, I found it informative to visualize an MPPT (dunno if it's useful for calculations) as holding a stable input voltage which is the MPP voltage, and trying to keep the input capacitor voltage at that voltage, by transferring energy to the output when it is too high, and not when it is too low. Of course, then the control algorithm has to adjust that voltage level until it finds the correct MPP voltage. | |
| Feb 22, 2023 at 17:14 | history | answered | John D | CC BY-SA 4.0 |