Guru
Joined: 13/03/2017
Location: AustraliaPosts: 460
| Posted: 08:11pm 22 Mar 2019 |
Natalie, you want to use a micro and a DAC as a control reference in your feedback mechanism? Thats fine, does the ESP32 have a DAC ?
I'd be wary about using a boost topology if you are after high power and or have a large voltage difference between input and output. You could potentially put a lot of stress on you caps, diodes, and so on. In this case, imho, a transformer based design is called for. If your input voltage is close, then fine.
As Tony or Mike has said in Dave's thread, you need to watch the "negative impedance" of a boost circuit on a solar panel.
If I understand your application; that is you're creating, say, a 120Vdc buss , supplied by rectified mains and by diode isolated solar (via a boost converter). You want to feed maximum load demand by the solar, but mains can top up or take over where solar in insufficient. As in Tony's power source circuit.
How many panels, wattage? how many panels in a string, Voc and Vmp?
Cheers
Andrew