I am working on design of a MPPT for charging batteries via solar panels. After doing some reasearch, I am a little confused as to how the boost converter can output a constant voltage, as well as limit the current flowing from the solar panel.
I get that you can use a PWM signal to basically output a constant voltage from a varying input voltage. However I am failing to understand how you can control the current coming from the solar panel when you do so, and how using a PWM signal on the boost converter can maximize the power point.
Can someone please explain in depth how a boost converter controlled via PWM allows you to not only output a constant voltage to the batteries, but also perform the function of an MPPT?
Am I missing something obvious that otherwise controls the current from the cells?
Here are some of the resources I have been reading if they are any help: http://ww1.microchip.com/downloads/en/AppNotes/01211A.pdf http://ww1.microchip.com/downloads/en/AppNotes/00001521A.pdf