I have a beginner question about boost converters. I would like to model a solar cell using the following equivalent circuit: This effectively gives me a current source (constant in the simplest cases but ultimately I want to add variability due to temperature and insolation as well). Now, when I connect a boost converter to the above circuit, I can increase the voltage but not by as much as I would like. Changing the duty cycle makes the input voltage of the converter lower and thus the output doesn't increase... Here's a schematic of the converter:
It also doesn't really make sense (based my limited knowledge of electronics) to join a current source to the boost converter without any modifications as, when the switch is connected vertically (on state), the steady state current over the inductor doesn't change so its voltage is zero. Therefore, the longer the on state (or the greater the duty cycle D), the closer to zero the voltage to be boosted gets before the switch opens again.
How could I easily change my model to overcome this? Can I just smack a capacitor of the right size in parallel between the solar cell and the boost converter? I'm ultimately looking into creating a controller that keeps a steady output voltage with varying load so just choosing a greater resistor as load doesn't really solve the problem.
Any help is greatly appreciated.