I'm trying to understand more into microstepping and the subfield of current limiting.
What I got till now is: powering the coil at a higher voltage than rated, increases speed (and ustep versatility) but takes in more current which will destroy the stepper - we can limit the current and we'll have (mostly) the same effects.
I want to simulate this in isis, but i know nothing of analogue electronics. I wasn't able to find a decent (ie working) chopper/current limiter schematic, except this one:
But this is very
theoretical, if someone can help me with some values for this thing (inductance, vcc, sense R value -, so i can actually see it working (ie chopping) on a scope, it would be great.
I'd also like to understand this. I presume the Sense voltage is something among (Coil resistance + 0.7) / sense * Vcc. But i'm not sure how the coil resistance goes around.