|
daox, sounds like a good project,
since you asked for electronic info i thought i might chime in.
From your schematic i am not exactly sure what your planing to do with the 5v power regulator and zener diode, sort of seems like your trying to power the starter with the 5v power regulator. Might be good to explain this a bit maybe i can offer a better solution which doesn't require the zener
anyway you would be correct in assuming the zeners wont current share exactly however they will current share a bit. It completely depends on the tolerance of the current / voltage relationship. zeners are not perfect so if you have a 6v zener it will actually start conducting very small currents down at say 5.5v and slowly increase current and say if you were putting through 10 amps through the zener it might drop maybe 6.5v instead of exactly 6. So in general terms if you parallel them if one zener takes more current its voltage will go up and in turn the other zener will be able to take more current due to the higher voltage. Sorry for the confusing explanation that is just how i think about components when evaluating current sharing.
Anyway all zeners wont have the exact same voltage / current curve so each of the voltages for a given current will be slightly different so the current will not share perfectly but it will not all be forced into one zener.
So if you didn't understand any of that, try it out just allow some extra head room in the power estimates because they wont share perfectly
|