02-07-2012, 01:34 AM
Join Date: Mar 2006
Location: Schwarzenberg, Germany
Total Cats: 75
Alternator control in future firmware for MS3
As Ken originally wanted to add the feature already in alpha 18 I asked him about the feature:
Hi Ken, at the moment I am building my MS3X and before I have to build the somewhat complicated alternator control circuit for my Miata, I'd like to know how the software solution will be working - which outputs will be available for the function or better which outputs will be usable.
Could you eventually give me a short explanation.
Thanks a lot
Sven from Germany
The outputs available should be the same as any of the PWM features.
Right now I plan on it being an "on/off" implementation with a low voltage threshold and a hysteresis, and a high threshold also with hysteresis, so when voltage goes above a certain point it turns off the high output on the alternator and when it goes low it turns on tha output. When it is on it will feed forward its on status to idle control to allow response to any extra load it causes.
As I am not too much electronically inclined -
Would you think that this is sufficient for the 99- cars? Or won't this work on our cars (and I will have to build the circuit....)