Quote:
Originally Posted by neutron256
For you programmers out there, how hard do,you think it would be to adjust the speed of the motor in a liner way to match a target boost pressure?
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Fairly easy using a brushless motor, you basically just need six mosfets and switch them on off in the right order. But its easier to buy an inverter package and tie your controller into it
I built one in Univ for fun for ~80$ I think. Used an arduino controller to convert a 0 to 5V signal from the pedal (or in this case you'd use the throttle body signal) and change it to a PWM to pulse the mosfets on and off which controls how much power you send, then during all that you alternate which mosfets you are driving to charge the right windings and push the motor forward. I think what I built was good for 48V / 30A. I used a inverter IC package since they frowned upon building something for that much power myself O.o
Obviously with something for a car it has to be more robust / withstand heat, but its not hard.
The coding was simple, like 15-20 minutes probably depending on how fancy you wanted it. Obviously with a GUI / other external stuff its different, but for just a basically throttle to output its a simple loop to build.