Quote:
Originally Posted by ChedMpls
finally got my cougar completed and I am bench testing. i'm having a problem with power control - as i try to throttle up i get no power and then reach a point where i get full power - nothing in between.
I removed my pot and it checks out ok - linear, 0-5k.
my test setup uses a 10v rcCar battery and a 6v salvaged drill motor.
rtd explorer shows nice throttle response graph but shows PWM going from zero to 510 all at once.
Any ideas? Can't wait to get this sucker tweaked so i can start building!
ched
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I think flores is right. There is a dead zone with the throttle, and as soon as you are out of the dead zone, the microcontroller tries to make current match the throttle position. So, 5% throttle means the microcontroller does the only thing it can to make the current be 5% of 500 (25 amps). Namely, it quickly ramps up the pwm in the futile attempt to receive 25 amps of feedback from the current sensor. It looks weird on the bench, but feels nice in the car.
Oh, I finished (mostly) all 4 control boards for the 1000amp controllers. I can't feel my hands though, because it's freezing in the garage. I should have soldered my hands a little to warm them up. I can't even type aahhhh.