View Single Post
Old 07-23-2009, 03:14 PM   #2076 (permalink)
jyanof
Joe
 
Join Date: Feb 2009
Location: phx
Posts: 260
Thanks: 0
Thanked 48 Times in 38 Posts
Quote:
Originally Posted by MPaulHolmes View Post
power = current*pwmDuty.

But the problem is, 500 amps * 0.01v = 5 watts, and 0.01 amp * 500v = 5watt.

When the rpm is 0, the motor is almost a short circuit. So, to allow very very small pwm (very low power) still allows for big current. I don't see how throttle = power allows for control of current at near 0 rpm.
Hm, it was a neat idea though. could it be that the throttle => power is just too sensitive? I mean, at low duty cycle and low motor amps, there is a small amount of power - but if the input from the pedal can't go that low, or even a small press of the pedal demands a much higher power, it's not gonna work. maybe the throttle input just needs to be scaled down? I guess you'd run the risk of not having higher power...

anyway, was a fun thing to try.
__________________
ReVolt AZ testing thread:

http://ecomodder.com/forum/showthrea...ting-9325.html
  Reply With Quote