View Single Post
Old 01-26-2019, 05:18 PM   #3353 (permalink)
thingstodo
Master EcoModder
 
Join Date: Sep 2010
Location: Saskatoon, canada
Posts: 1,483

ChargE (not yet running) - '92 Mazda MX6 LX
90 day: 33.89 mpg (US)

Ford Prefect - '18 Ford F150 XLT XTR
Thanks: 747
Thanked 562 Times in 445 Posts
Exclamation

Quote:
Originally Posted by esali1987 View Post
Ah ok. Ill look into that. I am only using a small pot for now. This pot is outputting 0 and 1023 just fine. would that need any calibration?
As long as you have the pot in the range of 'no movement' when you power up the controller you should be fine.

The settings (on my controller) are:
Code:
fault-throttle-position=0005
If the throttle input goes lower than 5, ignore the throttle. It's a fault - short circuit.

Code:
max-regen-position=0025
At this value, you are commanding maximum regenerative braking

Code:
min-regen-position=0400
At this value, you are just engaging regenerative braking. It scales linearly from min to max position

Code:
min-throttle-position=0624
At this value, you are just engaging the throttle forward. It scales linearly from min to max position

Code:
max-throttle-position=0972
At this value, you are putting out maximum throttle.

So between 400 and 624, using these settings, is where the throttle should be when you power it up. Raise it to go forward, lower it to 'brake'

I don't remember a fault that is thrown if you are over max throttle. Not sure what happens.

Remember that the throttle is commanding TORQUE, not SPEED. So max throttle is trying to push your max CURRENT through the motor to develop that TORQUE. Keeping the throttle in the same position with a motor on your bench will accelerate the motor up to your maximum speed - at least that's what it did to me.

But only if you have enough voltage on your pack to hit your overspeed setpoint.

NOTE - you don't need to have your throttle near MAX in order to put an unloaded motor up to your max speed. As long as the commanded current will get you to max speed, it will go there. If your throttle is low, it will take a while to accelerate to max speed and trip.
__________________
In THEORY there is no difference between Theory and Practice
In PRACTICE there IS!

Last edited by thingstodo; 01-26-2019 at 05:20 PM.. Reason: Forgot to add note about throttle not being at max
  Reply With Quote
The Following User Says Thank You to thingstodo For This Useful Post:
esali1987 (01-26-2019)