Whiplash said:. Ii should have the bracket system for sale soon
Whiplash said:I can actually cruise at less than 300 watts if I moderately pedal doing 30+MPH if there is no headwind !
recumpence said:You have something wrong with your numbers there.
Rolling resistance alone will take 300 watts or more at 30mph. Typically, you will pull 1,000 watts or over in an efficient system on an upright bike to run that speed. The highest efficiency systems I have ever seen are in low recumbents and those require nearly 800 watts to cruise at 30mph.
Maybe your shunt it bad or something.
Matt
Of course, your controller needs to have a 6 pin CA connector for me to be able to perform this service.
Here is how I do it:
1) I plug the CA into your controller
2) I attach a power supply to your controller (typically 48V)
3) I set the iCharger constant current source (Foam Cut) to 20A
4) I attach the (+) iCharger output to your main ground
5) I attach the (-) iCharger output to one of your phase leads
6) I turn on the controller to power the CA
7) I activate the iCharger to drive the constant current
8) I note the value displayed on the CA
9) I turn off the current source
10) I calculate your new CA setting and program it
11) I then repeat the test to confirm settings are +/- 0.1A
This procedure works by driving a constant current through the main ground, through the shunt, through the body diode of the main fets, then out the phase lead. Credit for this procedure goes to Justin from ebikes.ca
-methods
Let's say pedal contribution was 200 Watts and that 800 Watts is required in total (4% gradient). 600 Watts from drive system @ 66.6 % Eta = 900 Watts. Not completely out of order.... Of course, we need data without pedal input.Whiplash said:I just climbed a 4-5% grade at around 25mph using only 900 watts so I am fairly certain im pretty close.