6.6
Main Display
Finally, the last setup option allows the user to select whether the
primary display screen shows watts or amps in the bottom left corner,
nd
depending on the user preference. The 2 display screen will always
show both quantities.
7.
Using the Limiting Features
There are many situations when it is desirable to limit the amount of
power that the controller is able to draw from the battery pack. For
instance, you might want a current limit in order to:
A) Protect the cells in a battery pack from delivering more than their
rated amperage
B) Extend the range of your vehicle by reducing current draw during
acceleration and hill climbing
C) Safely cycle at low current a NiMH or NiCad pack that has been
sitting unused for a long period
D) Keep the motor's power within a legally stipulated power limit
A speed limit can help make any electric bicycle abide by the legal
speed caps that exist in most jurisdictions while not affecting
performance below that speed. It can also be useful for extending the
range or for taming a setup that is otherwise too fast for comfort,
without sacrificing hill climbing torque.
The voltage limit is used primarily to prevent the battery pack from
being over discharged which can be damaging to the cells. Typically,
you would set it between 29 to 31V for a 36V pack, and between 39 to
41V for a 48V pack.
7.1
How the feedback works
To understand how the limiting features work, just imagine how you
would operate the throttle manually. If you are going over a desired
speed limit, you would back off the throttle. If the vehicle then reached
a hill and started to slow down from your target speed, you would
further engage the throttle, thus continuously adjusting the throttle
position to keep at your desired velocity.
38.4 V 25.6 kph
3.13 A 6.214 Ah
Select
Watts
or
Amps
12
