Cycle Analyst V3.1 User Manual
Rev 1.0
6.12 Setup Ebrakes and Regen.
The 4-pin ebrake plug of the Cycle Analyst supports digital ebrake cutoff sensors.
Most sensors are 2-wire normally open switches that close when the brake levers
are pressed, though some are powered hall sensor devices and require 5V too.
The CA supports both types and also allows for ebrakes with reversed normally
closed switch logic, which is often easier to implement with DIY cutoffs.
When the brake levers are squeezed, the throttle slider on the main screen will
instead show an animated brake lever, and the throttle output voltage to the
controller will drop down to the programmed Brake Out voltage, effectively cutting
power to the motor.
With Grin and certain third party controllers, the throttle signal range from 0.0V to
0.8V is mapped to do proportional regenerative braking. This mapping allows the
CA3 to regulate motor braking behavior on the same throttle output signal. When
the propotional regen feature is enabled, the Brake Out voltage sets the baseline
braking force when levers are squeezed, and the throttle can further modulate
this to maximum braking (equivalent to an output of 0.0V)
There is also a Min Brake Time parameter which supports using the brake lever
as a shift sensor cutout for mid-drive systems. It's possible to hook up a shift
sensor product directly to the ebrake plug, or briefly tap the brake lever before
shifting. The CA will keep the motor cutout active for the minimum time setting in
order for the gear shift to complete before power is reapplied.
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