Speed Limit Setup Menu
Speed Limit Settings, preview line shows max speed, but there are also a minimum start speed limit and max throttle only speed setpointsThere are both minimum and maximum speed limit settings available, and the 2nd line preview shows the speed limit set point present in the current preset. If you don't want to use the Cycle Analyst to limit the vehicle speed in any capacity, then this can be left at the default setting of 199 kph.
Click for Explanation of Speed Limit Settings
The CA can be configured with a speed limit to cut motor power when the bike exceeds that limit. This speed limit is implemented as a PID controller and so there are three gain terms that may need to be tweaked to achieve the desired responsiveness when the bike hits the limit point. Surging or oscillation at the speed limit setpoint or power cutouts on hard acceleration (powerful bikes) are indications that speed gain adjustments are needed.
[ SLim->Max Speed ]*
Upper speed limit. The CA rolls back throttle output voltage whenever speed exceeds this setting.
OEM->AbsMaxSpeed determines the maximum value for this setting.
[ SLim->Strt Speed ]*
The minimum starting speed that must be reached before the CA will allow power application. This is useful for RC drives or systems with sensorless controllers that do not work well from a dead start. The rider must pedal the bike up to StrtSpeed before power is applied.
[ SLim->MxNoPdlSpd ]*
The maximum speed at which the throttle will apply power without pedaling in any PAS mode. This feature supports European pedalec legislation which requires pedaling the bike for motor power, but which provides exemption below a certain speed (e.g. 6kph) in which case use of a throttle without pedaling is permitted. Applies only if a PAS device is installed.
[ SLim->Regen Lmtg ]
Chooser to select if Speed Limiting should use regenerative braking to help control the maximum speed.
Disabled: Speed is limited exclusively by reducing power. Above the speed limit the motor power is reduced to zero, but regenerative braking is not applied allowing the rider to continue to coast or pedal above this speed limit. [Default]
Enabled: Regenerative braking is used to enforce the speed limit setpoint. This means that regen may engage automatically when descending hills even without the rider applying the ebrakes. Proportional throttle regen (EBk->PropRegen) need not be enabled. This feature requires a controller with 0.0 - 0.8V throttle regen function (e.g. Grinfineon or Phaserunner).
[ SLim->IntSGain ]
Integral (I) feedback gain for the speed PID control loop. Lower values give smoother control and less likelihood of hunting, but can increase the time it takes for the speed limit to stabilize. This adjusts the correction for accumulated 'past' speed error.
[ SLim->PSGain ]
Proportional (P) feedback term for the speed PID control loop and displayed in terms of Volts / (mph or kph). If set to 0.5V/kph, the throttle output will immediately drop by 0.5V for each km/hr the bike exceeds the set speed limit. This adjusts the correction for the 'present' speed error.
[ SLim->DSGain ]
Differential (D) feedback term for the speed PID control loop. This is used to dampen speed oscillations by determining the ability of the CA to scale back power in anticipation of breaching the speed limit due to acceleration towards that limit. Values in the 100-300 range seem to work well, but lower values are often required for vehicles capable of hard acceleration. This adjusts the correction for 'future' anticipated speed errors.