Wesley BC-6200-8SA - Manual (Page 29)

23 Curtis 1268 Manual, Rev. D
3 — PROGRAMMABLE PARAMETERS: Brake Mapping Parameters
Fig. 8 Brake map structure.
Note: Brake Map START
and Brake Map END refer
to the vehicle speeds at
which the regen current
“starts” to increase and
“ends” increasing.
From the operator’s
perspective, however,
braking begins at the
point on the curve
corresponding to the
vehicle’s speed when
braking is initiated, and
then follows the curve
toward “Brake Start.” The
braking force is typically
set to decrease as the
vehicle slows down.
M1/M2/REV BRAKE MAP
The brake map parameter defines the shape of the brake map curve. The value
set for this parameter is a percentage of the regen current between the
BRAKE MIN
and BRAKE MAX values, at the point that is halfway between the BRAKE END and
BRAKE START speeds (the “Brake Map Midpoint”), as shown in Figure 8.
The BRAKE MAP curve is the max allowed regen current, and the shaded
gray area below it is the operating range.
With the BRAKE MAP set at 50%, the motor’s regen current limit decreases
linearly with decreasing speed (from BRAKE END to BRAKE START ), providing a
consistent rate of softening in braking power. Decreasing the BRAKE MAP setting
reduces the regen current attainable at medium speeds. Because the regen cur-
rent limit is reduced as the speed is reduced, the motor will brake more gently
as the vehicle approaches a stop.