Curtis 1244 - Precharge

Curtis 1244 Manual, Rev. E
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PRECHARGE
e precharge parameter enables or disables the precharge function. When
this parameter is set to “On,” the precharge function does not close the main
contactor until the internal power capacitor bank charges to within 10% of the
battery voltage. Charging is accomplished internally and an external precharge
resistor is not required. If the capacitor voltage does not reach this theshold, a
precharge fault is issued and the main contactor is never closed. is reduces
inrush current stresses on the capacitor bank and provides protection against
allowing full battery power to be engaged if there is a short in the output section.
Setting the parameter to “O” disables the precharge function. e precharge
function is required for systems using 48V (or higher) battery packs.
LOAD COMP
e load compensation parameter actively adjusts the applied motor voltage as
a function of motor load current. is results in more constant vehicle speeds
over variations in load and in driving surface (ramps, etc.) without the vehicle
operator having to constantly adjust the throttle position. is parameter will
also help equalize loaded and unloaded vehicle speeds. Higher load compensation
values will cause the controller to be more aggressive in attempting to maintain
vehicle speed. However, too much load compensation can result in jerky vehicle
starts and speed oscillation (“hunting”) when the vehicle is unloaded.
e load compensation parameter is adjustable from 0 to 25. Recom-
mendations for adjusting this parameter are provided in Section 6: Vehicle
Performance Adjustment.
3 — PROGRAMMABLE PARAMETERS: Other Parameters