Pack Mule PC NXG Series, Manual

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15
Motor
Your Pack Mule NXG vehicle is equipped with an
AC motor system. (Figure 15) This motor requires no
periodic maintenance since it has no brushes to be
replaced.
Figure 15: The motor connected to the Sevcon motor
controller.
Motor Controller
There are no usable serviceable parts in the Sevcon
motor controller. However, it is recommended that
the controller be kept clean and dry to protect it
against corrosion and possible electrical control
problems created by dirt, grime, and chemicals that
are part of the operating environment and that nor-
mally exist in battery powered systems.
Use the cleaning procedure below for routine main-
tenance:
1. Remove power by disconnecting the battery.
2. Discharge the capacitors in the controller by
connecting a load (such as a connector coil or a
horn) across the B+ and B- terminals.
3. Remove any dirt or corrosion from the connec-
tor areas. The controller should be wiped clean
with a moist rag. Dry it before reconnecting the
battery. The controller should not be subjected
to pressured water flow from either a standard
hose or a power washer.
4. Make sure the connections are tight, but do not
overtighten them.
No attempt should be made to open, repair, or oth-
erwise modify the controller. Doing so may damage
the controller and will void the warranty.
Programmable Parameters
Programmable parameters allow the vehicle’s per-
formance characteristics to be customized to fit the
specific vehicle application or environment. Pack
Mule vehicles are programmed with standard default
parameter settings. The five parameters listed below
have the most effect on vehicle behavior and can be
adjusted with the available hand-held programmer.
• Acceleration Rate
• Deceleration Rate
• Throttle
• Maximum Forward Speed
• Maximum Reverse Speed
Acceleration Rate: The time it takes the controller to
accelerate from 0% drive output to 100% drive out-
put. A larger value represents a longer acceleration
time and a gentler start.
Deceleration Rate: The time it takes the controller
to reduce its output when the throttle is reduced or
released. A lower value represents a faster decelera-
tion and thus a shorter stopping distance.
Throttle Map: The control will match the vehicle
speed according to the pedal depression up to the
maximum speed programmed into the controller.
Maximum Forward Speed: The maximum forward
speed parameter defines the maximum controller
voltage output at full throttle in the forward direction.
Maximum Reverse Speed: The maximum reverse
speed parameter defines the maximum controller
voltage output at full throttle in the reverse direction.
The factory settings for these parameters are:
• Accelaration Rate: 1.6 seconds
• Decelaration Rate: 2.5 seconds
• Throttle Map: 50
• Maximum Forward Speed: 70 (approximately 7
mph)
• Maximum Reverse Speed: 35 (approximately 3.5
mph)