Cub Cadet Fun Runner - Manual (Page 9)

2-3
without overcharging. It is desirable to leave the
charger plugged in for long periods periodically
to equalize the charge of the battery pack
modules. Doing this will increase battery life.
Electric Drive Motor
The FunRunner uses a 48-volt brush type DC
motor. The motor uses permanent magnets for
the field and has a wound armature with a
commutator that the brushes ride on. See
Figure 2-5.
Figure 2-5:
The motor is connected to the rear wheels
through a fixed ratio drive axle with differential.
Reverse for the FunRunner is accomplished by
reversing the direction of rotation of the electric
drive motor. There are no reverse gears in the
drive assembly. The motor receives power from
the controller.
The motor has no serviceable parts and is
replaced as an assembly if it fails. There is a
speed sensor located on the spacer between the
motor and drive axle. The speed sensor is
supplied as a service part. See Figure 2-6.
Figure 2-6:
Motor Controller Assembly
The motor controller assembly on the
FunRunner is located just ahead of the trunk
basket panel under the rear body section. See
Figure 2-7. The controller is rated at 150 amps
and 48 volts. It is a four-quadrant controller that
uses pulse width modulation. The four-quadrant
design allows the motor to be reversed,
eliminating the need for a mechanical reverse
gear. The pulse width modulation ensures
smooth acceleration and power delivery while
operating at an extremely high efficiency level.
Figure 2-7:
Figure 2-8:
The controller can be switched to either high or
low forward speeds or reverse. See Figure 2-8.
When selected to high speed, the controller will
allow a maximum speed of 12 mph. In low
speed mode, the controller will reduce the output
voltage as needed to reduce the max speed to 8
mph. Reverse mode is 6 mph maximum.