SECTION 22 – ELECTRICAL SYSTEM AND TESTING: ELECTRIC
VEHICLES
22
DANGER
• See General Warning on page 1-1.
WARNING
• See General Warning on page 1-1.
GENERAL INFORMATION
The IQ Plus vehicle uses a 48-volt electrical system that is powered by eight 6-volt lead-acid batteries and includes an
onboard computer. The IQ Plus vehicle uses a shunt-wound 3.7 hp motor and includes several additional features.
•
Shunt-Wound Motor:
The shunt-wound motor, unlike a series motor, is designed so that the speed controller is
able to vary the amount of current passing through the field coils independently from the current passing through
the armature.
•
Motor Braking:
Under certain conditions a shunt-wound motor also has the ability to act as an electrical brake to
slow the vehicle. There are three features of the IQ Plus electrical system which will activate the motor braking
function: Walk Away Braking, Pedal Down Motor Braking, and Pedal Up Motor Braking (adjustable with the
IQDM-P handset).
•
Walk Away Braking:
the walk away braking feature will prevent the vehicle from rolling at more than 1 or 3 mph
(1.5 or 4.8 km/h) unless the accelerator is pressed. This prevents the possibility of a parked vehicle (with the park
brake disengaged) rolling away too fast to be overtaken on foot. If the walk away braking function remains engaged
for two seconds or more, a warning buzzer will sound to alert the driver that motor braking has been activated.
WARNING
• Walk away braking will not limit vehicle speed to 1 mph (1.6 km/h) on very steep grades. Do not
operate vehicle on slopes exceeding 20% grades.
•
Pedal Down Motor Braking:
This feature helps to control vehicle downhill speed. Motor braking is activated when
the vehicle reaches the programmed top speed and holds the vehicle at that speed. Motor braking is automatically
disengaged when vehicle speed slows below the programmed top speed.
•
Pedal Up Motor Braking (adjustable):
Speed settings are programmable for IQ Plus vehicles. Motor braking is
activated when the accelerator pedal is released at or above the programmed speed. When the vehicle slows to
the programmed lower speed, motor braking will disengage. If no speed settings are programmed, motor braking
will be activated at any time accelerator is released, and it will only disengage when the vehicle comes to a stop.
Contact your Club Car dealer/distributor to inquire about this programmable feature.
•
Regenerative Braking
: When motor braking is activated, the vehicle motor acts as a generator, slowing the vehicle
as it creates energy that is used to charge the batteries.
2007-2009 Turf 252, Carryall 252 and XRT 900 Maintenance and Service Manual
Page 22-1
