Nilfisk-Advance CS7000 Fuel Cell EcoFlex, Service Manual

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408 Service Manual – CS7000
Wheel System, Traction
Functional Description
A single rear wheel provides both traction drive and steering. The major components of the drive wheel
system are the drive pedal, drive controller, drive wheel motor, gearbox and drive wheel. The drive wheel
is mounted to a gearbox which carries the vehicle load, provides gear reduction and converts the plane
of rotation from horizontal to vertical. The gearbox is driven by a brush-less three phase AC motor. A
drive controller directly operates the drive motor based on input requests from a drive pedal sensor
(potentiometer) which is mounted on the side of the drive pedal. If you push the pedal forward, the machine
will move forward. If you push it farther forward, the machine will increase speed. If you push the pedal
backward, the machine will move in reverse. The drive pedal is spring loaded in the center or “neutral”
position.
Drive Pedal
Drive Controller
Drive Wheel Motor
Gearbox and Drive Wheel
Drive Pedal
The drive pedal is spring loaded in the neutral position. The drive pedal position sensor is a potentiometer
mounted on the side of the pedal that tracks the pedal position. The sensor is pre-adjusted and comes with
the pedal assembly.
Drive Controller
The drive controller is a self contained sealed unit. It controls when and how the current flows to the stator
windings to rotate the motor based primarily on the drive pedal sensor input, but it also monitors rotational
speed sensors and a temperature sensor inside the motor.