Section 6
Page 31
Service Training
6.3 STEERING
6.3.1 LES steering Operating principle
Steering power part 3A1
The new electric steering system is equipped with a motor with permanent magnets. The armature is
controlled by 4 MOSFET transistors that controlled 2 by 2 turn the motor in the 2 directions of rotation, left
and right. The steering motor rotation speed depends only on the difference between the position of the
set value potentiometer and the position of the wheel potentiometer.
The motor stops turning when this difference is zero (with a certain tolerance range, to prevent permanent
steering correction, and to push the motor too much).
The use of a motor with permanent magnets helps have a larger power, for a smaller size than the old
system.
ATTENTION : Before opening the motor, mark the position of the bodywork, this position is adjusted in
the factory to optimise switching (brush setting). Only a service hatch is provided for blowing the brushes.
STEERING MOTOR REDUCER
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