oil level AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System

26
System components
Function
The exciter coil is subjected to an alternating
current which produces an electromagnetic
alternating field, the induction of which is
penetrated by the rotor.
The current induced in the rotor produces a
second electromagnetic alternating field
around the conductor loop (rotor).
Both alternating fields, from the exciter coil
and from the rotor, act on the receiver coils
and induce corresponding alternating
currents in them.
While the induction of the rotor is
independent of its angle position, induction
of the receiver coils depends on their
distance from the rotor and thereby on its
angle position.
As the rotor, depending on its angle position,
overlaps differently with regard to each
receiver coil, their voltage amplitudes vary in
accordance with the angle position of the
rotor.
The evaluation electronics compensate the
alternating currents of the receiver coils,
amplify them and produce proportional
output voltages for the three receiver coils
(proportional measurement). After voltage
evaluation, the result is converted into output
signals for the level sensors and transmitted
to the control units for further processing.
0
0
0
243_036
243_037
Exciter coil
Stator
Rotor
3 receiver coils
Conductor loop
(induced current)
U
1
U2
U3
Voltage amplitudes depending on the position of
the rotor with regard to the receiver coil
(example of a rotor position)
U1
U2
U3
Time
Time
Time
1st magnetic
field at the
exciter coil
2nd magnetic
field in the
conductor loop