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Automated Manual Transmission
11
1
CSC position sensor connector
2
Pipe attachment
3
CSC position sensor
4
CSC
PLCD Clutch Position Sensor:
PLCD displacement sensors (Permanent
magnetic Linear Contactless Displacement
Sensors). They essentially consist of a special
magnetic core wound with a coil on its whole
length. A second coil is present on each end
of the core.
The displacement of a permanent magnet
near the sensor changes the magnetic field
and thus varies the voltage of the end coils.
The sensor has an integrated circuit which
also produces the output signal.
P
Main coil
S1 – S2
Secondary coil
M
Permanent magnet
Operation:
The main coil, which receives an alternating
voltage from an external generator, creates a
magnetic field in the sensor core. This mag-
netic field induces the voltages V1 and V2 in
the S1 and S2 secondary coils. The secondary
voltages are wound and connected so that
the total voltage is given by VS = V1 + V2.
With the magnet in central position the out-
put voltage VS = 0 Volt because V1 = - V2.
When the magnet moves to one end, the
magnetic field in the coils S1 and S2 changes
and, as a consequence, it increases on one
side and decreases on the other side.
This difference in the magnetic field causes a
variation in the voltages V1 and V2. As soon
as the magnet moves, the output voltage
(VS) starts to increase.
.