D42.30-0013-01
Wheel speed sensor, shown on model 638
1 Connecting cable
2 Permanent magnet
3 Coil
4 Pole pin
5 Rotor
Function
When the rotor (5) rotates, magnetic fields are generated, inducing an alternating voltage in the coil (3). This alternating voltage changes frequency according to the wheel speed, i.e. the frequency is proportional to the wheel speed.