Inductive Sensors and Electromagnets

Inductive sensors utilize inductance change
• as a result of the movement of a ferromagnetic core within the coil
• due to an approaching ferromagnetic material

The position sensor Figure 3.26: (a) Core shifted flat (b) Core I bergser spin (c) The series of variable inductance

Reader circuit inductance change
• two inductors arranged in a bridge circuit, one as a dummy
• bridge bias voltage ac signal form
• induktasi changes linearly converted into a voltage change

KL = sensistivitas inductance of the position

• output ac voltage is converted to dc or read using the phase detector

Figure 3.27 test circuit inductive position sensors

Terbangkitkannya tapped electromagnetic sensor emf force by the coil changing magnetic field
• output voltage proportional to the speed of change in the position of the source of the magnetic coil

• changes in the magnetic field is obtained by the movement of the magnetic field source or the movement of the coil (such as the microphone and loudspeaker)

Figure 3.28 The use of the position sensor: (a) on the microphone, (b) on the loudspeaker