AC Voltage Signals

Inductive Signals (Induced Voltage)

• Inductive sensors produce an AC Sine Wave (see below) signal.
• The AC voltage is induced by the shifting of a magnetic field.
• The sensor consists of an impulse wheel (the moving part), and a coil wound magnetic core (stationary part).

As each “tooth” (spike) of the impulse wheel approaches the sensor tip, the magnetic field of the sensor shifts toward the impulse wheel and induces a voltage pulse in the windings.

As the teeth move away from the sensor, the magnetic field shifts back inducing a voltage pulse in the opposite direction.

This shifting of the magnetic field produces an alternating current (Positive to Negative).

Control Module(s) which receive this alternating current, count the impulses (count shifts from positive to negative), and interpret the speed of rotation of the impulse wheel.

Graphical Flow Diagram of AC Voltage Signal

AC Voltage Sine Wave

AC Type Signals