Application61 Rotation Detector

A rotation detector is analyzed in the magnetic-transient analysis.
The rotation detector is a sensor placed close to the tooth of the gear to detect frequency signals proportional to the rotation speed.


Fig. 1 is an analysis image in 3D. The detector is placed near the tip of teeth. The detector consists of coil and magnet.
Fig. 2 is a 2D analysis model.
Fig. 3 is an external circuit used for the coil output.
As the results in Fig. 4 and 5 show, the magnetic field distributions vary according to the tooth position.
Fig. 6 shows the output with the external circuit. The current waveform of the coil is output.