| General | 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. |
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| Analysis Model | 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. |
| Result | 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. |
| Keywords | Magnetic Rotary Sensors, Rotational Speed Sensors, Sensor Sensitivity Analysis, Magnetic Sensor Design |
Fig. 1: 3D Image
Fig. 2: 2D Analysis Model
Fig. 3: External Circuit
Fig. 4: Result 1
Fig. 5: Result 2
Fig. 6: Current Waveform
