J. Phys. IV France 08 (1998) Pr2-821-Pr2-824
A new permanent magnet angular position sensorA. Foggia, J.-P. Yonnet and S. Adenot
Laboratoire d'Électrotechnique de Grenoble, UMR 5529 du CNRS, INPG/UJF, ENSIEG, BP. 46, 38402 Saint-Martin-d'Hères cedex, France
This paper present a new structure of a magnetic sensor. The output signal is proportional to the angular position. The originality of the structure comes from is desing that permits the measurement of the sum of two magnetic inductions which is a constant. This allows the output signal to be insensitive to some external parameters such as the temperature. The hysteresis of the soft magnetic materials generates a hysteresis in the output signal of the sensor. Low coercive field materials must be used, like Fe Ni, to limit this effect. However, this does not affect sensibly the total cost of the sensor.
© EDP Sciences 1998