Angular position detector employing magnetoresistors positioned in pairs at an electrical angle of one hundred and eighty degrees

摘要

Detector of angular position comprising a stator (1) and a toothed rotor (3) in relative rotation. The stator (1) has magnetoresistors (M1 through M8) in pairs and preferably numbering four or a multiple of four. The magnetoresistors in each pair are almost diametrically opposed and in electrical phase opposition to eliminate magnetic torques on the rotor (3) . The use of at least two pairs allows a useful signal to be easily obtained for all angles if the signals of the pairs are out of phase at a 90° electrical angle. The detector provides a very high degree of precision, strength and low energy consumption.