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ROTATIONAL-ANGLE DETECTION DEVICE AND ELECTRIC POWER-STEERING DEVICE PROVIDED WITH ROTATIONAL-ANGLE DETECTION DEVICE | DREHWINKELERKENNUNGSVORRICHTUNG UND ELEKTRISCHE LENKVORRICHTUNG MIT DER DREHWINKELERKENNUNGSVORRICHTUNG | DISPOSITIF DE DÉTECTION D'ANGLE DE ROTATION ET DISPOSITIF DE SERVO-DIRECTION ÉLECTRIQUE POURVU D'UN TEL DISPOSITIF

Patentnummer:EP3045870B1
IPC Hauptklasse:G01D000514
Anmelder:
Erfinder:
Anmeldung:24.11.11
Offenlegung:24.11.11
Patenterteilung:27.12.17

Abstract / Hauptanspruch
Misalignment of a rotary shaft (20a) in a radial direction is detected based on the periodic signals of magnetic sensors (Ss1, Sc1, Ss2, Sc2) that are arranged so as to oppose a magnet part (210) provided to rotate integrally with the shaft and magnetized so that a position of an area magnetized as an N pole and a position of an area magnetized as an S pole are alternately switched as the rotary shaft (20a) rotates. Shaft misalignment is detected based on a first sum (Vs12) that is a total of output values (Vs1, Vs2) of two of the four magnetic sensors shifted from each other in the phases by pi and a second sum (Vc12) that is a total of output values (Vc1, Vc2) of the other two of the four magnetic sensors shifted from each other in the phases by pi when at least one of the first sum (Vs12) or the second sum (Vc12) is larger than a threshold (Vref). A corresponding shaft misalignment information (F) is output.

EP3045870B1


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