Patent ID: 6222290
Filing Date: 2001-04-24
Classification: F16C,H02K

Abstract:
A sensor arrangement in a bearing-free motor including;a magnetically journalled, permanent magnetic rotor (1);a stator (2) designed as a bearing and drive stator to journal the permanent magnetic rotor (1) without contact by means of magnetic forces and to rotate the permanent magnetic rotor (1) by means of magnetic forces from the stator (2); and,the sensor arrangement serving for the determination of the direction of the rotor magnetization and/or of the axial position of the rotor (1);the improvement to the sensor arrangement comprising:at least two sensors (S1, S2, S3) for the determination of a magnetic flux; the at least two sensors arranged with respect to the rotor (1) so that differing partial fluxes can be determined in magnitude and polarity by each of the at least two sensors, the partial fluxes resulting from a stray field of the permanent magnetic rotor (1).