Patent ID: 6355998
Filing Date: 2002-03-12
Classification: F16C,H02K

Abstract:
A process of utilizing a sensor arrangement in a bearing-free motor where the bearing free motor includes: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); a sensor arrangement serving for the determination of the direction of the rotor magnetization and/or of the axial position of the rotor (1); the magnetically journalled, permanent magnetic rotor generating a stray field; the improvement to the sensor arrangement comprising: providing at least two sensors (S1, S2, S3) for the determination of a magnetic flux; placing the at least two sensors with respect to the rotor (1) so that the partial fluxes resulting from a stray field of the permanent magnetic rotor (1) can be sensed; and, sensing by each of the at least two sensors the differing partial fluxes of the stray field to determine the magnitude and polarity at each sensor of the partial fluxes resulting from the stray field.