The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 2002
Filed:
Feb. 27, 2001
Reto Schöb, Volketswil, CH;
Natale Barletta, Zürich, CH;
Levitronix LLC, Waltham, MA (US);
Abstract
A sensor arrangement in an electromagnetic rotary drive which is designed as a bearing-free motor with a magnetically journalled, permanent magnetic rotor ( ) and a stator ( ), the sensor arrangement serving for the determination of the direction of the rotor magnetization and/or of the axial position of the rotor ( ), comprises at least two sensors (S , S , S ) for the determination of a magnetic flux. The two sensors (S , S , S ) are arranged in such a manner with respect to the rotor ( ) that partial fluxes of that magnetic field which the stray field of the permanent magnetic rotor ( ) produces can be determined with them. Furthermore, a method for the determination of the direction of the rotor magnetization is proposed.