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:
Jun. 02, 1992
Filed:
Dec. 14, 1990
Leo Bertram, Stolberg, DE;
Hugo Schemmann, Schaesberg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a two-pole single-phase synchronous motor having a permanent-magnet rotor (11), a magnetic detent torque, which viewed over one revolution exhibits positive and negative values with resulting stable and unstable rest positions, the stable rest positions being offset in the positive direction relative to the average direction of the stator field (39) by the asymmetry angle (.gamma.), and a critical detent torque (M.sub.K1kr) being active in the parallel position of the stator field (9) and the rotor field (41), and a starting device provided with rotational backlash between a driving member connected to the rotor (11) and a load member, and with a directional blocking device (22).