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. 19, 1984
Filed:
Sep. 27, 1982
Roland Sudler, Frankfurt am Main, DE;
VDO Adolf Schindling AG, Frankfurt am Main, DE;
Abstract
In a two-phase stepping motor having a rotor (1) with a disk-shaped axially magnetized permanent magnet (8) which has a plurality of poles of constant pole spacing, a first stator part (11) which bears an exciter winding (3) and has first stator poles (15) extending parallel to the face of the permanent magnet (8) and a second stator part (12) which bears an exciter winding (4) and has second stator poles (16) which extend parallel to the face of the permanent magnet (8), the two stator parts (11, 12) are arranged in a single plane, at least in the region of the stator poles (15, 16) and are connected with each other in said plane by intermediate pieces (13, 14) of small magnetic conductance. The first and second stator poles (15, 16) are each divided into two groups (17, 18; 20, 21) which are magnetically separated from each other, the one group (17, 20) being shifted by one rotor-pole spacing from the other group (18, 21 ). The two groups (17, 18) of first stator poles (15) are shifted from the two groups (20, 21) of second stator poles (16) by half a rotor-pole spacing. On that face of the permanent magnet (8) which faces away from the stator poles (15, 16) there is a return flux disk (9) for the induction fluxes coming from the exciter windings (3, 4).