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:
Aug. 25, 1981
Filed:
Nov. 06, 1979
Siemens Aktiengesellschaft, Munich & Berlin, DE;
Abstract
An electronic motor has a multi-pole external rotor and a multi-slot stator which is rotatable inside the external rotor. At least two magnetic field sensing elements are arranged in the vicinity of the external rotor and current supply to the stator windings is provided by a commutation device. The prior art stator was provided with obliquely set stator winding slots and involved a complicated winding technique. To eliminate this disadvantage and to be able to use slots lying parallel to the axis, the neutral field lines between each north and south pole of the external rotor are made to lie parallel to the rotor axis in the region of the magnetic field sensing elements and obliquely thereto in the region of the laminated rotor stack.