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:
May. 28, 2002
Filed:
Nov. 30, 2000
Fritz Schmider, Hornberg, DE;
Stefan Lukenich, Singen, DE;
Papst Motoren GmbH & Co. KG, St. Georgen, DE;
Abstract
An electronically commutated motor ( ) has a stator ( ) with two winding phases ( ) which are alternatingly supplied with current during one rotor rotation through ° cl. The motor also has a permanent-magnet rotor ( ) which, when the motor ( ) is currentless, assumes at least one predefined rotational position from which the rotor starts in a desired rotation direction upon excitation of a predefined winding phase. A bistable multivibrator ( ), which is controlled by the voltage that is induced by the rotor in the instantaneously currentless winding phase, is provided for alternatingly switching on the two winding phases. The bistable multivibrator ( ) has an electrical preferred position ( ) that it assumes when the motor ( ) is switched on, in order to supply power, during the switching-on operation, to the predefined winding phase and thereby to allow the rotor to start in the desired rotation direction. The motor current can be temporarily increased at startup in order to increase the torque at startup.