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. 06, 2002
Filed:
Dec. 04, 2000
Fritz Schmider, Homberg, DE;
Stefan Lukenich, Singen, DE;
Papst Motoren GmbH & Co. KG, St. Georgen, DE;
Abstract
An electronically commutated motor ( ) has a permanent-magnet rotor ( ) and has a stator ( ) that has two winding phases ( ). During one rotor rotation of el., firstly current is delivered to the one winding phase ( ) within a first rotation angle range via an associated first semiconductor switch ( ); and within a subsequent second rotation angle range, current is delivered to the other winding phase ( ) via an associated second semiconductor switch ( ). The motor further has a commutation apparatus for alternatingly switching ON the first semiconductor switch ( ) and the second semiconductor switch ( ). This commutation apparatus comprises a bistable multivibrator (FF ) whose switching state is controlled, via at least one comparator ( ), by the voltage that is induced by the permanent-magnet rotor ( ) in that winding phase ( or ) which is currentless at that instant and which, in the instantaneous rotation angle range of the rotor ( ), is not being supplied with current via its associated semiconductor switch ( or ).