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:
Oct. 23, 2012
Filed:
Jul. 06, 2010
Henry Weissbach, Uhlingen-Birkendorf, DE;
Jens Löffler, Villingen-Schwenningen, DE;
Henry Weissbach, Uhlingen-Birkendorf, DE;
Jens Löffler, Villingen-Schwenningen, DE;
EBM-Papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electronically commutated one-phase motor (') has a stator having at least one winding strand (′), and it has a permanent-magnet rotor () that induces, as it rotates, a voltage (u) in the winding strand. The motor further has an electronic calculation device or microcontroller () which is configured to execute, during operation, the following steps repetitively: sampling the induced voltage (u) in a currentless winding strand, for example, during a half-wave of the induced voltage, in order to obtain a plurality of analog voltage values; digitizing the analog voltage values in order to obtain a plurality of digitized voltage values; and processing the plurality of digitized voltage values to ascertain the instantaneous rotation direction of the motor rotor. The control circuit then can use these data to assure reliable motor start-up, regardless of any external driving forces which occur.