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:
Dec. 17, 2002
Filed:
Sep. 19, 2000
Roland Dieterle, St. Georgen, DE;
Hermann Rappenecker, Vöhrenbach, DE;
Alexander Hahn, Boll, DE;
Papst-Motoren GmbH & Co. KG, St. Georgen, DE;
Abstract
An improved method, for obtaining a datum concerning the rotation speed (n) of a rotating object, such as a motor rotor ( ), offers high precision. Typically, the motor has a sensor ( ) which supplies a sensor signal that has, for each revolution of the rotor, a plurality A of events such as pulses or pulse edges which are counted by a microprocessor ( ) associated with the motor. In order to keep the computation load on the microprocessor from increasing as the rotor speed increases, yet maintain high precision, the measurement is done over a full rotation of the rotor, starts at a first signal event ( ), and ends after a third or nth signal event ( ) which happens at the same rotational position as the first signal event.