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. 28, 2008
Filed:
Feb. 04, 2005
Thierry Bieler, Morges, CH;
Laurent Cardoletti, Villeneuve, CH;
Christian Fleury, Bellerive, CH;
Christian Koechli, Yvonand, CH;
Thierry Bieler, Morges, CH;
Laurent Cardoletti, Villeneuve, CH;
Christian Fleury, Bellerive, CH;
Christian Koechli, Yvonand, CH;
Micro-Beam S.A., Neuchatel, CH;
Abstract
An electronic device is provided for controlling a motor having three phases driven by a motor driver. In one implementation, the electronic device includes a detection means and a control circuit. The detection means includes three high-gain differential amplifiers and three A/D converters. The detection means detects back EMF voltages induced by the rotation of the motor and applies corresponding signals to the control circuit. The control circuit computes and filters the position and/or the speed of the motor and then delivers the filtered values of the computed rotor position and/or speed to control the motor driver. The motor may thus be controlled even at near-zero rotational speed.