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:
Sep. 23, 2014
Filed:
Nov. 11, 2008
Jens Wagner, Langen, DE;
Armin Dietrich, Aschaffenburg, DE;
Kai Dieffenbach, Egelsbach, DE;
Marco Bodenmüller, Waghäusel, DE;
Jürgen Rohn, Rodgau, DE;
Wolfgang Wiewesiek, Darmstadt, DE;
Jens Wagner, Langen, DE;
Armin Dietrich, Aschaffenburg, DE;
Kai Dieffenbach, Egelsbach, DE;
Marco Bodenmüller, Waghäusel, DE;
Jürgen Rohn, Rodgau, DE;
Wolfgang Wiewesiek, Darmstadt, DE;
Spansion LLC, Sunnyvale, CA (US);
Abstract
An electrical stepper motor comprises a magnetical rotor and at least two electromagnetical driving coils for causing rotation of the rotator. A method of detecting an operating condition of the as e.g. a stall state of the electrical stepper motor comprises the steps of connecting one contact pin (P, M) of at least one of the electromagnetical driving coils via a high-impedance resistor (R, R) to a defined voltage source during a non-activated state of the driving coil, detecting a voltage induced at the driving coil during the non-activated state and converting the detected voltage into a digital signal, and digitally analyzing the digital signal and deriving an operating condition of the rotor by evaluation of the signal waveform including positive and negative components of the signal.