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:
Jan. 24, 1989
Filed:
Aug. 27, 1986
Applicant:
Inventor:
Jean-Claude Berney, Epalinges, CH;
Assignee:
U.S. Philips Corp., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G04F / ; G06F / ;
U.S. Cl.
CPC ...
3241 / ; 318696 ; 368157 ; 377 28 ; 377 50 ;
Abstract
A method of analyzing the voltage induced in an exciter coil of a stepping motor. After energization the exciter coil is loaded by a low impedance so that the induction voltage can produce a current. Subsequently, it is attempted to maintain the current through said coil equal to zero by periodically connecting said coil to a positive or negative voltage. The pattern of consecutive polarities of these periodic energizations is analyzed.