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:
Nov. 18, 1980
Filed:
Jan. 11, 1979
Applicant:
Inventors:
Lawrence W Langley, Christiansburg, VA (US);
H Keith Kidd, Christiansburg, VA (US);
Assignee:
Kollmorgen Technologies Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318696 ; 318685 ; 318254 ; 318135 ;
Abstract
A closed loop control system for variable reluctance stepper motors which senses a voltage indicative of motion on the driven windings, uses this voltage to confirm that motion has occurred, compares this voltage with one modeled after a waveform indicative of no motion and effects successive changes in the winding drive states at optimum times.