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:
Mar. 17, 1992
Filed:
Feb. 11, 1991
James P Lyons, Niskayuna, NY (US);
Stephen R MacMinn, Schenectady, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method and apparatus for indirectly determining rotor position in a switched reluctance motor (SRM) are based on instantaneous flux and phase current sensing. For each phase in a predetermined sequence of phase sensing, which depends on the particular quadrant of machine operation, phase flux and phase current measurements are made during operation in a pair of predetermined sensing regions each defined over a range of rotor angles. Rotor angle estimates are derived from the flux and phase current measurements made during the sensing region for each respective phase. The rotor angle estimates for each phase are normalized with respect to a common reference and then used to generate a rotor position estimate for the SRM.