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:
Dec. 21, 1993
Filed:
Oct. 01, 1990
Applicant:
Inventors:
Thomas A Lipo, Madison, WI (US);
Julio C Moreira, Madison, WI (US);
Assignee:
Wisconsin Alumni Research Foundation, Madison, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318808 ; 318802 ;
Abstract
Methods and apparatus are provided wherein air gap flux magnitude and relative position are determined from stator voltage harmonic components and stator current in operating alternating current machines having a stator, a rotor and an air gap therebetween. Such determinations have various uses, such as for efficiency control. Various new and improved efficiency controllers are provided which utilize these measurements.