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, 2025
Filed:
Nov. 29, 2021
Southeast University, Jiangsu, CN;
SOUTHEAST UNIVERSITY, Jiangsu, CN;
Abstract
A linear Hall-based eccentricity diagnosis method and detection system for a permanent magnet motor. First, three linear Hall elements are mounted in stator slots at the same space interval, respectively; second, analog signals output by the three-phase linear Hall are converted into digital signals by means of a digital signal processor, and the digital signals are converted into a quadrature signal by means of linear combination; then, a negative sequence signal and a sideband signal are extracted from the quadrature signal by means of a complex factor filter; then the amplitude of the negative sequence signal and the amplitude of the sideband signal are extracted by means of synchronous reference frame phase-locked loops as a static eccentricity indicator and a dynamic eccentricity indicator; finally, percentages representing the degrees of eccentricity are calculated from the static eccentricity indicator and the dynamic eccentricity indicator in the digital signal processor.