Method for static eccentricity fault detection of induction motors
US11411521B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2020 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Feb 4, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for controlling an operation of an induction motor (IM). A controller processor detects a spectrum of a current signal from received sensor data using a module. Obtain a number of rotor bars and a number of pole pairs of the IM to identify a principle slot harmonics (PSH) type IM from stored IM data. Use the PSH-type IM to identify a static eccentricity (SE) fault signature signal located at a secondary PSH frequency of the PSH-type IM. Determine a level of signal strength in the spectrum of the current signal at a location of the secondary PSH frequency, and compare to a SE fault table database to obtain a SE fault level of the PSH-type IM. Compare the SE fault level to a database to obtain a SE fault threshold, and if the SE fault level is outside the SE threshold, generate an interrupt command to the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.