Variable frequency drive and methods for filter capacitor fault detection
US8259426B2 · kind B2 · utility
22Cited by
10References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 2010 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Dec 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node current and/or voltages and detecting changes in the fundamental frequency component of the measured neutral condition at the fundamental frequency of the input power and/or based on input current unbalance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.