Variable frequency drive and methods for filter capacitor fault detection
US8937796B2 · kind B2 · utility
8Cited by
25References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 26, 2012 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Apr 11, 2033 |
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 currents and/or voltages and detecting changes in a frequency component of the measured neutral condition and/or based on input current unbalance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.