Filter capacitor degradation identification using measured and expected voltage
US9389263B2 · kind B2 · utility
17Cited by
41References
21Claims
0Family size
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Key dates
| Filing date | Jun 5, 2014 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Jan 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus are presented for detecting degrading filter capacitors in motor drives or other power converters, in which an expected DC equivalent voltage and a measured DC equivalent voltage are computed according to sampled filter circuit currents and voltages, and compared to selectively identify filter capacitor degradation conditions in a power converter filter circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.