Method and device for predicting electrolytic capacitor defects, converter and uninterruptible power supply equipped with such a device
US8090548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2008 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Mar 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/64
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and device for predicting defects of a capacitor, the method including determining the ripple voltage (Udc), the temperature (TP), and the current (Ic) of the capacitor, determining the value of an equivalent series resistance (ESR) of the capacitor, and the capacitance value (C) of the capacitor using a digital filter, determining information representative of the state of aging of the capacitor according to the temperature of the capacitor, and displaying that information and information representative of the value of the capacitance (C) and/or information representative of a cause associated with the state of aging according to the capacitance value. The device may include a converter and an uninterruptible power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.