Apparatus for diagnosing DC link capacitor of inverter
US9535107B2 · kind B2 · utility
4Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 2013 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | May 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure relates to an apparatus for diagnosing a DC link capacitor. A DC voltage provided from a power supplier to a motor is controlled to have a predetermined level (or magnitude). When a voltage of the DC link reaches a predetermined voltage, the ratio of change of capacitance values of the DC link capacitor is estimated, by considering power consumption of a resistor of the motor (i.e., power consumption of a load), power consumption of the power supplier and a switching loss of an inverter part, and a deteriorated level of the DC link capacitor is diagnosed using the estimated ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.