Method for diagnosing fault of LLC resonant converter based on resonant capacitor voltage
US11391789B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2021 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Mar 11, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33573
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a method for diagnosing an open fault of an LLC resonant converter based on a resonant capacitor voltage, including: specifying a proper threshold based on an amplitude of a resonant capacitor voltage when an LLC resonant converter works normally; sampling the resonant capacitor voltage after a fault occurs, and comparing the sampled resonant capacitor voltage with the specified threshold to diagnose the fault; and controlling phase shifting between bridge arms to locate the fault. Characterized by a high diagnosis speed, a low misdiagnosis rate, and good robustness, the method for diagnosing an open fault of an LLC resonant converter in the present disclosure is of great significance for ensuring uninterrupted running of the LLC resonant converter when the open fault occurs on the LLC resonant converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.