Open-circuit fault diagnosis method for Si/SiC hybrid H-bridge inverter power device applicable to grid-source-storage-vehichle energy management system
US12385983B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2025 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Mar 24, 2045 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An open-circuit fault diagnosis method includes: S1, injecting a switching sequence into a second driving mode of the power device; S2, collecting inverter data and calculating a first output voltage residual; determining whether the first output voltage residual enters a voltage threshold region, and obtaining a first fault flag; if yes, proceeding to step S3; else proceeding to step S4; S3, injecting the switching sequence into an all-driving mode of the power device, collecting inverter data and calculating a second output voltage residual; determining whether the second output voltage residual enters the voltage threshold region, and obtaining a second fault flag; S4, collecting inverter data and calculating a first inductor current pulsation value; and determining whether the first inductor current pulsation value pulsates within an inductor current pulsation region, and obtaining a third fault flag; and S5, performing open-circuit fault diagnosis on the power device based on the fault flags.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.