Fault diagnosis method for series hybrid electric vehicle AC/DC converter
US10725084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2018 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jul 19, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/904
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fault diagnosis method for a series hybrid electric vehicle AC/DC (Alternating Current/Direct Current) converter, implementing identifying and diagnosing of an open circuit fault of a power electronic components in an AC/DC converter, and including the following steps: first, establishing a simulation model for a series hybrid electric vehicle AC/DC converter, and selecting a DC bus output current as a fault characteristic; then classifying fault types according to a quantity and locations of faulty power electronic components; next, decomposing the fault characteristic, that is, the DC bus output current by means of fast Fourier transform to different frequency bands, and selecting harmonic ratios of the different frequency bands as fault diagnosing eigenvectors; and finally, identifying the fault types by using a genetic algorithm-based BP (Back Propagation) neural network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.