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FAULT DIAGNOSIS METHOD FOR SERIES HYBRID ELECTRIC VEHICLE AC/DC CONVERTER
FAULT DIAGNOSIS METHOD FOR SERIES HYBRID ELECTRIC VEHICLE AC/DC CONVERTER
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机译:串联式混合动力汽车交/直流转换器的故障诊断方法
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摘要
A fault diagnosis method for a series hybrid electric vehicle AC/DC 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 neural network.
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