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中文摘要：
采用基于波形直接分析的神经网络故障诊断方法实现电力电子电路在线故障诊断。以三相整流电路为例，对电路发生故障时输出的波形进行分析，用故障波形的采样数据制作的样本对神经网络进行训练，将训练好的神经网络用于故障诊断。仿真实验表明该方法是有效的。
英文摘要：
Based on neural network, a new on- line fault diagnosis method for power electronic circuits is presented. The example of rectifier circuit is taken. After analyzing the output waveforms of fault circuit and training a BP neural network with the sampling data of fault waveforms, a well training BP neural network is constructed and used to diagnose the fault. The simulation and experiment demonstrate that this method is valid.
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