摘  要：以三相橋式逆變電路為例，通過計算機對其進行Matlab/Simulink建模和仿真，利用Matlab自帶工具箱中的FFT函數(shù)對故障進行特征提取，分別采用BP神經(jīng)網(wǎng)絡與經(jīng)過PSO優(yōu)化的神經(jīng)網(wǎng)絡對電路進行故障仿真并進行比較分析。仿真結果表明PSO-BP神經(jīng)網(wǎng)絡在電力電子裝置故障診斷中收斂性好，診斷精度高。 關鍵詞：故障診斷  BP網(wǎng)絡  FFT函數(shù)  PSO Abstract: In the case of three-phase bridge inverter circuit, when going wrong ,at first decompose fault signal of circuit with the wavelet packet and extract [登陸后可查看全文]