摘  要：以三相橋式逆變電路為例，通過計(jì)算機(jī)對(duì)其進(jìn)行Matlab/Simulink建模和仿真，利用Matlab自帶工具箱中的FFT函數(shù)對(duì)故障進(jìn)行特征提取，分別采用BP神經(jīng)網(wǎng)絡(luò)與經(jīng)過PSO優(yōu)化的神經(jīng)網(wǎng)絡(luò)對(duì)電路進(jìn)行故障仿真并進(jìn)行比較分析。仿真結(jié)果表明PSO-BP神經(jīng)網(wǎng)絡(luò)在電力電子裝置故障診斷中收斂性好，診斷精度高。 關(guān)鍵詞：故障診斷  BP網(wǎng)絡(luò)  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]