Fault Diagnosis Research of TWERD Frequency Converter Based on Wavelet Transform

被引：0

作者：

Wang, Xinsheng ^{[1
]}

Zhang, Huaqiang ^{[1
]}

Zhang, Tianmin ^{[2
]}

机构：

[1] Harbin Inst Technol Weihai, Wenhua Xi Rd 2, Weihai 264209, Peoples R China

[2] Weihai Weidong Ferry Co LTD, Weihai 264200, Peoples R China

来源：

RECENT TRENDS IN MATERIALS AND MECHANICAL ENGINEERING MATERIALS, MECHATRONICS AND AUTOMATION, PTS 1-3 | 2011年 / 55-57卷

关键词：

Frequency converter; Wavelet transform; BP neural network; Fault diagnosis;

D O I：

10.4028/www.scientific.net/AMM.55-57.596

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Taking TWERD frequency converter as research object, the working principle and fault types of three-phase SPWM inverter are analyzed. Its output line voltage waveform in normal operation and fault condition is studied. According to the fault information and the different data of input and load changes, the frequency converter output line voltage waveform is decomposed by wavelet transform. The low frequency energy value is picked-up and regards it as eigenvector. The mapping relationship between eigenvector and fault types are established by BP neural network, the fault bridge and fault location of frequency converter are found. Simulation results show that the diagnosis accuracy is 96.5% after training 46 times. Fast convergence speed and high precision is obtained.

引用

页码：596 / +

页数：2

共 6 条

[1]

Hu Qing, 2008, Proceedings of the CSEE, V28, P107

[2]

Kai R, 2004, IEEE PESC GERM, P4348

[3]

Sun Feng-tao, 2005, Electric Machines and Control, V9, P272

[4]

[汤清泉 TANG Qingquan], 2008, [中国电机工程学报, Proceedings of the Chinese Society of Electrical Engineering], V28, P26

[5]

[吴小华 Wu Xiaohua], 2004, [电力电子技术, Power Electronics], V38, P37

[6]

Zhang Huaqiang, 2008, TWERD FREQUENCY CONV, P21

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