大电机技术
大電機技術
대전궤기술
LARGE ELECTRIC MACHINE AND HYDRAULIC TURBINE
2009年
4期
20-23
,共4页
小波包%无刷直流电机%匝间短路%特征提取
小波包%無刷直流電機%匝間短路%特徵提取
소파포%무쇄직류전궤%잡간단로%특정제취
wavelet packet%BLDC%inter-turn short circuit%feature extraction
通过分析无刷直流电机定子绕组匝间短路故障原理,建立其数学模型.利用小波变换的能量与原始信号的能量之间存在着等价关系及小波包分析良好的全频带分解特性,将匝间短路故障信号进行小波包分解,计算出各频带所占能量,进而获取能量分布形式的早期匝间短路故障特征.仿真结果表明此种方法简洁有效.
通過分析無刷直流電機定子繞組匝間短路故障原理,建立其數學模型.利用小波變換的能量與原始信號的能量之間存在著等價關繫及小波包分析良好的全頻帶分解特性,將匝間短路故障信號進行小波包分解,計算齣各頻帶所佔能量,進而穫取能量分佈形式的早期匝間短路故障特徵.倣真結果錶明此種方法簡潔有效.
통과분석무쇄직류전궤정자요조잡간단로고장원리,건립기수학모형.이용소파변환적능량여원시신호적능량지간존재착등개관계급소파포분석량호적전빈대분해특성,장잡간단로고장신호진행소파포분해,계산출각빈대소점능량,진이획취능량분포형식적조기잡간단로고장특정.방진결과표명차충방법간길유효.
The mathematical model of brushless DC motor is established through the analysis of the fault principle of stator windings. For the advantage of the full-band characteristics decomposition of wavelet analysis and by the use of the equivalent energy relationship between wavelet transform and the original signal, inter-turn short-circuit signal is decomposed by wavelet packet, the energy of every band are calculated, and then early feature of inter-turn short-circuit is obtained in the form of energy distributions. The effectiveness of the proposed method is validated by simulation results.
