鼠笼电机起动暂态转子断条Wigner-Ville分布诊断方法  

Diagnosis of broken rotor bars in squirrel cage induction motor during start-up transient based on Wigner-Ville distribution

作　　者：贾朱植 祝洪宇[3] 杨理践[2] 张吉龙[4] 王国庆[2] JIAZhu- zhi1,2,ZHU Hong- yu3, YANG Li- jian2 , ZHANG Ji- long4 , WANG Guo-qing 2(1. Institute of Applied Technology,University of Science and Technology Liaoning,Anshan 114051, China;2. School of Information Science and Engineering,Shenyang University of Technology,Shenyang 110870, China;3. School of Electronic and Information Engineering,University of Science and Technology Liaoning Anshan 114051,China;4. Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016, Chin)

机构地区：[1]辽宁科技大学应用技术学院,辽宁鞍山114051 [2]沈阳工业大学信息科学与工程学院,辽宁沈阳110870 [3]辽宁科技大学电子与信息工程学院,辽宁鞍山114051 [4]中国科学院沈阳自动化研究所,辽宁沈阳110016

出　　处：《电机与控制学报》2018年第7期69-77,共9页Electric Machines and Control

基　　金：中国科学院重点部署项目(KGZD-EW-302);辽宁省自然科学基金(2015010140-301)

摘　　要：鼠笼电机起动暂态破坏了电机电流信号特征分析(MCSA)方法的使用条件,导致该方法无法诊断出起动运行状态下的转子断条故障。针对这一问题,提出鼠笼电机早期转子断条故障Wigner-Ville分布诊断方法。首先,利用离散小波变换对三相定子电流Park矢量模平方信号预处理,借以消除谐波干扰和交叉项影响,然后通过Wigner-Ville分布描述故障特征谐波的能量-滑差变化趋势,并结合其能量测度判断转子断条故障发生与否。在3 k W电机实验台上对所提出的方法进行实验验证,实验结果证实了所提方法的有效性。Motor current signature analysis （MCSA） fails to detect broken rotor bars in an induction motor,due to the fact that assumption of steady-state becomes unavailable during start-up transient.The diagnosis techniques based on Wigner-Ville distribution （WVD） is proposed to resolve the problem.Firstly,preprocessing for square phase-3 stator current Park＇s vector modulus signal was completed by discrete wavelet transform （DWT） for the purpose of eliminating harmonic disturbance and restraining cross-term which prevents diagnosis effectiveness.Then,WVD was conducted on the obtained square Park＇s vector modulus signal.And combining with the evolution of energy-slip curve characteristic pattern and the WVD energy measurement during start-up transient,it is judged if the broken rotor bar defect occurs.The experiment verification was performed on a 3 kW motor experiment test bench.Test results of induction machines operating during start-up transient show the ability of the presented method to detect broken rotor bars.

关 键 词：鼠笼电机 PARK变换 小波变换 WIGNER-VILLE分布 故障诊断 

分 类 号：TM343[电气工程—电机]