变频驱动电机系统的参数匹配性及静态稳定性分析  

Parameters match and static stability analysis in system of induction motor fed by inverter

作　　者：郭云珺[1] 刘德志[1] 余中军[1] 熊又星[1] GUO Yun-jun;LIU De-zhi;YU Zhong-jun;XIONG You-xing(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033

出　　处：《海军工程大学学报》2018年第5期1-7,24,共8页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助目(51690181;51507181);国家973计划资助项目(2013CB035601)

摘　　要：基于变频驱动异步电机系统小扰动下的数学模型,采用Hurwitz判据及根轨迹法分析了异步电机参数、变频器参数、滤波器参数以及不同运行工况等对系统稳定性的影响规律,并通过仿真和实验证明了理论分析的正确性,最后基于Middlebrook输入输出阻抗判据对该类级联系统的静态稳定性进行了研究,即从物理上对系统失稳进行了分析,结果表明:滤波环节的引入是导致系统静态稳定性下降的主要因素。The system of induction motor fed by inverter may become unstable under some load conditions when the parameters do not match.The small disturbance mathematic model of system is deduced;unstable region is presented and discussed by employing Hurwitz stability criterion as well as the root locus method;parameters and operation conditions that influence system stability are analyzed in detail.The simulation and experiments results verifies the validity of the analysis.Finally,the static stability of the system is analyzed based on Middlebrook input-output impedance creterion,i.e.,to make a physical interpretation of the instability of the system.The result shows that the introduction of the filter is the main factor resulting in the decrease of the static stability of the system.

关 键 词：变频驱动电机 参数匹配 输入输出阻抗 静态稳定性 

分 类 号：TM343[电气工程—电机]