摘要
以磁悬浮高速永磁同步电机为研究对象,针对传统滑模观测器算法预测转子位置存在的固有抖振问题,提出一种改进的滑模观测器预测转子位置的方法。采用正弦函数的[-π/2,π/2]部分取代传统滑模观测器中的符号函数作为切换控制函数,并且通过选择合适的切换控制函数边界层厚度以及随转速变化改变滑模增益来减少抖振现象。同时,设计了截止频率随转速变化的低通滤波器对估计反电动势滤波,分析了转子位置估算误差,并提出了补偿方案。最后以4kW表贴式磁悬浮高速永磁同步电机为对象进行了仿真和实验,结果表明:改进的滑模观测器法很好地抑制了抖振现象,补偿了估计误差,能够准确地预测磁悬浮高速永磁同步电机大转速范围的转子位置,并且具有鲁棒性强的优点。
Taking magnetic suspension high speed permanent magnet synchronous motor（HSPMSM） as the object of study, an improved sliding mode observer （SMO）, which substitutes the part between -7π/2 and 7π/2 of a sine function for the sign function, is designed to reduce the chattering problem. By selecting an appropriate boundary layer and changing the sliding mode gain according to the rotor speed, the chattering problem can be suppressed. A low pass filter with a cut-off frequency changing with the rotor speed was designed. The position estimation error was analyzed and a compensation method was proposed. Simulations and experiments with a 4-kW magnetic suspension HSPMSM were carried out. The results demonstrate that the SMO suppresess the chattering problem, compensates estimation error and estimates the rotor position accurately in a wide speed range.
出处
《电机与控制学报》
EI
CSCD
北大核心
2013年第9期42-47,56,共7页
Electric Machines and Control
基金
国家重大科学仪器设备开发专项(2012YQ040235)
航空基金(2012ZB51019)
北京市科技创新基地培育与发展工程专项项目(Z131104002813105)
关键词
磁悬浮高速永磁同步电机
滑模观测器
转子位置估计
切换控制函数
误差补偿
magnetic suspension high speed permanent magnet synchronous motors
sliding mode ob-server
rotor position estimation
switching function
error compensation
