摘要
针对传统的电压型磁链观测器对电机参数变化及外加干扰时鲁棒差等问题,在分析永磁同步电动机数学模型的基础上,提出了一种基于新型定子磁链观测器的永磁同步电动机SVM-DTC控制策略。设计了参考磁链矢量计算模块和一种新的定子磁链观测器,并利用该观测器替换传统的SVM-DTC系统中的电压型定子磁链观测器。理论分析和仿真结果表明该系统设计正确,新磁链观测器能准确估测定子磁链,并能有效地抑制电机定子电感变化,新策略可以拓宽电机调速范围,并改善了系统稳态性能。
Based on the analysis of the mathematical model of PMSM, a novel stator flux estimator was presented, which was applied for space vector modulation （SVM）-direct torque controlled （DTC） permanent magnet synchronous motor （ PMSM ） drives and aimed at the problem of traditional voltage flux linkage estimator and the variety of the motor parameter. The module of reference flux vector and novel stator flux estimator were designed and analyzed, and the simulation model of the system was built. The theoretical analysis and simulation results showed the validity of the proposed system, where the proposed stator flux estimator could estimate the flux accurately and restrain the variable inductance effectively. The proposed scheme developed the range of motor timing and improved the system stability.
出处
《微特电机》
北大核心
2009年第5期35-38,共4页
Small & Special Electrical Machines
基金
教育部新世纪优秀人才支持计划项目(2005-290)
关键词
永磁同步电动机
直接转矩控制
磁链观测器
空间矢量调制
permanent magnet syehronous motor
direct torque control
flux linkage estimator
space vector modulation
