改进型滑模观测器在低速永磁电机中的研究  

Application of Improved Sliding Mode Observer on Low-speed Permanent Magnet Motor

作　　者：曾智波[1] 周腊吾[1] 黄守道[1] 陈国富[1] 

机构地区：[1]湖南大学,湖南长沙410082

出　　处：《电力电子技术》2010年第7期42-43,70,共3页Power Electronics

基　　金：教育部高等学校博士学科点专项科研基金(200805321038)~~

摘　　要：为改善直驱风电系统机侧中无位置传感器低速状态下的稳定性能,提出了一种低速运行状态下的改进型滑模观测法。针对传统滑模观测法在低速运行时的不稳定问题,采用对滑模观测器控制方程的离散化和位置角的在线实时补偿,并用李亚普诺夫函数对其收敛性进行了证明。与传统的观测法相比,该方法低速时的转子角和转速估计误差显著减少,改善了直驱风电系统机侧中存在的低速运行不稳定问题,低速带载能力也明显增强且具有较好的稳定性能,实验结果验证了该方法的可行性和有效性。To improve the low speed performance of permanents magnet synchronous motor（PMSM）in the direct driven wind power system,a kind of improved sliding mode observer（SMO）for sensorless control of PMSM is proposed.Due to SMOs’ instability at low speed,dispersing the controlling equation and compensating the rotor position angle are adopted,and its astringency is proved by the Lyapunov function.Compared with conventional SMOt,he estimation errors of rotor po-sition angle and rotor speed are reduced in low-speed ranget,he low speed performance is improveda,nd the capability of running at low speed in load and the stabilization of system are improved.The experimental results validate the methods’ reliability and availability.

关 键 词：永磁同步电机 滑模观测器 低速运行 

分 类 号：TM351[电气工程—电机]