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标题：永磁同步电机分数阶滑模观测器的设计 |
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作者：何克胜，王英 |
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| 2018年第5期 访问次数：305次 |
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摘要：针对传统滑模观测器在估计永磁同步电机(PMSM)电机转速时存在的抖振，以及转子位置与速度的观测精度不高等问题，设计一种基于分数阶微积分理论的滑模观测器。首先，在传统滑模观测器的基础上引入分数阶滑模面，并根据Lyapunov稳定性理论设计出分数阶滑模控制律，利用饱和函数削弱滑模系统的抖振，然后将分数阶理论应用到锁相环中，采用锁相环从反电动势中提取转子位置和速度信息。最后，通过Simulink建立永磁同步电机的无传感器矢量控制模型，仿真结果显示提出的方法具有比传统滑模观测器具有收敛快、抖振小和观测精度高等优点。
关键词：永磁同步电机；分数阶微积分；滑模观测器；锁相环
Abstract: Aiming at the problem that traditional sliding mode observer in the estimation of permanent magnet synchronous motor (PMSM) has the chattering of motor rotation speed, and observation accuracy of the rotor position and speed is not high, a sliding mode observer based on fractional calculus theory was proposed. First of all, the fractionalorder sliding surface was introduced into the traditional sliding mode observer, and the fractional order sliding mode control law was designed by using the saturation function to reduce the chattering of sliding mode system, according to the Lyapunov stability theory. Then fractional theory was applied to the phase locked loop to extract the rotor position and speed information from the back EMF. Finally, the sensorless vector control model of PMSM was established by Simulink. The simulation results show that the proposed method has the advantages of faster convergence, smaller chattering and higher observation accuracy than the traditional sliding mode observer.
Key words: permanent magnet synchronous motor(PMSM); fractional calculus; sliding mode observer(SMO); phaselocked loop(PLL) |
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