摘要
设计并实现了一种将反电势估算值反馈引入到定子电流观测计算中的新型滑模观测器转子位置估算方法。为了简化调速系统硬件结构,设计了一个截止频率可随转子转速变化的低通滤波器。基于对新型滑模观测器算法稳定性的分析,提出了反电势反馈增益系数的自适应算法,通过该系数的自适应调节可以实现不同速度运行时转子角度估算误差的补偿。引入锁相环控制对永磁同步电机(permanent magnet synchronous motor,PMSM)的转速进行估算。建立基于新型滑模观测器算法的无传感器PMSM矢量控制调速系统并进行实验测试,试验验证了该新型滑模观测器估算方法能够在PMSM较低速运行时准确的估算出转子位置和速度,无传感器矢量控制调速系统具有调速范围宽、鲁棒性强的特点,且该无传感矢量控制算法简单、易于实现。
A novel sliding mode observer with estimated back-EMF（electromotive force） feeding back to the calculation of stator current observation was designed and implemented.In order to simplify the hardware structure of the speed control system,a low pass filter with a cut-off frequence changing with the rotor speed was designed.The adaptive algorithm of the back-EMF gain was proposed based on the analysis of the novel sliding mode observer＇s stability,and the compensation of estimated rotor position error could be realized through regulating the feedback gain.The permanent magnet synchronous motor（PMSM） speed estimation function was achieved by a phase-locked loop（PLL）.A PMSM sensorless vector control system based on the novel sliding mode observer was set up and experiments are implemented on the platform.The experimental results verified that the estimation method based on the novel sliding mode observer could accurately estimate the rotor position and speed at very low speed.Speed sensorless vector control system had the characteristics of a wide speed range and robustness.Furthermore,the algorithm of the sensorless control was simple and easily achieved.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第33期78-83,共6页
Proceedings of the CSEE
关键词
滑模观测器
无传感器
锁相环
自适应
永磁同步电机
sliding mode observer
sensorless
phase-locked loop
adaptive
permanent magnet synchronous motor（PMSM）
