基于模糊滑模控制器和两级滤波观测器的永磁 同步电机无位置传感器混合控制

Sensorless hybrid control for permanent magnet synchronous motor using fuzzy sliding mode controller and two-stage filter observer

中文关键词  永磁同步电机  新型趋近率  模糊积分滑模控制器  两级滤波  滑模观测器

英文关键词  permanent magnet synchronous motor (PMSM)  novel reaching law  fuzzy integral sliding mode controller  two-stage filter  sliding mode observer

中文摘要

      针对传统带有滑模观测器的永磁同步电机控制系统中的转矩脉动大、抖振明显、反电动势估计精度差等 问题, 在速度环提出了基于双曲正弦函数的新型趋近率, 结合模糊控制思想对趋近率参数实现自整定, 设计了一种 基于新型趋近率的模糊积分滑模速度环控制器; 同时, 在滑模观测器中提出基于变截止频率低通滤波器和修正反 电动势观测器的两级滤波结构来抑制反电动势中的高频分量和纹波分量, 并对转子位置进行合理补偿, 设计了两级 滤波滑模观测器; 通过Lyapunov判据对本文提出的控制策略的稳定性进行了推导证明. 仿真结果表明, 与传统滑模 观测器相比, 本文控制器可使电机在启动和受到外部扰动时系统响应良好.

英文摘要

      Aimed at the problems of large torque ripple, obvious chattering and poor estimation accuracy of back-EMFs in traditional PMSM (permanent magnet synchronous motor) control system with sliding mode observer, a novel reaching law based on hyperbolic sine function is suggested in the speed loop, and fuzzy control thought is used to achieve the selfturning of the parameter for the reaching law. Thus a fuzzy integral sliding mode controller based on the novel reaching law is designed in speed loop. Meanwhile, aiming to restrain the high frequency components and ripple components of back-EMFs in sliding mode observer, a two-stage filter structure based on a variable cut-off frequency low-pass filter and a modified back-EMFs observer is proposed, and the rotor position is compensated reasonably. As a result, a sliding mode observer based on the two-stage filter is designed. The stability of the proposed control strategy is proved by Lyapunov Criterion. The simulation results show that, compared with traditional sliding mode observer (SMO), the controller suggested above can obtain very nice system respond when the motor starts and is subjected to external disturbances.