基于IMM的永磁电机无速度传感器技术

摘要

提出一种新颖的基于 IMM算法的电机转速、转子位置观测器，用于永磁电机无速度传感器矢量控制系统的转速等参数辨识。以期削弱滑模观测器的抖动，提高模型参考自适应观测器的动态性能。该方法基于交互式多模型算法的核心思想，在永磁同步电机 Id=0的双闭环电压矢量控制系统运行时缺少直接速度测量手段的情况下，用滑模观测器(SMO)和模型参考自适应观测器(MARS)对电机的即时转速、转子位置进行并行估测，计算出两组不同的 SVPWM电压输入uα、uβ值，再赋予权值进行交互输出电压值。通过分析和仿真结果表明，所提出的永磁电机无速度传感器矢量控制系统的转速辨识方法具有较强的鲁棒性和令人满意的动静态性能。%A new motor speed and rotor position observer based on the IMM algorithm is proposed,which is used for i-dentifying parameter that the speed of vector control system of permanent magnet synchronous motor with speed sensorless. In order to undermine the jitter of sliding mode observer,Improved dynamic properties of model reference adaptive observer. The observer is based on the core concept of interactive multiple model algorithm,under the condition of Id=0 vector con-trol system of double closed-loop voltage magnet synchronous motor runs with the lack of direct speed measurements,by use the synovial membrane observer and modelling reference adaptive observer to evaluate instant rotational speed and rotor posi-tion of vector control system in parallel,calculate the two different values of SVPWM voltage import uαand uβ,then assign the weight to interactively output voltage values.Though analyzing and simulating results show that the proposed speed sen-sorless vector control system of permanent magnet motor speed identification method have stronger robustness and satisfac-tory dynamic and static performance.