Measurement Noise Suppression Strategy for IPMSM Speed Control with Cascaded LESO

To solve the limitation of the noise suppression ability of the Linear Active Disturbance Rejection Controller (LADRC) speed controller of Interior Permanent Magnet Synchronous motor (IPMSM), the filtering characteristics of the Linear Extended State Observer (LESO) are introduced with the help of MATLAB/Simulink, the structure and principle of the cascaded LESO are studied. The performance and stability of cascaded LESO are discussed, and the bandwidth parameter adjustment method of the cascaded LESO is given. The cascaded LESO strategy is verified to have good noise suppression ability.