Speed Control of IPMSM Based on Series Connection Leading Correction Linear Active Disturbance Rejection Controller

In the interior permanent magnet synchronous motor drive system, the conventional linear active disturbance rejection controller (LADRC) has coupling problems with tracking and antidisturbance under different operating conditions and various complex disturbance conditions due to the influence of bandwidth. To solve abovementioned problem, a series connection leading correction LADRC (SCLC-LADRC) is proposed in this article. As the core of SCLC-LADRC, the SCLC linear extended state observer (SCLC-LESO) is composed of the total disturbance transfer function of the conventional linear extended state observer and a series connection leading correction network. As a result, the estimation range of the LESO for total disturbance is expanded, and the problem of system oscillation caused by excessive observer bandwidth is also solved. Finally, the validity and availability of the proposed method are proved through theoretical analysis and experiments.