Angular Speed Control of Permanent Magnet Synchronous Motor Based on Improved Fractional Order ADRC

In order to improve the response speed and anti-interference ability of permanent magnet synchronous motor, a permanent magnet synchronous motor (PMSM) control method based on fractional ADRC is proposed in this paper. Firstly, the fractional order tracking differentiator (POTD) and fractional order extended state observer (POESO) are designed by using the concept of fractional calculus. According to the response speed of POTD and the observation effect of POESO, a new fastest function and a new nonlinear function are designed respectively. Then, a fractional order auto disturbance rejection (POADRC) controller is built based on the new POTD, the new POESO and the nonlinear feedback control law, and the stability is proved. Finally, the superiority and effectiveness of the proposed strategy are verified by simulation and experiment.