Speed Control Strategy of PMSM Based on Improved Auto Disturbance Rejection Control

In order to improve the speed control system of permanent magnet synchronous motor (PMSM) for new energy vehicles, a speed controller based on auto disturbance rejection control (ADRC) technology is designed. In ADRC, a nonlinear function based on fixed time convergence is introduced into the extended state observer to solve the global non-finite time convergence problem of the nonlinear function in the extended state observer. The simulation results show that the improved extended state observer has better disturbance estimation ability, and improves the response speed and anti disturbance ability of the speed control system.