Sliding Mode Speed Control Strategy of Permanent Magnet Synchronous Motor with Disturbance Compensation

Due to the high efficiency of permanent magnet synchronous motor, small loss, and good control performance, it is widely used in various industries. However, it was found in the reading literature that the control performance of the permanent magnet synchronous motor speed regulating system is easily affected by factors such as load changes and internal parameter passage, which causes the permanent magnet synchronous motor to be affected to some extent during the operation. In response to the problem of the non -high accuracy of the PI current control system of permanent magnet synchronous motor, it proposes to use the rhythm design sliding mode speed controller instead of the PI controller in the vector control. However, due to the existence of a certain shaking of the sliding mold control, this article observes and compensate the load torque by designing the method of disturbing the observer, thereby suppressing the shaking of the sliding mode speed controller, and finally reaching the anti - disturbance performance of the control system and the improvement of the control system The effect of robustness. Through the simulation test of Matlab/Simulink, the sliding mode speed controller and disturbance observed observed were better verified under the influence of the system.