Control method of permanent magnet brushless dc motor speed control system based on time-varying disturbance suppression

Abstract

A method for control a speed regulation system of a permanent magnet brushless DC motor based on time-varying interference suppression comprise that following three steps: firstly, obtaining a second-order model of the system on the basi of a state equation of the permanent magnet brushless DC motor system; Secondly, a disturbance observer is designed to estimate the time-varying disturbance by using the velocity signal in the model. Finally, the final time-varying disturbance suppression controller is designed based on the disturbance estimation. Compared with the traditional cascade structure control method, this method is not only simple in controller design, but also easy to adjust parameters, and has strong interference suppression ability, which can meet the application requirementsof permanent magnet brushless DC motor speed control system in the field of high performance.

Description

technical field [0001] The invention belongs to a control method of a speed regulation system of a permanent magnet brushless direct current motor, in particular to a control method of a permanent magnet brushless direct current motor speed regulation system based on time-varying interference suppression. Background technique [0002] The permanent magnet brushless DC motor is a new mechatronic motor that has emerged with the development of semiconductor electronics technology. It is the product of the combination of modern electronic technology (including power electronics, microelectronics technology), control theory and motor technology. It is not limited to AC. The DC field also involves the fields of electric and power generation energy conversion and signal sensing, because of its simple structure, high operating efficiency, no excitation loss, good speed regulation performance, light weight, small inertia, precise control, reliable operation and maintenance With a ser...

AI Technical Summary

Problems solved by technology

However, the characteristic of the traditional PI control algorithm is to use the proportion of the error to reduce the error, and use the integral to eliminate the steady-state error. Therefore, while shortening the tracking time, it will bring about the problem of increased overshoot, that is, it cannot solve the problem of rapidity and stability. sexual conflict

At the same time, the same parameter in the PI controller cannot be applied to different speeds. When the speed changes, the PI parameters should also be changed accordingly.

Although active disturbance rejection control can estimate disturbances and suppress system disturbances in real time, it can only deal with slow-varying disturbances, and also cannot deal with high-order forms of disturbances

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