Research On Permanent Magnet Synchronous Motor Speed Control Based On Fuzzy Fractional PID

In recent decades,with the deeper and deeper interaction between various disciplines,no discipline exists independently.Vector control and intelligent algorithms are mostly integrated with permanent magnet synchronous motor technology.Different intelligent algorithms and vector control are combined to form many new motor drive technologies.The continuous development of industrial technology has put forward new requirements for the precise speed control of permanent magnet synchronous motors in the numerical control field.The previous control strategies that satisfies the system performance is in urgent need of improvement.Traditional PID control,vector control and other methods have been difficult to meet the precise control of the speed of permanent magnet synchronous motors under complex conditions.This subject proposes a new control method in the field of permanent magnet synchronous motor speed control.Experiments show that this method can improve the speed regulation accuracy of permanent magnet synchronous motors,shorten the response time of speed regulation,and meet the requirements of different speeds and different loads.The smooth control of the motor speed is extremely important for flexible control of the speed of the permanent magnet synchronous motor and for the normal and stable operation of the system.This paper introduces the research background and significance of the subject,and analyzes the necessity of improving the control method of permanent magnet synchronous motor.By analyzing the research focus and trend of permanent magnet synchronous motors,the advantages and disadvantages of the current speed control methods of permanent magnet synchronous motors are compared and summarized.Considering these advantages and disadvantages,the research direction of this subject is proposed.The permanent magnet synchronous motor is a typical nonlinear system,featuring numerous parameters,diverse working environment and strong coupling.Aiming at this characteristic,this paper introduces the theory of fractional calculus to the traditional PID controller,adding the two adjustable parameters of integral order λ and differential order μ to achieve fine and flexibly control over the permanent magnet synchronous motor,which greatly improves its flexibility and optimizes the control effect.In order to accurately and quickly determine the various parameters of the fractional-order PID controller,this subject designs a fuzzy fractional-order PID controller.Finally,simulation experiments are carried out on the three controllers.The experimental results show that the fuzzy fractional-order PID controller makes up for the shortcomings of the other two that cannot be adjusted online,improves the stability of the permanent magnet synchronous motor operation,and reduces the overshoot.In the case of increased disturbance,the response speed is improved,and the influence of different disturbances is reduced.In general,the fuzzy fractional PID controller designed in this paper has a better control effect in the speed control of permanent magnet synchronous motors.