| With the development of power electronics, motor control also got an unprecedented development, to the original DC motor control as the main targets of the era have been replaced by. Then AC motor instead of DC motor, AC motor has many advantages compared with DC motor: low cost, strong overload capacity, simple operation, easy to control, and so on. But AC motor has an obvious shortcoming that is not easy to governor speed. The researcher has taken a long period to solve this problem. Finally they found a good solution, which is Frequency Control. Then converter has become a more central part in AC motor control, because it will have a direct relation with the control system performance. So what kind of control program design converter becomes asynchronous motor speed designs very important issue. So how to choose the control scheme of converter has became a very important problem in the design of speed governing system.In the 1970s, the successful development of electronic transistors laid the foundation for the development and popularization of the VVVF technology. With the realization of variable frequency technology, the realization of vector control technology, and modern control theory of continuous improvement, the governor makes asynchronous motor performance of an unprecedented improvement. In addition, the rapid progress of computer technology and large-scale integrated circuits greatly simplifies the implementation of SPWM and vector control methods, and also strengthens and expands the functions of the converter so that the VVVF technology has been rapid development. And some more advanced control algorithm is also in the unceasing development and optimization. Now fuzzy control theory has been applied on many occasions, and be paid more and more attention by developers. Fuzzy adaptive PID algorithm is a relatively comprehensive algorithm. Fuzzy adaptive PID has many advantages, such as better dynamic performance, shorter accommodation time and no overshoot in the control system. Currently, few converters adopt fuzzy adaptive PID algorithm, but from the vantage point, fuzzy adaptive PID algorithm must be applied to more and more control of the converter.In this paper, based on existing mining equipment to the whole mine hoist system for an in-depth study and improvement. Focus on the design of the inverter, through the use of fuzzy adaptive PID algorithm to control the frequency converter, and were used fuzzy adaptive PID algorithm and the general PID algorithm for the simulation inverter system, results show that using adaptive fuzzy PID control algorithms have obvious advantages. Benefits are as follows:(1) Adaptive fuzzy parameters PID control than conventional PID control has a good dynamic performance, such as rise time, shorter than the regulation time, but no overshoot;(2) In the course of simulation, when the parameters have changed, the fuzzy parameters adaptive PID control than conventional PID control can significantly improve the control system of dynamic performance;(3) In this paper, the use of the fuzzy parameters adaptive PID control method effective, easy to implement, easy application, compared with the conventional PID control, not only on the parameters charged with a strong ability to adapt to change, but also in larger object model structure also changed circumstances To obtain better control.Therefore, if the fuzzy adaptive PID control can be used in actual control ,it will be very effective for improving the performance of the converter.Another paper also highlights the mine hoist system of improvements, including the failure to protect the gun design, further human touch screen design and have obtained very good results. |
PDF Full Text Request