模糊控制理论在电动机恒流软启动中的应用

摘要

According to the analysis of the starting characteristic of induction motor and the comparison on PID control and fuzzy control, this paper presents a design method of induction motor soft starting based on fuzzy control. Through measuring input current, and processing fuzzy inference, the fuzzy controller can change the control angle of thyristor, keep the starting current constant and increase the terminal voltage, therefore get better control results. In terms of induction reality, this paper introduces the fuzzy control theory, the foundation of control model, the selection of control configuration and the realization of control decision.%根据对电动机启动特性的分析及与常规PID控制和模糊控制理论的比较，提出了基于模糊控制的电动机软启动设计方法，通过检测输入电流，进行模糊判决，进而不断改变晶闸管控制角，使启动电流保持恒定，端电压渐增，达到良好的启动效果.结合电动机实际，介绍了模糊控制原理，控制模型的建立，控制结构参数的选择及控制决策的实现.