随着变频调速技术和可编程控制器的飞速发展,它们已经成为当代工业自动化的主要装置之一,在工业生产领域得到广泛使用。设计一种基于可编程逻辑控制器和变频器的电机控制系统,对电动机进行变频调速,实验结果表明,闭环系统精度较好,在对精度有较高要求情况下应采用闭环控制。 With the rapid development of inverter technology and programmable logic controller (PLC), they have become one of the major devices in contemporary industrial automation and are widely used in industrial production. A motor control system based on programmable logic controller and frequency converter is designed, and the frequency control of the motor is carried out. The experimental results show that the accuracy of the closed-loop system is good, and the closed-loop control should be adopted when the precision is high.