Design of Motor Control System Based on PLC and Converter

With the rapid development of variable frequency speed regulation technology and programmable controller,they have become one of the main devices of the contemporary industrial automation and are widely used in the field of industrial production. This paper designes a motor control system based on the programmable logic controller and frequency converter. It regulates the speed of motor by variable frequency. The experimental results show that the accuracy of closed-loop system is better. Closed-loop control should be adopted to meet the higher precision requirement.