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本文介绍了转速-电流双闭环直流调速系统,分析了调速系统的基本性能指标,然后系统的论述了现代PLC控制技术,说明了PLC控制系统的基本设计方法,采用可靠性高的大功率晶闸管为调速系统可控整流电源,依据现代控制理论,对直流调速系统的电机、PLC逻辑控制、调速系统的主电源、控制电源进行说明,并对PLC在调速速系统中应用时的主要问题-电磁干扰做了进一步阐释。
This paper introduces the speed - current double closed-loop DC speed control system, analysis of the basic performance of speed control system, and then discusses the system of modern PLC control technology, PLC control system described the basic design method, the use of high-power high reliability According to the modern control theory, the thyristor is used as the controllable rectifier power supply for the speed regulation system. Based on the modern control theory, the main power supply and control power supply of the DC speed control system motor, PLC logic control and speed regulation system are described. The main problem - electromagnetic interference has been further explained.