plc变频调速控制在风机中的应用.doc

学号： 常 州 大 学 毕业设计（论文） （2012届） 题 目 学 生 学 院 专业班级 校内指导教师 专业技术职务 校外指导老师 专业技术职务 二○ PLC变频调速控制在风机中的应用 论文首先介绍了风机的基本信息和现状，风机调速方案的种类，以及变频调速技术的发展现状及其优势，PLC的发展概况等。目前，许多。而对风机应用变频调速系统，则可使电机根据现场的压力情况，随时调节转速，使电机能够持续高效率运行，维持气压的稳定，并对危险状况及时做出报警。可以看出，变频调速的广泛应用无疑具有重要的意义。 PLC与变频器有机地结合起来，采用以气压压力为主控参数，实现对变频器频率的有效调节，从而控制风机的速度，使风机通风高效、安全。并且控制系统具有故障报警、及时中断等功能特点，为通风系统的节技术改造提供一条新途径。最后，通过组态软件的设计，对其进行一个简单的模拟，使得效果更为直观。 关键词：风机，PLC，变频器 PLC frequency control to control the fan Abstract：The paper first introduces the basic information and status of the fan, the type of fan speed control program, as well as the current development of frequency control technology and its advantages, the development overviewof PLC. At present, many ventilation system have some problems, and how to maintain the pressure constantly is very important.The fan variable frequency speed control system can enable the motor according to the pressure of the scene to adjust the speed at any time, also it can allow the motor sustained efficient operation,maintain the stability of the pressure,and alarm the dangerous conditions in time.It can be seen that extensive use of frequency control is having an important significance. The system combined with PLC and inverter, using air pressure as the main control parameters, can adjust the inverter frequency effectively to control the fan speed.Then it can make the fan ventilation efficient and safe.The control system also has a failure alarm and timely interrupt features.It provides a new way for the technological transformation of the ventilation system.Finally,by the design of configuration software design,conduct a simple simulation to make the