PLC的中频炉温度控制系统设计

摘要控制技术是传统的加热炉电气控制系统主要运用的控制技术。继电器控制系统采用了固定接线的硬件来实现逻辑控制，因此使得控制系统的体积增大，耗电多，效率低且容易产生故障，从而无法维持工业正常生产的结果。然而在当今社会随着PLC控制技术的发展，传统的继电器控制技术的缺陷越来越明显，因此这种用继电器控制系统来实现逻辑控制的方法将被基于计算机技术产生的PLC控制技术彻底取代。由于PLC本身所具有的优异性能使得基于PLC控制技术的温度控制系统成本大幅下降并且这种系统更加高效稳定同时日常的系统维护也更为方便。这一种基于PLC的温度控制系统对改造传统的由继电器控制系统具有普遍意义。49294

中频炉是一种将工频50HZ的交流电转变为中频的电源装置。导线缠绕炉身形成一种类似感应线圈的状态，为使感应圈中产生高密度的磁力线，首先经整流后将，再把其整流后的，最后供给由电里流过的中频交变电流。当炉内有金属材料的时候，金属材料会切割产生的，因此在中产生很大的以达到加热效果。

论文网关键字：PLC 中频炉感应线圈

Intermediate Frequency Furnace Temperature Control System Based on PLC

Abstract

Relay control technology is the traditional heating furnace electrical control system, the main use of control technology. Relay control system adopts the fixed wiring of hardware to realize logic control, so that control the size of the system increases, power consumption, low efficiency and easy to result in failure to maintain the normal production of industrial results. However, in today's society with the development of PLC control technology, the traditional relay control technology the defects become more and more obvious. Therefore, the relay control system to realize logic control method will be based on computer technology, PLC control technology is completely replaced. Due to the excellent performance of PLC itself, the cost of temperature control system based on PLC control technology is greatly reduced, and the system is more efficient and stable, and the daily system maintenance is more convenient. This kind of temperature control system based on PLC is of universal significance to the transformation of the traditional relay control system.

Intermediate frequency furnace is a power supply device which transforms the alternating current of power frequency 50HZ into intermediate frequency. Wire winding shaft to form a similar induction coil, for the induction coil to produce a high density of magnetic field lines. First of all, the three-phase alternating current is rectified into DC, the DC adjustable intermediate frequency current and finally supplied by the capacitive and inductive coil over-current intermediate frequency alternating current. Due to the presence of high magnetic flux density in the induction coil, so in the induction coil field lines can containing metal materials cutting, thus in metal materials produce large eddy currents to achieve the heating effect.

Key words: PLC Intermediate frequency induction Coil

图清单 I

表清单 I

摘要 III

ABSTRACT IV

1 绪论 1

1.1中频炉加热的基本原理 1

1.2 中频炉的发展史 1

1.2.1国外中频炉发展 2

1.2.2国内中频炉发展 3

2 PLC的中频炉温度控制系统设计:http://www.youerw.com/zidonghua/lunwen_52252.html