A Practical Design On The Controller Of Controlled Reactor

Magnetically controlled saturated reactor is a newly reactive power compensation device. It has an approximate linear A-V characteristic,less harmonics and relative less response time. It is the first device in the area of voltage regulation and reactive power compensation. The theory and function of Magnetic valve controllable reactor is illustrated in detail in the paper, the mathematical model is given, and its electromagnetism equations are presented. In the basis, a control circuit is designed by LPC2138 chip from Philips Company, and the controlling of this device is programmed by computer software to have user-friendly interface.Firstly, this paper looks back on the development of Magnetic valve controllable reactor,reviews its situation today, points out its superiority compared with other reactive power compensation device, discusses the advantage and shortage of its control circuit nowadays, and puts forward to design a safe and stability control circuit with LPC2138.Secondly, this paper establishes the electromagnetism equations in all working states by analyzing the magnetic flux, and presents the relationship between the control voltage of thyristors and the line voltage. The equations between the control and output current are given.Finally, the paper introduces the software and hardware realization of the device, and recounts the measurements and ways adopted in detail. The hardware is compact, reliable and steady. A test is practiced under the assistant of computer to prove the whole design, and the results indicate that this device designed in this paper has realized the initial demands.