Research On System Of Intelligent Anticorrosive Power

The dissertation stems from the item "the intelligent blade and defended system" importantly supported by the Fund of Hubei Physical Science.With the development of micro-electronics, computer technology, digital signal processing, communication, and improvement of system dependability and fault-tole rant technique, it is more and more necessary to empolder the new corrosion control system, which has better security, dependability and can supply power continuously, need few maintenance or no maintenance.The component parts and control principle of intelligent anticorrosive power are mainly introduced in the paper. The main circuit, pulse width modulation circuit, drive circuit, safeguard circuit ale respectively analyzed. Hard ware and soft ware are both expatiated systematically. At the same time, the key Points in designing high-frequency transformer, as well as the characteristics of MOSFET are discussed.The intelligent anticorrosive power is made up of main circuit are control circuit. The main circuit is made up of rectifier, filter, high-frequency transformer, output reactor, and half-bridge inverter, where MOSFET are adopted. In order to obtain accurate and real-time control, high Performance 16-bit microprocessor 80C196KC is adopted for control kernel. In the power source, a PWM technology and the current feedback PI algorithm is used to adjust the output volt-ampere character of power source. The digital signal from microprocessor are firstly converted into analogy signal, which is then modulated by pulse width modulate chip SG3525 into two Pulses not overlapped each other. At last the pulses are used to spring MOSFET after they are magnified. So the character of the anticorrosive power is magnified. RS-485 bus is adopted in the anticorrosive power supply system accomplishing the chain communications of between Power supply and PC.Reliability and noise resistance designs are also covered. In order to reduce their bad infections, some hardware and software measures are adopted. The experiment results indicates: The control system has many advantages such as simple circuit, high control Precision, strong anti-interference ability, intelligible man-machine dialogue and reliable performance. It can meet the request of power source, and improve the automation degree of power source.