Based On Three-phase Bridge Controlled Rectifier Circuit Design

Following the application of electronic technology in the industry and agriculture, transportation, special technology, national defence, medical treatment, environment and daily life of people field. In the 21 century, there are appeared more and more the products of electronic technology applied. So it is important to research and practice the electronic technology in electric power field.The author is mainly to discuss the master and trigger circuit of three-phase bridge controlled rectifier (TBCR) circuit, and controlled circuit diagram. Its destination is to transpose from 380V into 500V, 650V, or 800V, and then SCR rectify the output of direct current for our system's load. Because our system required high-power, high-direct current, high voltage, the system of control would be complexed. Especially, trigger circuit must be one by one. If it was not, the change of output's power would make our system be short circuit which will damnify our system.In our circuit designation, C8051-F020 microprocessor control the whole system, communicates with customers, and send orderly signal to the each pin of 6 SCR. Our system's part work is to fetch the voltage of trigger current which will feed back to the analog pin of C8051-F020. And according to the number of voltage and required the size of load output, C8051 will change conduction angle.During designing our system, the author program the processor of our system by using KELL-C software, scheme out circuit diagram by using PROTEL-99. So far, the author has realized the whole system, and has got a good product.