The Study On AC Motor Variable-frequency Speed Regulating System Based On DSP

From the tendency of the electric transmission all over the world, and with the continuous development of the electrical and electronical technology, electric drives act as extremely prominent function in modernization. In order to meet the requirements of high performance, environmental protection and energy conservation, AC variable frequency speeds regulating system makes the important role in the electric drives. Since the 1970s to 1980s, by deep study and consummation on AC speeds regulating technology, the AC variable frequency speeds regulating system with the special advange is replacing the conventional direct current speeds regulating system gradually, and the SVPWM technology has inestimable value in thus system.This paper introduced the general situation of AC variable frequency speeds regulating system, the domain which used, and the study situation. Aim at the reality of much energy consumed og our country, it is the tidal current for extending SVPWM technology in typical AC speeds regulating system.The paper primarily expatiated that the methods of AC speeds regulating, deduced the equivalent model, and showed the idea of vector control. Then study on the AC motors SVPWM variable frequency speeds regulating system based on DSP, and design the hardware, arithmetic methods of this system.In order to incarnate the practicability of this system, this paper showed the minimum system based on DSP, and realized the control strategies of variable frequency speed regulating using assembly and C language.This paper showed the experiment results and wave-line simulation. According to the test, the variable frequency speed regulating system not only can regulate speed smoothly in large range, but also have good dynamic performance. The test results confirmed that the design of variable frequency speed regulating system is effectual and feasible,and it is based for more exploiture and using of new experimental installation.