Application And Realization Of Buck-Boost Circuit Applied In AC System Based On ARM

The present thesis mainly deals with the digital control of the embedded processor(ARM) applied to the Buck-Boost circuit to regulate alternating current(AC). It also covers the following aspects such as the structure of the AC regulating system, the controlling method and strategy, the design philosophy and research work of the controlling software and hardware, and their theoretical tests.Firstly, the author has analyzed the application of the Buck-Boost circuit to the direct current(DC),upon which the theoretical analysis on the application of the Buck-Boost circuit to the alternating current(AC) is based. By introducing the function, the mathematical relationship of the input and output voltage is deduced, which serves as the theoretical base for the digital control.In regard to the hardware, the author has designed a control circuit with a new type of Buck-Boost circuit as the major circuit topology and with the ARM embedded processor made the Philips as the core, as well the hardware system for circuit examination. Concerning the calculation, the author has adopted the blur control without the mathematical modeling to realize the closed circuit control. With regard to the software, the assembly language and C language are both adopted in calculation and the control of the main circuit. The design of the controlling circuit and software is the kernel of the system as well as of the present thesis. Experiments have been done to prove the validity of the principles.The results have proved that it is feasible to apply the ARM embedded processor to the Buck-Boost circuit. In addition, it has presented benign performances both statically and dynamically. As digital control represents the new trend in the study of current, the present thesis and the relevant results provide a new angle to digital control.