| dc.description.abstract | The power electronic converter is an interface between alternating current (AC)and direct current (DC). Generally, it can be classified into three categories: AC/DC converter, DC/DC converter, and DC/AC converter. Since the power is transmitted with AC fashion, most home-electronic products should translate it to DC by two-stage solution, which consists of AC/DC converter and buck converter. In this
thesis, a single-stage solution, which integrates power factor correction (PFC) circuit and buck converter, is proposed to save cost and improve power efficiency in
comparison with two-stage solution. The feature of our proposed circuit can make the total power consumption identical while the input AC voltage is changed.
As a result,the power consumption of home-electronic products can be reduced whether the instantaneous power increases. In addition, the behavior of proposed circuit is presented with mathematical analysis, and its function is verified by the system simulation software, Matlab/Simulink and Saber simulator. Consequently, based on our proposed circuit, the harmonic distortion of power-factor buck converter is greatly
reduced, and zero phase different between input current and voltage is achieved. Furthermore, the power factor is almost approximated to 1, and the regulation of output voltage is also maintained. | en_US |