A Single-phase Full-bridge Boost-buck AC/DC Converter with Adjustable Power Factor

• Main Authors: Yi-Fan Ciou, 邱逸凡
• Other Authors: Guo-Jhen Ciou
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/38752q

碩士 === 國立虎尾科技大學 === 電機工程研究所 === 97 === This thesis presents a novel single-phase full-bridge AC/DC converter is constituted by combining a single-phase full-bridge power circuit with and a DC SEPIC converter. Basically, it has several advantages such as boost/buck voltage, sinusoidal input current, adjustable power factor and low switching losses etc. A generalized zero vector(GZV) technique is applied to the proposed converter, such that the power circuit is integrated into a single stage. Digital control of the converter is implemented by VisSim software and TI DSP TMX320F2833 chip. Some advantages, such as small size, easy revision for parameters, and development with less cost, are achieved. Furthermore, use of the dead-band control strategy reduces effectively the switching loss of power switches. Besides, transfer function for both middle-capacitor voltage to duty cycle and output voltage to duty cycle is derived. On the other hand, circuit response of the converter is simulated using MATLAB. Moreover, some experimental results are also presented for verification.