Design of Robust Dual Boost Converter Power Factor Correction Circuits

• Main Authors: Zong-ru Zai, 蔡宗儒
• Other Authors: Tzuen-Lih Chern
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/77714214170830200229

碩士 === 國立中山大學 === 電機工程學系研究所 === 99 === The traditional AC/DC rectifier usually has the defects of low power factor and serious harmonic distortion and it results in serious pollution to the power system. This thesis proposes active power factor correction technique using a new AC/DC Dual Boost Converter. For power factor correction, inductor current is operated in the continuous conduction mode. First, the converter is analyzed by state space averaging method. Furthermore, we design applicable compensator by frequency analysis to implement a good power factor system. A classical PFC circuit with PI control law has low power factor under light load. In order to overcome problem, the thesis proposes a Dual Boost Converter circuit with robust performance. Comparing with circuits using PFC IC “UC3854”, the proposed system obtains higher power factor under the condition of the same light load.