Analysis and Synthesis of a Soft-Switching BCM High Power Factor Boost AC/DC Rectifier

• Main Authors: Wei-Hsuan Chu, 瞿偉軒
• Other Authors: Sung-Pei Yang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/03153496634861193127

碩士 === 崑山科技大學 === 電機工程研究所 === 101 === In order to decrease the switching loss of main switch and maintain high conversion efficiency, a zero-voltage transition (ZVT) soft-switching technique is applied to the conventional boost rectifier. Therefore, the proposed ZVT boost rectifier, controlled by peak current mode control method, is operated in boundary conduction mode (BCM) and regarded as power factor correction (PFC) circuit in this thesis. It would comply with the international current standards IEC 61000-3-2 Class D on power factor and input current distortions of power supplies. Moreover, its output voltage can be well regulated against the input voltage and load variations. A PFC control IC L6561 is applied to implement the proposed ZVT boost rectifier to exhibit the performances of high power factor and output voltage regulation. Moreover, when the main switch of the proposed ZVT HPFC boost rectifier can be achieved ZVS condition under turn-on transition, the driving signals of the main switch and auxiliary switch must be well designed based on the PWM driving signal offered by IC L6561. Additionally, the operating principle, components design and small-signal model derivation of the proposed rectifier are also presented herein. Therefore, a controller can be well designed for the ZVT HPF boost rectifier with IC L6561 to have the performance of output voltage regulation in the presence of input line peak voltage and output load variations. Finally, the BCM HPF boost rectifier and soft-switching BCM HPF boost rectifier are built based on IC L6561 with the specifications of universal input voltage , output voltage , rated power 300 W. It reveals from experimental results that both of the two implemented rectifiers herein exhibit the performances of high power factor and output voltage regulation despite the variations of the peak line voltage and load resistances. Furthermore, according to the measurements of power efficiency, it shows that the ZVT HPF boost converter has the highest efficiency of 97.1 %, which is more than that the highest efficiency of 95.4 % for the BCM HPF boost rectifier.