An Asymmetrical Half-Bridge Converter using Synchronous Rectifier combined with Soft-Switched Bridgeless Continuous-Conduction-Mode Power Factor Corrector

• Main Authors: Ming-Jyun Li, 李明峻
• Other Authors: Chin-Yuan Hsu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/38781994110893379677

碩士 === 國立高雄應用科技大學 === 電機工程系 === 99 === This thesis focuses on the analysis and design of asymmetrical half-bridge converter using Synchronous Rectifier with Soft-Switched Bridgeless Power Factor Corrector circuit. First, the characteristics of the Soft-Switched Bridgeless Power Factor correction will be analyzed in this thesis. Then, a clear analysis and design criteria is provided for the asymmetrical half-bridge converter using Synchronous Rectifier in order to make the circuit design easier. The asymmetrical half-bridge converter using Synchronous Rectifier has the merits of simple structure, fewer component, lower switch stresses and using the parasitic components to achieve zero-voltage-switching. Finally, the converter is verified using IsSpice software and a prototype 150W AC-DC power converter is implemented. The efficiency of the front stage Soft-Switched Bridgeless Power Factor correction circuit can reach 96.2%, the maximum efficiency of the rear stage asymmetrical half-bridge converter using Synchronous Rectifier is 93.1% and the maximum whole system efficiency is above 89%,and is higher than the current industry specification of 85%.