Current sensorless control for modified half-bridge PFC converter

• Main Authors: Chen, Wei-Cheng, 陳威成
• Other Authors: Chen, Hung-Chi
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/60099960610576659240

碩士 === 國立交通大學 === 電機學院電機與控制學程 === 102 === This thesis presents the improvement of half-bridge power factor corrector (PFC) converter. For the main power circuit, use modified half-bridge PFC converter to replace the traditional topology. The modified structure can improve the short through problem which caused by series switching components to enhance the circuit reliability. And also, it can reduce the switching power loss which caused by the body diodes’ reverse current recovery time. Especially, the double voltage output characteristic of half bridge structure will be useful for higher voltage application. In order to simply the modified half bridge PFC control structure, the current sensorless control model would be estimated on the feasibility. First, check and compare the electrical characteristic difference of simulated result between multi-feedback control model and current sensorless control model. To estimate the electrical characteristic of current sensorless control model is good enough to be used. Finally, implement and evaluate the sample with modified half bridge PFC structure and sensorless control model.