Study on a Phase-Shifted Full-Bridge Converter with Constant-Current Output

• Main Authors: Han-Yi Cheng, 鄭漢義
• Other Authors: Jing-Yuan Lin
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/q34399

碩士 === 國立臺灣科技大學 === 電子工程系 === 105 === The objective of this thesis is to design and implement the full-bridge phase-shift converter for high current output. The control strategy is designed to be capable of constant voltage (CV) mode and constant current (CC) mode. Finally, IC UCC28950 as pulse-shift modulation controller, using phase shift modulation signal to control duty cycle, the zero-voltage switching (ZVS) features can effectively reduce the switching losses and raise conversion efficiency. Finally, in order to consider the high current load, to solve the difficulty of selecting suitable components and the heat dissipation problems, a design example of 600 W power converter with 24 V input voltage and 0-10 V output voltage and full load current 60 A is implemented and tested. Using a single group in parallel into multiple groups, to achieve the maximum output current of 300 A, the maximum power of 3 kW converter. Experimental results show that the maximum efficiency is 82.4%.