Light Load Efficiency Improvement of Three Level Phase-Shift Controlled Converter

• Main Authors: YU, CHIH-CHUN, 余智淳
• Other Authors: LAI, YEN-SHIN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/ru5qx2

碩士 === 國立臺北科技大學 === 電機工程系 === 107 === The objective of this thesis is to improve the light load efficiency of three level phase-shift controlled converter. The basic idea is to increase the resonant inductance to achieve zero voltage switching even under light load. In the thesis, a three level phase-shift controlled converter has been designed and implemented using UCC3895. The specifications of this converter are as follow: input voltage 400 V/DC, output voltage 48 V/DC, output current 10 A, output power 480 W, and switching frequency 120 kHz. The experimental result show that the peak efficiency is 90.71% at maximum load when resonant inductance is 35 H, and the efficiency is 78.34% under 1A load condition. These results fully support and confirm the design and experimental work.