Study and Implementation of DC-DC Converter for Wide Output Voltage Variation

• Main Authors: Jhih-Wei Lian, 連志偉
• Other Authors: Huang-Jen Chiu
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/68857849719669666428

碩士 === 國立臺灣科技大學 === 電子工程系 === 104 === This thesis focuses on the study and implementation of a wide output voltage DC-DC converter. The front architecture is three level series resonant converter. This converter extends from half-bridge series resonant converter and have zero-voltage switching (ZVS) property so that the power switch loss can be reduce. The primary side of converter have used four power MOSFET and to adjust output voltage by power MOSFET different switching, so the second stage converter transform ratio can be decreased. The second stage is buck converter using voltage control mode and changing error amplifier reference voltage to reach wide output voltage object. The operation and mathematical analysis for the series resonant and buck converter are discussed. For the resonant tank is described in the detail with Simplis and Mathcad. Finally, the experimental results from the implemented prototype converter with an dc input voltage of 400 V, a dc output voltage maximum 600V and the rated maximum output load of 4 A are measured. For 20-%, 50-%, 75-% and 100-% load efficiency is up to 93%. By creating a loss analysis and proposed future research directions.