Design and Realization of a 1-kW Digitally-Controlled Phase-Shifted Full Bridge Converter

• Main Authors: Po-Chin Lin, 林伯晉
• Other Authors: Hung-I Hsieh
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/62976208792852335963

碩士 === 國立嘉義大學 === 電機工程學系研究所 === 103 === The main focus of this study is to design and build a high power dc-dc phase-shifted full bridge zero-voltage-switching (ZVS) converter, incorporating the design and implementation of a DSP-based controller. By use of the phase-shifted PWM technique and the resonant tank network to achieve ZVS on switch elements, high efficiency can be obtained with zero-voltage switching during their turn-on transitions. The soft-switching and DSP-based controller ideas are quite feasible‚ and can be used to power circuits of many topologies and applications, leading to a converter of reduced size and weight, and of high efficiency and power density. It should be apparent that, practical feasibility of good system performance with high efficiency digital controllers in power converter applications has recently been explored, and the techniques are described. The advantage is the fact that this approach can provide much reduction of sensitivity to variations in passive elements, without losing the high-quality property.