A Novel Single-Switch Series-Loaded Resonant Converter with Zero-Current-Switching Scheme

• Main Authors: Jian-Cheng Liao, 廖建程
• Other Authors: Yung-Shan Wang
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/45549501618012652873

碩士 === 崑山科技大學 === 電機工程研究所 === 100 === Up to now the class-E resonant converter of all kinds is the most efficient converter. The converter shows with low electromagnetic interference, low switching losses, smaller size, high efficiency and low cost advantages. In the high frequency mode, the resonant converter caused by the different resonance effects due to the different permutations and combinations of the resonance of the resonant tank inductor and resonant power. The resonant converter when the power transistor does the switch could achieve the zero voltage switching or the zero current switching, so that is able to reduce the loss at the power switch. To enhance the efficiency of the conversion rate and reduce unnecessary waste of energy the time of the switch. This thesis presents a new single-switch series load resonant converter. Using the power switch at zero current operating effectively reduces the switching losses, and promotes the efficiency of the converter. Besides only using the single switch runs high-frequency switching, Compared with traditional class-D converter would obtain the higher conversion efficiency, and the combination of the resonant tank consisting of inductors and capacitors produces the desired voltage and current. At the same time by adjusting the switching frequency of the power switch achieves the flexible switching characteristics, and controls the output voltage and current. Distal of this thesis would implement a series of load converter switch of new single-component parameters, specifications and simulation results, and then are compared with each others to verify the proposed new single-switch zero-current switching series load resonant converter. Finally, the experimental results show that this new single-switch zero-current switching series load resonant converter, the overall circuit efficiency by up to 96%. The result shows quite good, and also achieve the desired goals or more.