【作者】 谢小高；

【导师】 钱照明；

【作者基本信息】 浙江大学 ， 电气工程， 2005， 博士

【摘要】 电力电子系统集成技术作为电力电子技术发展的重要趋势在最近几年受到了广泛的关注。论文首先回顾了电力电子技术的发展现状,对电力电子系统集成中关于小功率DC/DC标准模块系统集成的拓扑优选的问题进行了研究和探讨。这些研究主要包括非隔离型DC/DC标准模块拓扑筛选、隔离型小功率DC/DC标准拓扑筛选、多路输出拓扑的筛选、同步整流拓扑的研究等四大类。 非隔离DC/DC小功率变流器中的关键问题主要瞬态响应和效率。针对这两个问题本文找出了用于改善瞬态响应的优选拓扑;提出了串联等效电压源法和变电感法两种概念,并衍生出一系列新的拓扑族来用作标准化模块的侯选拓扑。通过对多模块并联均流稳定性的研究,提出了一个统一的小信号模型,分析了均流环对单模块输出阻抗以及系统稳定性的影响。 在隔离型小功率DC/DC变流器方面,通过对隔离型的拓扑进行全面的分类、综述和比较,本文提出了一些新的拓扑,并初步筛选了六种隔离型小功率电力电子DC/DC标准模块候选拓扑。 全面归纳和计算出了多种多路输出拓扑的数学模型,使负载调整率可以量化。在分析和比较多路输出拓扑的基础上,提出了两种新型的后级调整拓扑,并初步筛选了三种拓扑作为多路输出电力电子标准模块拓扑的候选拓扑。 本文还对同步整流拓扑进行了全面的分类、综述和比较。在研究基础上,提出了如何构造电压型理想同步整流拓扑的方法并构造出六种理想拓扑用于不对称结构拓扑,提出了两种新型的对称结构电压型同步整流驱动方案和一种新型电流型同步整流驱动方案。最后针对有可能作为标准拓扑的三类拓扑结构,分别比较了适用的同步整流拓扑,并找出了其中最优选的同步整流拓扑。更多还原

【Abstract】 As an important development trend in power electronics, Power Electronics System Integration (PESI) has received more and more attention in the recent years. In this dissertation, the state of the art of power electronics is reviewed firstly, and then topology selection and optimization for low power level standardized DC/DC modules in PESI have been researched and discussed. This dissertation mainly focuses on four classes topologies selection including selection of non-isolated low power level standardized DC/DC topologies, selection of isolated low power level standardized DC/DC topologies, selection of multi-outputs low power level standardized DC/DC topologies as well as selection of synchronous rectification topologies in low power level D/DC modules.The key issues in non-isolated low power level DC/DC converters are transient response and efficiency. In this dissertation, some optimized topologies are proposed to improve the transient response, and the concepts of sired-equivalent-voltage-source method and varied inductor method are proposed to extent the duty cycle of buck converter and to improve the efficiency as well. Several topologies based on these two concepts have been compared and the relatively optimally-selected topologies are found. The research on the paralleled multi-module system has also been processed and a unified small signal model for different types of control methods has been proposed. The effects of current-sharing loop on single module output resistance and system stability has been analyzed.As well as the low power level isolated DC/DC converters are concerns, the relevant topologies have been thoroughly classified, synthesized and compared, and some new topologies have been proposed. Six isolated topologies are optimally-selected as the candidate topologies for the standardized DC/DC modules.Detailed review, classification and comparison of topologies for multi-output applications have also been presented, and some new topologies have been proposed. Several topologies are optimally-selected as the candidate topologies for the standardized multi-output DC/DC modules.Synchronous rectifier driving topologies for low power lever DC/DC converters have also been studied in this dissertation. A method to build ideal voltage-type synchronous has been presented and six ideal synchronous rectifier topologies are proposed as examples. Some improved symmetrical structure voltage-type and current-type synchronous driving topologies has been developed. Finally, different synchronous rectifier driving topologies suitable for three different types candidate standardized topologies, including asymmetrical structure, symmetrical structure and current-type, have been compared. And the most optimally-selected topologies have been achieved.更多还原