【作者】 赵新栋；

【导师】 漆汉宏；

【作者基本信息】 燕山大学 ， 电力电子与电力传动， 2007， 硕士

【摘要】 本文首先回顾了VRM的发展历程、研究现状和面临的挑战，并结合设计的关键性问题以及目前应用于VRM的交错并联技术，研究了一种新型适合未来VRM发展要求的拓扑结构。本文系统分析了48V输入VRM设计的关键问题，针对CPU对VRM的高压输入、低压大电流输出，快速动态响应，高效率等需求，讨论了输入滤波器、同步整流技术、VRM控制技术及其补偿回路的设计。本文全面论述了低电压输入的VRM非隔离性同步整流准方波Buck变换器拓扑特性、稳态和动态性能，参数设计等。在此基础上对多通道交错并联技术的原理和交错并联拓扑性能及磁集成技术进行深入分析。研究结果表明：采用磁集成技术的交错并联SR-QSW-Buck拓扑结构具有效率高、体积小、瞬态响应速度快的特点，可以满足VRM的严格性能指标要求。本文对提出的适合48V输入的VRM两级式变换器进行了重点研究，并进行了改进，说明该变换器具有控制简单、高效率、高功率密度的优点，并能改善动态响应，减小热应力。最后对这种电路拓扑结构进行了仿真和试验验证，证明了理论分析的正确性。更多还原

【Abstract】 Firstly this paper reviewed the development course of the VRM, status and the facing challenges. The combination of design, as well as the current key issues of the VRM and interleaving parallel technology. A new topology for the future VRM is studied.This paper systematically discussed the key design of 48V input VRM. In view of CUP to VRM’s demanding of high-voltage input and low-voltage high-current output, dynamic response, high efficiency and so on., this paper discussed the input filter, synchronous rectifier technology, VRM control technology and its compensation circuit designing.The non-insulated topology characteristics, steady and dynamic principles, parameter design of VRM applied for low-input voltage situation are mainly analyzed. The theory and capability of multi-channel interleaving topology and the magnetic integrated technique are investigated thoroughly. The result of study shows the SR-QSW-Buck converter structure adopted interleaving and magnetic integrated techniques achieves high efficiency, low volume, fast transient response, and satisfies severe performance requirements of VRM.This article has putted the key research on proposed suit to 48V input VRM two-stage converter, and has made the improvement. It explained this converter have some merits of the control to be simple, the high efficiency and the power density. As well as it can improve the dynamic response and reduce the thermal load. Finally the paper has carried on the simulation and the experimental confirmation to this kind of electric circuit topology. Thus the paper has proven the theoretical accuracy.更多还原