【作者】 梁小国；

【导师】 阮新波；

【作者基本信息】 南京航空航天大学 ， 电力电子与电力传动， 2003， 硕士

【摘要】 电压调节模块(VRM)是专门为计算机CPU供电的直流-直流模块电源，是现在电力电子界研究的一个热点和难点。未来CPU的供电要求是所需总功率增加，但电压越来越低(＜1V)，电流越来越高(＞100A)，动态速度越来越快，输出电压纹波也在降低，这一切为开关电源的设计者提出了前所未有的挑战。而48V输入的VRM是能满足未来这一需求的一个必然选择。 本文在理论分析方面：首先分析VRM的特点，回顾过去VRM的发展，接着详细分析其动态过程的特点，然后详细阐述48V输入VRM设计的难点、设计中应遵循的基本原则和现在常用的设计技术，在此基础上提出了一种新型的48V输入VRM的电路拓扑—交错并联的三电平正激变换器并对其工作原理、特点和优点进行详细的分析。 本文在实践方面：结合上面的新型三电平变换器拓扑，试制一台 48V输入，0.8V／100A输出的VRM，并获得较好的实验结果。文中详细分析了参数的设计过程。 本文最后总结了本文所做的工作，并指出未来进一步要做的工作。更多还原

【Abstract】 The DC-DC converter intently powering the CPU of computers is called Voltage Regulator Module(VRM),which has been attracting more attentions and has become a focus and challenge in the field of Power Electronics. For the future VRM, the output voltage is lower and lower(<lV) while the total power needed is higher and higher, thus a twofold output current increase is introduced(>100A). At the same time, a faster transient response with very tight output voltage tolerance is required. All these prompts unprecedented challenges for designers of power supply. To meet the requirements mentioned above, 48V input VRM has increasingly become a better solution.This paper presents both the theoretical analysis and practical experimental results of 48V input VRM.hi theory, this paper firstly analyzes the features of VRM and reviews the development of VRM. Secondly, the characteristic of its transient response are analyzed. Thirdly, the main difficulties , the basic principles and the popular technologies met with in the design of 48V input VRM are discussed in detail. And then a novel topology -rAn Interleaved Three-Level Forward Converter(ITLFC)-suitable for 48V input VRM is proposed and its operation principle together with its advantages and features are analyzed in detail.In practice, a prototype, based on the novel proposed topology, with a 48V input and 100A/0.8V output is built and the experimental results verify the theoretical analysis very well. This paper also presents the detailed design process of the prototype.In the end, this paper presents the evaluation of the present technologies for VRM design from a viewpoint of engineering. And the further work is pointed out as well.更多还原