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电气专业毕业论文外文翻译【必威体育精装版】_精品
本科毕业设计
外文文献及译文
文献、资料题目:Designing Stable Control Loops
文献、资料来源:期刊
文献、资料发表(出版)日期:2010.3.25
院 (部): 信息与电气工程学院
专 业: 电气工程与自动化
班 级:
姓 名:
学 号:
指导教师:
翻译日期: 2011.3.10
外文文献:
Designing Stable Control Loops
The objective of this topic is to provide the designer with a practical review of loop compensation techniques applied to switching power supply feedback control. A top-down system approach is taken starting with basic feedback control concepts and leading to step-by-step design procedures, initially applied to a simple buck regulator and then expanded to other topologies and control algorithms. Sample designs are demonstrated with Math cad simulations to illustrate gain and phase margins and their impact on performance analysis.
I. INTRODUCTION
Insuring stability of a proposed power supply solution is often one of the more challenging aspects of the design process. Nothing is more disconcerting than to have your lovingly crafted breadboard break into wild oscillations just as its being demonstrated to the boss or customer, but insuring against this unfortunate event takes some analysis which many designers view as formidable. Paths taken by design engineers often emphasize either cut-and-try empirical testing in the laboratory or computer simulations looking for numerical solutions based on complex mathematical models. While both of these approach a basic understanding of feedback theory will usually allow the definition of an acceptable compensation network with a minimum of computational effort.
II. STABILITY DEFINED
Fig. 1. Definition of stability
Fig. 1 gives a quick illustration of at least one definition of stability. In its simplest terms, a system is stable if, when subjected to a perturbation from some source, its response to that perturbation eventually dies out. Note that in any practical system, instability cannot result in a completely unbounded response as the system will either reach a saturation level – or fail. Oscillation in a switchi
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