多模組並聯電源轉換器之均流控制設計與實現

Design and Implementation of Paralleled Multi-Module Power Converters with Current-Sharing Control

賴聖凱(Sheng-Kai Lai)

指導教授 ： 練光祐

國立臺北科技大學/電資學院/電機工程系所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00387

摘要

隨著科技產品的進步，電力設備的需求也日益提高，而電源轉換器的並聯使用可以提供高可靠度及高功率輸出的電源供給需求，但並聯後的電源轉換器必須藉由均流技術來確保每個模組的輸出電流可以相同；因此本論文中，提出一種改良式的內迴路架構，可以更方便快速的應用在市面上常見的PWM控制IC上，使多模組並聯DC-DC電源轉換器的最大電流模組可以調整其他模組的回授電流，來達到均流的效果，讓電流平均的分配至每一個模組中，使各模組的輸出功率平均化，改善多模組供電的效率問題，並能穩定的供應電源。我們利用升壓轉換器的數學模型，推導出多模組並聯升壓轉換器均流誤差方程式，並針對此方程式的輸入電壓項及輸出負載項做不確定量的穩定性分析以求得控制器增益，使多模組並聯升壓轉換器的輸入電壓及輸出負載在設計範圍內均能穩定地受到控制，以提高穩壓以及均流的效果。

關鍵字

升壓轉換器 ； 均流控制

並列摘要

With the advances in science and technology products, the requirements of electrical equipment are getting increasingly. Paralleled modules used for power supply can provide high reliability and steady current output. However, paralleled DC-DC converters require current-sharing techniques to ensure that the load current can be equally distributed to each converter. Hence, we propose an improved version of inner-loop structure which can be applied to general PWM control ICs more conveniently and rapidly. To achieve the effect of current-sharing control, the largest current module in the paralleled multi-module DC-DC converter regulates the feedback current to other modules, until the current is divided averagely to each module. Lyapunov stability method is used to analyze the error equation of the circuit system whereas the polytopic uncertainties are considered due to the variation coming from the input voltage and output load. We formulate the problem into LMIs and obtain compensator gains. Thus, the voltage stabilization and current equalization can be enhanced through the proposed structure in this thesis.

並列關鍵字

Boost Converter ； Current-Sharing

參考文獻

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