適應性電流分配控制之多電源模組並聯研製

Design and Implementation of Multiple Power Module with an Adaptive Current-Sharing Control Technology

陳伏松(Fu-Sung Chen)

指導教授 ： 歐勝源

國立臺北科技大學/電資學院/電機工程系所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00660

摘要

本篇論文實現了一種多電源模組之適應性電流分配控制策略，該策略可解決當多部電源模組為了提供高功率需求之並聯模式下，所產生之輸出電流不平衡的問題。直接將數部電流模組並聯及均流是最簡單且容易的控制方法，但是通常容易導致工作中的電源模組發生輸出電流不平衡的現象，所以系統中的部份並聯模組將會產生過載的錯誤工作情況，甚至導致模組的損壞。因此，為了使每部電源模組輸出電流達到平衡，均流平衡解決方法一般是在每部電源模組中增加電流控制IC，而該策略通常應用於備援系統，但其相等比例之均流控制減少了應用上之彈性。本文提供一個簡單而且不增加成本的方法，該方法只需搭配現成的控制IC，進行簡單的修正即可達到輸出比例電流控制的目的。
本文將討論及闡述電流不平衡的問題、電流分配的控制理論及提出能夠輕易實現所需的電流分配控制方案。為了驗證所提出的控制方案，研製了一部包含兩個電源模組的電源供應器。該電源供應器的輸出為20V/6.75A，輸出功率為135W。組成該電源供應器的其中一個模組為輸出20V/4.5A的90W電源模組，另一個模組為輸出20V/2.25A的45W電源模組。
實驗結果驗證了理論的分析和所提出之控制方法的可行性，實際量測的波形展現了所需的比例電流分配的功能。

關鍵字

適應性電流分配控制 ； 多電源模組 ； 比例電流分配

並列摘要

This thesis implements an adaptive current-sharing control strategy for multiple power module to solve the output current imbalance problem while some power modules are paralleled to provide higher power the load requires. Directly shunting several power modules is the simplest and easiest control method, but generally easy to result in the output current imbalances of operating modules so that some paralleled modules will be overloaded to mistake the operation even damaged. Therefore, one of the solutions to balance each module current uses the current control IC in each module, that is often used in a redundant system, but the same percentage current-sharing control method will decrease the system flexiblility. Thus, this thesis provides a simple and low-cost proportional current-sharing control method using off-the-shelf control IC which only needs to be simply and easily modified.
This thesis still discusses and illustrates the issues of current imbalance, the current-sharing control theory and the proposed control scheme to easily implement the required control function. A multiple power supply comprised of two power modules is implemented for verification of the proposed control in which one module has the design specification including output voltage 20V, maximum output current 4.5A, and maximum output power 90W, the other has output voltage 20V, maximum output current 2.25A, and maximum power 45W. The total multiple power module has maximum output current 6.75A and maximum output power 135W.
The experimental results verify the theoretic analysis and feasibility of the proposed control method, and show the required proportional current-sharing function with actually-measured waveforms.

並列關鍵字

Adaptive current sharing control ； multiple power module ； proportional current-sharing

參考文獻

[44] 許昌源，“新型零電流切換之升壓型功率因數修正器的研製”，國立台北科技大學電機工程所碩士論文，2008年。

[4] 侯文傑， “並聯直流電源供應器自動主僕均流技術之研究”，國立成功大學電機工程研究所碩士論文，2004年。

[45] N. Mohan, T. M. Undeland and W. P. Robbins, “Power Electronics, Converters, Applications and Design,” New York: John Wiley & Sons, 2003.

[38] F. Q. Wang, H. Zhang, X. K. Ma and X. M. Li, “Analysis of Medium-Frequency Oscillation in the Boost Power Factor Correction Converter with Average Current Mode Control,” Acta Physica Sinica, vol. 58, no. 10, pp. 6838-6844, 2009.

[53] M. H. Rashid著，張天錫譯，“電力電子學 第三版”，台北：東華書局，2004年。