常用之工業機箱散熱網孔之型式與尺寸對於EMI/EMC之效果與影響

The effects of types and sizes of holes on the EMI/EMC of the industrial chassis

陳宏立(Hone-Li Chen)

指導教授 ： 賴光哲

大同大學/工程學院/機械工程學系所/碩士(2006年)

摘要

本文研究的目的，在於探討目前於網路、通訊業界中常見之標準工業用機箱，其於機箱上所切割之散熱網孔尺寸，對於在EMI/EMC抑制之成效，與其型狀及排列方式之最佳化選擇。
筆者之所以以此題目做為研究之方向與論文，實是在今日人們對於電磁波所形成的人體之影響與傷害，有逐漸重視之趨勢。而目前在工業機箱之生產界中，對於此方面的正式研究卻並不多見。因此，在本文當中，採用標準的EMI/EMC實驗室與量測設備將一系列在業界中較常見之各種排列組合型式、尺寸之方型與圓型網孔之設計透過實際量測與分析的方式，來了解它們在300kHz～1GHz的模擬頻率當中，對於EMI/EMC的實際屏蔽效果為何。而經由實驗之後，我們也了解到，在整體的屏蔽效果上是以圓型的開孔方式較方型的開孔方式來的優秀。冀望能從本研究中的各項探討與實驗結果，能夠對於其他有志研究與了解的業界的先進們，提供一些個人之卓見。

關鍵字

工業機箱 ； 網孔 ； EMI/EMC

並列摘要

The study purpose of this article is research in those common industry chassis of network and communication at present, it cuts the size of radiation network hole in the industry chassis which has the best choice of the shape and the way of arrangement to the result of control in the EMI/EMC. Why I do this research is because of electromagnetic wave that becomes seriously injury problem to people’s body & health so much today, and people face this problem now already more and more. But, so far, in industry chassis market, there is not so many articles were issued on it. So, in the thesis, we use the standard laboratory and instruments of EMI/EMC to proceed the serial tests of Square & Circular holes with many sizes and permutation of the normally specs in the industry chassis market. From these models, we can to understand the simulate status in the frequencies of 300kHz～1GHz and their true effects of the EMI/EMC. After a Series of experiment, we can know that the types and sizes of holes that the way of cover efficiency on circular holes is better than square holes!
Thus, it interests me to study this subject, and also I would like to present some my personal idea to the people who is interesting the same project reference.

並列關鍵字

EMI/EMC ； industrial chassis

參考文獻

[1] IEEE Guide for Safety in AC Substation Grounding. IEEE Std. 80, 2000.

[3] R. J. Plowman, “Wire & Plates an Introduction to Grounding &

Shielding”, IEE (The Institution of Electrical Engineers.) Seminar on 27.

[4] A. J. G. Swainson, “Reciprocity in Electromagnetic Shielding”, IEE

Seminar on 27.Jan. 2000, pp.8/1-8/6.