How to design a shielded enclosure?如何設(shè)計(jì)一個(gè)屏蔽室？
Make a choice做一個(gè)選擇
The cheapest materials for electromagnetic shielding are galvanized steel and aluminum. Approximately 90% of the cabinets and enclosures are today made of these materials. For that reason we have a special material (Amucor Shield) very well developed is compatible with both. When the ceclosure is used in a corrosive atmosphere is better to remove it from stainless steel, brass, or aluminum chromate layer (alochroom 1200).
用于電磁屏蔽最便宜的材料是鍍鋅鋼板和鋁。今天大約有90%的機(jī)柜和屏蔽室是由這些材料制造的。為了這個(gè)原因我們有一個(gè)特殊的材料(Amucor Shield) 被開發(fā)出來非常好的與這兩者一致。當(dāng)屏蔽室被使用在一個(gè)腐蝕性空氣里時(shí)最好的移開它從不銹鋼，黃銅，或鋁鉻酸鹽層(alochroom 1200)。
Corrosion protection is close to the sea (salt) and in outdoor applications is very important. Important that the gaskets electrically well the materials you are using. Request our free advice to any overseers.
防腐是靠近海（鹽）和在戶外應(yīng)用是非常重要的。重要的是你使用的墊圈是電性能良好的材料。
It is best to get them in a salty atmosphere within 0.3 volts and 0.5 volts in a wet atmosphere to hold the see table of values measured against galvanic silver.
在含鹽空氣環(huán)境獲得它們最好是在0.3V和0.5V以內(nèi)在一個(gè)潮濕空氣環(huán)境里獲取它們看表的測量值以防電化銀。
Thickness of enclosure material殼體材料的厚度
A thickness of 0.1mm will be enough for an efficient shielding above 1MHz. Only at low frequencies such as 10KHz and less important to well-magnetic conductive materials and thicker material. EMP example a military bunker, from 6mm thick material produced. This is because these scenes should be about 10 KHz and 80dB. Must also blocking at 50Hz be considered concentrated metal layers and special materials as Mu and Mu-ferrous metal. This application is to delimit the areas of the transformer to reduce health risks for humans and machines work without any failure.
一個(gè)0.1mm的厚度是足夠用于1MHz以上的有效的屏蔽。僅僅在低頻如10KHz，對于好的磁導(dǎo)材料和更厚的材料的重要性是更少的。EMP的例子一個(gè)軍用掩體，從6mm厚的材料產(chǎn)生的。這是因?yàn)檫@些地點(diǎn)應(yīng)該是大約10 KHz和80dB。必須也封閉在50Hz被推薦給金屬層，特殊的材料如鉬和鉬-鐵氧體金屬。這個(gè)的應(yīng)用是限定變壓器的區(qū)域以減少對人類的健康危險(xiǎn)和機(jī)器工作沒有故障。
Openings in enclosure機(jī)殼的開口
Especially at frequencies above 5KHz is important to prevent gaps in the enclosure. The high frequencies like 100MHz to 40GHz are very sensitive to small gaps in the enclosure. The higher the frequency the more attention should be paid to holes in the shield to avoid it. It is therefore important to use flexible gaskets. The gaskets should not only very well conductive but also a good electrical contact with low compression force can generate.
特別頻率在5KHz以上防范在機(jī)殼里的間隙是重要的。高頻如100MHz到40GHz是對機(jī)殼里的小間隙非常敏感的。更高的頻率要更應(yīng)注意這些間隙通過屏蔽以消除它。這是因此重要的要使用柔軟的墊圈。該墊圈應(yīng)不僅有非常好的導(dǎo)電性而且有一個(gè)好的用低的壓力能產(chǎn)生電接觸。
Fastener of mounts/hinges/locks裝配的緊固件/鉸鏈/鎖
We have special resilient gaskets such as Ultra Soft Shield designed. They prevent the bending between the attachment points of the hinges so not too heavy a draft of a case is possible. Also this cheaper fasteners, hinges and locks as well as with thinner sheet material is not permitted, which saves cost much.
我們有特殊的彈性墊圈，如超軟屏蔽設(shè)計(jì)的。它們防止在鉸鏈的附著點(diǎn)之間彎曲，因此不太重。而且這個(gè)更便宜的緊固件、鉸鏈和鎖也用更薄的鋼板是不被允許的，節(jié)省更多成本。
To give you an idea what type of gasket can fit on the stiffness scale on the vertical structure of your choice. The distance form the anchor points on the horizontal scale. At the intersection of both, you can find a recommended packing. Your drawing is better to send our specialists. They see every day more than 60 different designs and to specialize in giving you the right. This is generally free of charge.
It is important for us to know what type of material used and the amount necessary to help you quickly. Numbers may vary from our opinion 1 to 1000000 pcs.
