|
How to design a shielded enclosure?
Make a choice
The cheapest materials for electromagnetic shielding are galvanized steel andaluminum. Approximately 90% of the cabinets and enclosures are today made of these materials. For that reason we have a special material (Amucor Shield) very welldeveloped is compatible with both). When the enclosure is used in a corrosiveatmosphere is better to remove it from stainless steel, brass, or aluminum chromatelayer (alochroom 1200).
Corrosion protection is close to the sea (salt) and in outdoor applications is veryimportant. Important that the gaskets electrically well the materials you are using.Request our free advice to any overseers (direct support: 078 6131366)
It is best to get them in a salty atmosphere within 0.3 volts and 0.5 volts in a wetatmosphere to hold the see table of values measured against galvanic silver
Thickness of enclosure material
A thickness of 0.1 mm will be enough for an efficient shielding above 1 MHz. Only at lowfrequencies such as 10 kHz and less important to well-magnetic conductive materials and thicker material. EMP example a military bunker, from 6 mm thick materialproduced. This is because these scenes should be about 10 kHz and 80 dB. Must alsoblocking at 50 Hz be considered concentrated metal layers and special materials as muand mu-ferrous metal. This application is to delimit the areas of the transformer toreduce health risks for humans and machines work without any failure (see http://www.faradaycages.com)
Openings in enclosures
Especially at frequencies above 5 kHz is important to prevent gaps in the enclosure.The high frequencies like 100 MHz to 40 GHz 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 notonly very well conductive but also a good electrical contact with low compression forcecan generate.
fstand of mounts / hinges / locks
We have special resilient gaskets such as Ultra Soft Shield designed. They prevent thebending between the attachment points of the hinges so not too heavy a draft of a caseis possible. Also this cheaper fasteners, hinges and locks as well as with thinner sheet material is not permitted, which saves cost much.
To give you an idea what type of gasket can fit on the stiffness scale on the verticalstructure of your choice. The distance from the anchor points on the horizontal scale. At the intersection of both, you can find a recommended packing. Your drawing is better tosend our specialists. They see every day more than 60 different designs and tospecialize in giving you the right. This is generally free of charge.
You can export your drawing via fax (078 -6149585) or send a mail
It is important for us to know what type of material used and the amount necessary tohelp you quickly. Numbers may vary from our opinion 1 to 1,000,000 pcs
|
