Aboutcleggsan Expertise All technical areas of Electronics Engineering.
Experience BSEE, MBA, Design, R&D, University Research.
Senior Life Member of IEEE. Life Fellow of AES.
Organizations IEEE, Consumer Electronics Society, Audio Engineering Society.
Broad teaching experience; work experience mostly in consumer electronics and conversion from analog to digital technologies. Pioneer in digital audio at all levels.
Question QUESTION: I want to design a electromagnet which can produce a magnetic field of 1T,is rectangular in shape,having dimensions of approximately 1m in length,10cm in height and 12cm in breadth,consuming as low power as it can consume.so what are the specifications required.Furthermore what is the magnetic field at a distance 'd' from electromagnet.Is it constant at any point situated at distance d
The above does not relate to the type of design you are asking about but the principles of how to proceed are good for your consideration.
The materials used, the size of the wire, the geometry of how the coil and core are configured, the metal surfaces around where the coil and other magnetic materials are located all have significant effect.
In your case, if you really mean a 1 meter shape it is pretty huge. What do you mean by a field strength of 1T? Is this a bar magnet you want to design? And what is its intended purpose or application? Usually, the field strength is given in maxwells or lines of force. And, usually there is a gap so the lines of force can be focused into a small volumetric space for increased intensity for the field location to interface with the induced object. Take for example the loudspeaker mechanism where the voice coil is embedded in the narrow circular gap between the pole piece and the magnetic circuit which keeps the field focused tightly into the gap for maximum transfer of induction into the moving coil.
The magnetic field strength cannot hold up greater than 6db down for each doubling of distance; and probably less due to leakage and field distortions caused by nearby metal objects.
Let me know more after your study. We can take it to a higher level once you know what to do.
C
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QUESTION: magnetic field or flux density of 1T is 1tesla or weber/meter^2.I want to build the electromagnet for production of electricity from by the motion of train.what type of magnet should i use eg plunger type,flat faced armature,circular etc.the index number suggests me to use plunger type magnet.another major problem in large electromagnets is of heat dissipation is their any way to reduce these losses.can permanent magnets be used which will meet my dimensions and required magnetic field and what does 6db means??if magnet of such dimension is difficult then can small electromagnets kept in a particular sequence produce the same effect as that produced by the big one...
Answer Sorry, but I don't understand the purpose and the application for your magnetic system.
One Tesla or webers/meter^2 is a strong field to generate without iron plates to focus the field to a narrow gap.
How much voltage, current or power are you expecting to achieve as the train goes by and what are the moving parts? A coil on the train or a stationary coil with the magnet attached to the train as it goes by? And what is the distance between the coil and the magnet?
