### Author Topic: magnets and voltage  (Read 1670 times)

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#### gamefreak

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##### magnets and voltage
« on: October 17, 2007, 06:50:51 PM »
Since DC motors work as dynamos due to the alternating magnetic fields, is it possible to boost voltage or current by having strong magnets near the wires? It just seems random how magnetics and electricity are so intertwined...

also, as i just found out, you can have electro magnets replace the permanent magnets, so therefore isnt it possible to have the dynamo create its own magnetic field(it would have to start with a magnet which would later be removed) and as it kept going wouldn't it create an exponential amount of voltage(until the coils melted)

or would the fields just become so strong they would overlap and then the motor would cease working?
« Last Edit: October 17, 2007, 06:55:04 PM by gamefreak »
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#### paulstreats

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##### Re: magnets and voltage
« Reply #1 on: October 17, 2007, 08:35:37 PM »
having a magnet next to a wire wouldnt increase voltage, what would happen on a small scale is the electrons may become more attracted to the positive of the magnet and try bunching there.

The self propelling motor you suggest would lose energy through heat and light and friction therefore losing momentum and slowly stopping - you cant make energy from nothing. real perpetual motion doesnt exist. although the idea of using 2 coils as electromagnets is actually used to transform ac electicity into other voltages