Electrical Engineering - Re: dc electromagnet question?Kelly

You are viewing an archived Text-only version of the thread. To view this thread in it's original format and/or if you want to reply to this thread please [click here]

Author

Re: dc electromagnet question?Kelly

vick

2007-09-28, 3:25 am

Sent email: Most associates where I am from will not share info, because of
there fear of lose of having a edge I guess. Thank you again.
"Don Kelly" <dhky@shaw.ca> wrote in message
news:%40Li.8517$x%6.1139@pd7urf2no...
> ----------------------------
> "vick" <wvick@cox.net> wrote in message
> news:fjVKi.333393$dA7.289211@newsfe16.lga...
> -----
> If you use resistors, you will reduce the heating-but you will also reduce
> the force produced by the magnet in proportion. Using a lower voltage
> source will also do the same.-
> In that case increase the number of turns of wire to compensate -this will
> also add some resistance.
>
> For example, twice the number of turns (same wire) doubles the resistance
> and halves the current resulting in half the heating for the same
> force(proportional to ampere-turns)- but a bigger magnet. Life consists
> of tradeoffs.
>
> --
>
> Don Kelly dhky@shawcross.ca
> remove the X to answer
>
>

LinkBot