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Sci.Electronics.Basics -> effect of laminated plates on electro maget
There are 3 messages in this thread.
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Author: lerameurDate: 14:55 14-06-08
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hello,
I have two electro magnets with different thickness of laminated
plates, They are of different size but both gives relatively the same
Telsa output between 5v and 20v. Will I still get the same strength
(tesla) if I use 100v or 200v supply? ( i do not have access to that
amount of dc voltage) will the eddy effect be too strong and give
different output..
thanks
ken
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Author: John PopelishDate: 16:46 14-06-08
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lerameur wrote:
> hello,
>
> I have two electro magnets with different thickness of laminated
> plates, They are of different size but both gives relatively the same
> Telsa output between 5v and 20v. Will I still get the same strength
> (tesla) if I use 100v or 200v supply? ( i do not have access to that
> amount of dc voltage) will the eddy effect be too strong and give
> different output..
The laminations have no beneficial effect on the field
strength you get with DC. They are strictly intended to
reduce the circulating (eddy) currents when the coil is
excited by AC voltage. The field strength should be roughly
proportional to the voltage applied, but the heat production
goes up roughly in proportion to the square of applied
voltage. Are you talking about exciting these
electromagnets with AC or DC?
--
Regards,
John Popelish
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Author: lerameurDate: 18:33 14-06-08
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On Jun 14, 4:46 pm, John Popelish <jpopel...@rica.net> wrote:
> lerameur wrote:
> > hello,
>
> > I have two electro magnets with different thickness of laminated
> > plates, They are of different size but both gives relatively the same
> > Telsa output between 5v and 20v. Will I still get the same strength
> > (tesla) if I use 100v or 200v supply? ( i do not have access to that
> > amount of dc voltage) will the eddy effect be too strong and give
> > different output..
>
> The laminations have no beneficial effect on the field
> strength you get with DC. They are strictly intended to
> reduce the circulating (eddy) currents when the coil is
> excited by AC voltage. The field strength should be roughly
> proportional to the voltage applied, but the heat production
> goes up roughly in proportion to the square of applied
> voltage. Are you talking about exciting these
> electromagnets with AC or DC?
>
> --
> Regards,
>
> John Popelish
Hi John,
I will be using DC voltage, but I will redesign my coil.
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