Ferrofluid- electromagnets etc.

Projects General Guidance
1

Hello guys,

Im just starting a ferrofluid project.

I am trying to build a custom electromagnet with magnet wire and a piece of iron.
i wrapped 25 meters of wire and gave it 12 V , 1A but wasnt powerfull enough.

Ferrofluid seems to need loads of tesla.

Any suggestions for materials, or anyone with experience with that would be really helpful

thanks

2

billybouki:
Hello guys,

Im just starting a ferrofluid project.

I am trying to build a custom electromagnet with magnet wire and a piece of iron.
i wrapped 25 meters of wire and gave it 12 V , 1A but wasnt powerfull enough.

Ferrofluid seems to need loads of tesla.

Any suggestions for materials, or anyone with experience with that would be really helpful

thanks

I understand that the magnetic field is determined by the number of turns and the diameter of the coil. It appears that the diameter is constrained by the diameter of your iron core. The only option, therefore, is increasing the number of turns (longer wire) to get a stronger magnet. Of course, a longer wire = more resistance = less current, so you should also slightly increase the wire size to compensate.

3

thanks,

having some not so bad results.
trying to maximize my fields but getting massive amounts of heat from the magnet.

Trying to undertand the theory behind wire thickness, amps flowing , wasted power(heat), magnet shapes etc. a lot to consider.
here's an interesting article. http://sci-toys.com/scitoys/scitoys/magnets/calculating/calculating.html

any pointers are very welcome.

edit: any advice on where to find some proper magnetic ,iron core, m,aterial would be great

4

billybouki:
thanks,

having some not so bad results.
trying to maximize my fields but getting massive amounts of heat from the magnet.

Trying to undertand the theory behind wire thickness, amps flowing , wasted power(heat), magnet shapes etc. a lot to consider.
here's an interesting article. Chapter 1: Magnetism -- Calculating the strength of a magnet

any pointers are very welcome.

edit: any advice on where to find some proper magnetic ,iron core, m,aterial would be great.

It's known as a 'soft iron core'. You could try Googling that. There's also Ferrite, a product that can be used as a core and is available in most shapes and sizes.