ELECTROMAGNETS

[ScienceBorn]

I created an electromagnet by wrapping a coiled wire round a nail and finally connected it to a 1.5v battery and a switch. When ever i disconnect the flow of current through the coil, the electromagnet becomes weak, does it mean that electromagnets is temporal and works only when there is current flowing through the coils? Can i apply the working principle of electromagnets in a fan to create a magnetic field in between the spaces of the fan to make it move without the fan being powered?

 

[ScienceBorn]

Here is the diagram of what i did.

 

[ScienceBorn]

NOTE-my main aim of doing this was not to create an electromagnet but to know if there is any possibility of applying electromagnetic principle in fans to get it powered without electricity.ANY IDEA?

 

[Laplace]

If you don't supply electricity to the fan, then where will the energy come from to turn the fan blades?

 

[(*steve*)]

does it mean that electromagnets is temporal and works only when there is current flowing through the coils?

That is true.

However you can magnetise the nail (or whatever) so that it retains some magnetic field after the current has been removed. The strength of this residual field will likely be quite a bit weaker than the magnetic field while the current is flowing.

Can i apply the working principle of electromagnets in a fan to create a magnetic field in between the spaces of the fan to make it move without the fan being powered?

No.

 

[ScienceBorn]

If you don't supply electricity to the fan, then where will the energy come from to turn the fan blades?

the energy can come from a chargeable battery.

 

[ScienceBorn]

That is true.

However you can magnetise the nail (or whatever) so that it retains some magnetic field after the current has been removed. The strength of this residual field will likely be quite a bit weaker than the magnetic field while the current is flowing.



No.

what i was thinking was to wrap coils of wires to the blades of the fan then use a chargeable battery to power it. A blade will use one chargeable battery then the three blades will use three chargeable batteries(i.e one for each). The idea of using the chargeable batteries is to keep them charging when there is electricity flowing through the fan, it stop charging when there is no more electricity flowing through the fan then the fan starts moving when it is no more powered by electricity(since the battery is already charged and there are coils wrapped round the blades, connected to the batteries already charged). Please i need to know if this will work, if it won't why?

 

[davenn]

what i was thinking was to wrap coils of wires to the blades of the fan then use a chargeable battery to power it. A blade will use one chargeable battery then the three blades will use three chargeable battere(i.e one for each). The idea of using the chargeable battery is to keeping it chargeable when there is electricity flowing in the fan, it stop charging when there is no more electricity flowing in the fan then it start moving(since the battery is already charged). Please i need to know if this will work, if it won't why?

That makes absolutely no sense at all
what are the fan blades made of ?
even if they are made of iron, wrapping coils of wire around the blades and powering the coils isnt going to make the blades turn ..... so what's the point ??

Dave

 

[ScienceBorn]

I thought wrapping the coils of wires round the three blades produces a magnetic field inbetween the spaces creating a magnetic force(i.e as the blades trys to attract each other) causing it to move? I am actually using a standing fan where the distance of the blades is much closer.

 

[Harald Kapp]

Movin a wire or a coil doesn't produce a magnetic field.
A wire or coil produces a megnetic field, when a current flows through the wire/coil.
Or it produces a current when moved through a magnetic field.

You may want to read this treatise on induction for further clarification.

 

[duke37]

It seems like you are wanting to make an electric motor to drive the fan.

The battery supplies electricity.
The electricity makes a magnetic field in the motor.
The motor rotates to energise a different winding.
The process is repeated.

You can get fans coupled directly to well designed motors which can be operated with the appropriate power supply.

 

[ScienceBorn]

It seems like you are wanting to make an electric motor to drive the fan.

The battery supplies electricity.
The electricity makes a magnetic field in the motor.
The motor rotates to energise a different winding.
The process is repeated.

You can get fans coupled directly to well designed motors which can be operated with the appropriate power supply.

thanks. You are right! "the battery supplies the electricity, the electricity makes a magnetic field in the motor, the motor rotates in a clockwise direction to energise a different winding". Yeah! Yeah! Thats what am talking about, thanks.

 

[ScienceBorn]

You may want to read this treatise on induction for further clarification.

yeah Harald. Faraday's law and all that. Am happy to inform you i learnt alot from that, thats nice of you, thanks.

 

[KrisBlueNZ]

Just a heads up, ScienceBorn, if you're trying (again) to work towards a "perpetual motion" / "over-unity" system:

(a) No such device or system has ever worked in the past, despite people's best efforts;

(b) Devices and systems that have claimed to do this either have been shown to be scams, or cannot be properly investigated because the so-called inventor will not permit it;

(c) The current laws of thermodynamics - the principle that energy can neither be created nor destroyed - have been found to hold true in all properly conducted tests;

(d) Most of the people here at Electronics Point are engineering-oriented and aware of the laws of science; you will get little or no support with any pursuit of any "over-unity" attempts. Most of us regard it as a pipe dream and a total waste of time;

(e) Many forums explicitly ban discussion of the topic because it never leads to anything useful and only serves to waste contributors' time.

 

[ScienceBorn]

Thanks for the writeup Kris. One question for you: does it mean that to create a device scientists havent created before, the device must obey the laws of science?? Am curious.

 

[KrisBlueNZ]

I think it's simpler to think like this: "Over-unity" devices are currently considered impossible by definition. If you can demonstrate that the current scientific understanding of the nature of reality is wrong, and you have collected your Nobel prize and worldwide fame and fortune, you can create your over-unity device with no trouble at all.

And a direct answer to your question: Yes.

 

[BobK]

Do you understand how an electric motor works? It uses electromagets and sometimes permanaent magnets to provide the force. But the magnets must be turned on and off in synchronization with the movement, otherwise, when they hit the closest approach they will just stop. You seem to want to make them turn without this switching. If you could do that, then you could make it spin using only permanent magnets and would have a perpetual motion machine. It is impossible.

Bob

 

[(*steve*)]

Here is a motor that doesn't require switching and uses a permanent magnet.

It's not practical though (or efficient)

 

[ScienceBorn]

Thanks *steve* i now understand fully well how all these things work. I really appreciate your effort guys.

 

[DLD]

It is quite easy to build electromagnet. What you need to do is wrap insulated/conductive copper
wire around nail (iron core) core and it will become magnetize after connecting wire
connection.The iron core will lose its magnetism when disconnected from battery. Magnetic Field is created when wire charge flows. If you connected blades and wrap by insulated/conductive copper, then it will not matter about blade distance (must
in magnetic field). According to Faraday’s law we know that he got relativity in-between
electricity and magnetic.
You may also what to check for detail knowledge:

http://en.wikipedia.org/wiki/Electromagnetism