How To Make A Power Generator

Archive for the ‘magnet generator’ Category

I’m trying to create electricity to power a small computer fan by spinning a neodymium magnet surrounded by copper wire. My problem is the fan, like many things, has a positive and negative lead and so if I hook up the power from the copper coil to the positive lead then where would I attach the negative lead so that It completes the circuit?

The fan has 2 leads, and the copper coil has 2 leads, so hooking the two together should be easy. However, there are other potential problems with your experiment:

1. Please watch this animation for a simple DC generator:

Observe that the output wires are pressing against a SPLIT-ring "commutator". This split-ring automatically switches the polarity every 1/2 rotation. Without a split-ring commutator, the output of this simple generator would be AC and not DC.

2. I would suggest that you experiment with a simple DC generator or dynamo — like the kind that rides against a bicycle tire, to power a bicycle light — before you attempt to build your own DC generator from scratch. The reason is this: your home-made generator (first attempts) will only be a few % efficient, so they won’t power the small computer fan.

Good luck!
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I’m trying to create electricity to power a small computer fan by spinning a neodymium magnet surrounded by copper wire. My problem is the fan, like many things, has a positive and negative lead and so if I hook up the power from the copper coil to the positive lead the where would I attach the negative lead so that It completes the circuit?

Your wire has two ends, and depending on the orientation of your magnet relative to the loop, the direction you wound the loop, and the direction you spin the magnet, one wire will be positive, and one will be negative. The magnet needs to be oriented and spun so that the loop passes through the poles of the magnet. If the magnet poles and coil are lined up so that the poles don’t move in relation to the loop, you won’t generate any current (for example, the coil is laid on the horizontal plane, the magnetic poles are aligned vertically, and you rotate the magnet so that the poles stay vertical).

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I’m trying to create electricity to power a small computer fan by spinning a neodymium magnet surrounded by copper wire. My problem is the fan, like many things, has a positive and negative lead and so if I hook up the power from the copper coil to the positive lead then where would I attach the negative lead so that It completes the circuit?

The fan has 2 leads, and the copper coil has 2 leads, so hooking the two together should be easy. However, there are other potential problems with your experiment:

1. Please watch this animation for a simple DC generator:

Observe that the output wires are pressing against a SPLIT-ring "commutator". This split-ring automatically switches the polarity every 1/2 rotation. Without a split-ring commutator, the output of this simple generator would be AC and not DC.

2. I would suggest that you experiment with a simple DC generator or dynamo — like the kind that rides against a bicycle tire, to power a bicycle light — before you attempt to build your own DC generator from scratch. The reason is this: your home-made generator (first attempts) will only be a few % efficient, so they won’t power the small computer fan.

Good luck!
————————-

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The field excitation generator needs a DC voltage through coils of wire to establish a magnetic field before the generator can produce an output.

A permanent magnet generator does not need a DC voltage to produce an output. The permanent magnet establishes the magnetic field.

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It is non-magnetic itself and is made of a chain mail style wave.

I think it’s just a brass spacer, necessarily non-magnetic.
http://www.microwaveovenappliances.com/taking-apart-a-magnetron-from-a-microwave-for-the-magnets.html

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