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Power-User

Join Date: Jul 2009
Posts: 124

A Stupid Magnet Question

10/05/2010 8:12 AM

Hello I am curious I have a dual rotor with n50 mags, with a coil in between of course stationary.The magnets are attracting both magnets move together and see the coil at the same time standard rotor and coil set up. Here is my ? if I made one side of the rotor stationary behind the coil and the other side of the rotor spin would that still produce the same amount of electricity? The intensity of the magnet field would still be the same, and when that one magnet spins it would see the coil and the stationary magnet the same. Would it produce the same out come as both mags spinning on the rotors together?Or will I get no cut from the stationary MAG and only get cut from the moving mag on the spinning rotor.

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Guru

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#1

Re: A Stupid Magnet Question

10/05/2010 9:30 AM

Do I have the option of 50-50 since you already took away the phone-a-friend

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Power-User

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#2
In reply to #1

Re: A Stupid Magnet Question

10/05/2010 10:02 AM

you can have as many life lines as you need if it helps you answer my question. Or are you just telling me how stupid my ? is.

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#3

Re: A Stupid Magnet Question

10/05/2010 11:26 AM

Options:

  1. Read this.
  2. Send a personal message to CR4 users magnext and azeeco. They may be able to help.
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Power-User

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#4
In reply to #3

Re: A Stupid Magnet Question

10/05/2010 12:44 PM

thanks not looking for prepetual motion just tinkering with efficiancy

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#5
In reply to #4

Re: A Stupid Magnet Question

10/05/2010 7:17 PM

Can you post a diagram so we can get a clue about what you're up to?

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Associate

Join Date: Oct 2010
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#6

Re: A Stupid Magnet Question

10/06/2010 4:41 AM

There are two major problems with making one rotor stationary in this case that will lead to reduced performance.

1. Flux angle. The best performance occurs when the flux is at a sharp 90° to the conductor current path and 90° to the direction of travel. When you place one stationary, you allow the stationary flux to bend toward the moving magnet thus reducing the desired affect.

2. Magnetic shearing and reconnection. This occurs as each moving magnet passes on from one stationary connection to another. First it must shear the connection with the present stationary magnet and then it must connect with the next one in the series. When the field shears it causes flyback in the coil. Additionally, the inconsistent energy required to initiate the shear can often cause surging in the system and a variety of radial loading and vibrations all of which add to the losses of the system.

Depending on your actual configuration, Lenz's law may also play a much different role in the two configurations and should be given due consideration.

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Guru

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#7

Re: A Stupid Magnet Question

10/06/2010 6:57 AM

Your question is not very clearly stated. That is why you are getting the responses that annoyed you.

But from re-reading at least 5 times, I gather that you have a permanent magnet generator of some kind, with the magnets set on 2 rotors sandwiching the stator that will generate the power induced by the moving magnets.

1) When the 2 rotors are linked, The magnetic flux will be varying from full to zero without distorsions (mentioned already by...) and you might have a sinusoidal variation.

2) If the two rotors are separated, One fixed and one moving, as already mentioned, the magnetic flux will not be having the same amplitude variation, therefore less power might be generated, but also, your wave will be distorted and the outcome will most probably be less efficient and not a clean sinusoid.

Finally, you need to experiment and see for yourself since you think that the original maker might have missed the oppertunity to economise and have a more efficient design(?!).

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#9
In reply to #7

Re: A Stupid Magnet Question

10/06/2010 3:32 PM

Thank you for being so persistent and understanding my question and explaining what would transpire if I made these changes. My concerns were vibration and sinusoidal issues still going to experiment thought may iron core the coils and see what role that may play on the two rotors probably a waist of time but i have plenty of that.

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Guru

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#8

Re: A Stupid Magnet Question

10/06/2010 2:30 PM

Can you post a simple drawing as ''a picture is better than a thousand words''

[drawing has more significance]

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#10

Re: A Stupid Magnet Question

10/06/2010 4:25 PM

The original configuration provides the largest flux density variation and will produce largest induced voltage/current in the coils. I wouldn't waste any time or effort on the "one side stationary" approach for any practical applications since flux density will be approximately halved.

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Guru

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#11

Re: A Stupid Magnet Question

10/07/2010 12:40 AM

A Simple Magnetic Motor

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