Author Topic: Trying to fabricate electromagnet, requesting help please  (Read 16826 times)

Offline Bearcar1

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #15 on: July 24, 2014, 03:06:44 AM »
That sounds interesting, keep us posted with your progress.


BC1
Jim

Offline derekwarner

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #16 on: July 24, 2014, 04:27:25 AM »
 :old: ...."poles apart"  :LittleDevil: ....Derek
Derek Warner - Honorary Secretary [Retired]
Illawarra Live Steamers Co-op - Australia
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Offline nick

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #17 on: July 24, 2014, 08:14:18 AM »
I wound up a coil as a demonstrator for electromagnetism, it did work, but there were 2 'by products', heat (loads of it) and it hummed. I was using a bench power supply, the voltage was altered with a potentiometer, as I altered the voltage, the tone of the 'hum' altered. I could onkly have it on for a minute at the most before it got too hot.......
Who I am is best not discussed, for I have been many things in my time.....

Offline burnit0017

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #18 on: July 24, 2014, 11:52:14 AM »
Hi, for continuous duty, you have to limit the current. On my project I am just charging a capacitor and applying one pulse once per revolution. Thanks for info.

Offline dieselpilot

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #19 on: July 24, 2014, 02:25:32 PM »
Anti-gravity machine?

Offline burnit0017

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #20 on: July 24, 2014, 02:54:16 PM »
Hi, gravity assisted device. OverUnity is NOT possible. It will never produce more power than is being supplied from the output shaft. A step down DC to DC buck converter at the output of the PMA running at < 50% duty cycle removes the braking effect created from the back EMF. It is a basic MPPT circuit that works with a Permanent magnet alternator.

Video of circuit driving a 50 watt load, without the circuit I was unable to turn the PMA.
 
list=UUE--_X1h08StIiaSSxefTCg


I view generating electricity like pumping water. So using the MPPT circuit with mechanical advantage is the approach I am using. Again this is just a experiment. I will post results if and when I can get it to work. Thanks for showing interest. Cheers :stir:

Offline dieselpilot

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #21 on: July 24, 2014, 05:02:24 PM »
What is the goal?

Greg

Offline burnit0017

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #22 on: July 25, 2014, 12:14:58 AM »

Hi, I am working on a similar project for generating electricity.

Offline dieselpilot

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #23 on: July 25, 2014, 12:36:14 PM »
It's unfortunate those people have no idea what they are experiencing. They'd be better off replacing the pendulum mess with a flywheel. The direct operating demonstration of how difficult the work is, is wonderfully flawed. The length of the arm might be the same, but when he's swinging the pendulum by the crank arm he has Pi*D of distance as opposed to a few inches, the true length of the lever on the pendulum is much larger. I'm sure someone has told them, but it doesn't fit their agenda or business model. Simply adding a second mass to balance the other one would make it even easier to operate because gravity isn't helping at all.

Greg

Offline Admiral_dk

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #24 on: July 25, 2014, 08:14:10 PM »
Nice idea - but it's kind of made already ....

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

This one only works on flowing water, so It would be nice for a similar device to fit a well. On the other hand - they do exist as simple windmills. Making one that runs on solar power is a good idea.

Offline burnit0017

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #25 on: July 26, 2014, 08:27:17 PM »
<a href="http://www.youtube.com/watch?v=ktM0sDQnmpo" target="_blank">http://www.youtube.com/watch?v=ktM0sDQnmpo</a>
video showing manual operation

Hi, I fabricated a quick frame to identify the problem areas. The biggest problem is I need the electromagnets to trigger at 0 and 180 degrees. The mechanism will only allow for triggering at at 90 and 270 degrees. Is there a mechanical configuration that I can use that will help or allow the trigger location to shift 90 degrees.  The electromagnet are pulsed with power so they are on for only a short time. . 

Offline burnit0017

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #26 on: July 27, 2014, 11:14:24 PM »
<a href="http://www.youtube.com/watch?v=SaHEUQdmbRs" target="_blank">http://www.youtube.com/watch?v=SaHEUQdmbRs</a>

Hi, I found a configuration that may solve my problem. I will try replacing the pistons with the electromagnets.

Offline dieselpilot

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #27 on: July 28, 2014, 03:04:23 AM »
That brushless motor you're using as a generator could be up to 80 or 85 percent efficient. Anything connected to it that results in power loss reduces that. This includes the bearings, gears, any reciprocating mass, and I'm not even sure where the electromagnets come into play.

If we agree that greater that unity is not possible and the generator being used is ~80% what is the projected efficiency of the device you're building?

Greg

Offline burnit0017

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #28 on: July 28, 2014, 10:48:11 AM »


Hi, I am experimenting with gravity assisted power. The final configuration will have a flywheel with shifting weights. The PMA will charge a large capacitor that will provide power to the electromagnets once per revolution. The movable weight on the flywheel will shift toward the center on half of the revolution creating a over balanced wheel. So I am testing to determine if the combination of the flywheel configuration and the feedback from the electromagnets will produce a working device. If not I can add a external power source or replace the electromagnets with steam cylinders. Again this is just a experiment.

Offline dieselpilot

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Re: Trying to fabricate electromagnet, requesting help please
« Reply #29 on: July 28, 2014, 01:23:54 PM »
Do you understand why the pump you posted has no help from gravity?