Repelling Action of Electromagnets

Why not use an electric motor?

Thank you for your reply. In my project the use of an electrical motor would be not be practical.

Magnets are embedded along the rim of a rotating disk. As the disk rotates each magnet will approach the north pole face of the electromagnet. A sensor will be positioned so that a DC voltage will be applied to the EM. A pulsing curcuit will be involved activating the EM. The timing is critical since the magnets have to be activated when each magnet is just above (assuming the disk is rotating clockwise). The magnet arriving below the activated Em would be repelled causing a power loss. i should have been more clear when I posted.

The more I think about it, I should have done some serious experimenting ( clearance of the pole faces of the PM and the EM., strength of the magnets, EM, etc.) before asking a question on the Forum. Just thought someone might have had some experience with repelling action of magnets.

Again thanks for your thoughts.

Bill D

Sounds like another "revolutionary" motor design is coming.

Try googling 'free energy devices' where I have found a variety of interesting aparati. The basis of many of these is the interplay of magnets with particular focus on their relative position(s). Frankly I see these (including fossile fuel burning motors which are converted into clean burning 'whatever' fuel motors/see 'the 'geet' system) as the best kept secret on the planet. You smart &/or rich guys out there need to get off your fanny & bring these to market. Look up 'John Newman' for an example of the where our new frontier lies. Thanks Carlitos

"The choices you make might be a mistake- but it is never too late to turn around." Tony Lang - musician

There are many ways to do such a thing. Is the disk going to be under a significant load? Or are you shooting for high frequency? My first thought is to give yourself plenty of magnet surface area so that after the midpoint of the field there is still plenty of magnet field to interact with. A radially oriented field is one way. The field could be axially oriented and allow two coils, one on top and one on bottom to work in tandem.

Let's assume you wish to keep the magnets orientation radial. The optimal field for each magnet would be to have the greatest field strength at its midpoint, however, a magnet is usually weaker at its midpoint. Solution example: on the back side of a magnet of 1 inch in length place another magnet 1/2 inch in length and centered, effectively increasing the field strenth at the midpoint of each magnet. You are creating a magnetic wedge of sorts, like stepping on a banana!(excuse the analogy)

As first post said, it is electric motor.

Did you go for the exact cooncept of DC motor ? it does exactly that (But I think it attracts instead of repelling) Commutator take care of the positional changes as the rotor rotates.

Actually, sounds a little more like a stepper motor, which is of course a form of DC motor.

Sounds more like a brake than a motor to me. Have you considered just moving a sheet of aluminium past an electro magnet. Although this is mechanically very simple: it effectively creates a combined electrical generator and motor. Eddy current are induced in the aluminium which then react against the movement of the sheet.

You can easily try it with permanent magnets from the head positioning part of an old hard disk drive. Just hold the two magnets slightly apart (they are often glued to bits of metal which do just that), and, drop a thin strip of aluminium through the gap. Everything moves in "slow motion" until the strip drops out of the gap. Makes a very compulsive little toy.

I would recommend you to use a simple Hall sensor circuit, which solves your dilemma. Go online and google "Hall sensors applications" or on Wikipedia and 'voila' you'll have what you need.

I appreciate all of the replies I have received (ffej, Valdez, Palinurus, SB,, J Raef, Randall, Dumitru) as result of my original post.:.

In my continuing experiments I will consider your suggestions.

Let me give you a better insight into what I am attempting to accomplish. On a shaft I plan to have a flywheel and by manual means spin the flywheel to the highest rpm possible..

In my earlier post I mentioned a rotating disk. The disk is actually a flywheel with permanent magnets embedded in the rim of the wheel and electromagnets that deliver periodic pulses to keep the flywheel rotating at the same rpm

What do I hope to accomplish? To provide a massive rotating flywheel delivering sufficient torque at shaft output to drive a magnetic gearing system with a higher rpm to directly drive a small generator producing electrical power. A conventional rectifier would produce 12 volts to charge a network of batteries including a battery provide DC current to activate the electromagnets used to force the permanent magnets on the rim of the wheel upwards (assuming a clockwise motion of the shaft)

An electronic control module would provide the timing of the activation of the EM by use of sensors attached to rim of the flywheel. One or more of EM's would be used.

It would be better to have the flywheel rotate a higher rpm than that of manual starting of the wheel. The system I have planned will be a low speed, high torque device.

I don't claim any originality in my planned work since I have researched work of others and merely replicating some of their work. The following link is a good source of open source projects especially Chapter 6. I have been inspired especially researching the work of John Bedini.

My only goal is to have a working system that I can use at my small ranch property to supplement use of solar power in the charging of batteries and producing low power lighting.

http://www.free-energy-info.co.uk/

Bill .D

Sorry, when you said: "The magnet arriving below the activated Em would be repelled causing a power loss." I thought that was the aim: you've used the terms above and below assuming that we know the orientation of your fly wheel.

Looking at the site you've linked:-

This is because the power which charges the batteries flows from the environment and not from the driving battery.

is a complete load of bollocks I don't think that this can be strictly true.

In your own implementation: why do you think it will take less power to keep the flywheel turning than you will be able to generate at the "output"?

Please don't waste your time and effort on this. You'd be much better off looking at say VAWTs (Vertical axis Wind Turbines): two half fifty gallon oil drums mounted on an old car axle make a great Savonius rotor.

See several posts by Lapinbleu for example in this thread:- http://cr4.globalspec.com/thread/17270

I agree with R

Please look from the system approach.

You are using electricity to run a flywheel - to run a generator - to get electricity.

There is no other source of energy (the gravity will not matter here since it balances out)

So there will be a nett loss in the system and the electricity even at 12V will be more than what you get out of the generator.

What will be far better is to use the environ (solar/wind) to charge batteries and use inverters (much higher efficiency than mechanical systems) to convert to AC and step up as required.

What you are trying is a sort of a PMM

In my last post, my link was only for Chapter 6. Most importantly, I should have also included a link to Chapter 4 (Gravity Pulsed Systems). Please refer to Bedini Pulsed Flywheel 4 -7,8 and the comments. This pulsed flywheel along with the battery charging circuitry technology of John Bedini (covered in Chapter 6) was the basis of why I would want to attempt to build a working model.

But, I am certainly not committed to continue with my experimental stage.. Lately, I have been researching other work I could consider that are not as expensive, and simpler to build and modify for my purposes. The work of Veljko Milkovic and his pendulum – lever system covered on page 13 of Chapter 4 (Gravity Pulsed Systems) is a project I could consider.

Well, anyway when I finally come down from the clouds (?), I will probably consider pursuing something like the Vertical Axis Wind Turbine.

Thanks for the critique, Randall & sb

Bill D

http://www.free-energy-info.co.uk/Chapter4.pdf

Just don't give up.

"The choices you make might be mistakes but it's never too late to turn around." Tony Lang-musician