Rotating Magnetic Field's and Inductors.

[Dog-One]

I can respectfully agree to disagree.  But I do have one more question.  If the magnets are only pushed against and don't return the push then why can't we just use something else to be pushed against?

Carroll

I tend to agree Carroll.  Why go to all the trouble of magnetizing a permanent magnet when the armature could just pull against a dead piece of steel or iron.  I think I know why--because that kind of motor would be a piece of trash with poor torque characteristics and high power demand.  In other words, unusable as a convertor of electrical energy into mechanical force or rotation.  As noted by Don Smith, it would spend a lot of energy just churning up the Aether.

[gotoluc]

Let's have some fun and put this to bed. You up for a challenge Brad?

I challenge you to an efficiency battle using only flyback from a coil. You stick with your iron core coil and rotor of magnets, and I'll use whatever coil I choose, but with no rotor, and no resonant tank. What do you say?

Let me know if you're up for it, then we can agree on some goals for the challenge.

I don't see the fun in this challenge!

You could achieve 95 to 97% of your input from flyback with those conditions.
How could this be fair if you tell Brad what he has to use and you can chose what ever you wish?

Don't go for it Brad... unless you fire up your RT v3

Luc

[Jimboot]

Jimboot
Looking at your pic's,and the twist direction of the string,the magnets in your video were spinning in the correct direction to untwist the string.

Nope - the string definitely wound up not down. That is why I posted the photo of the string after the run. Quite clearly it had wound up.

[/size]One easy way to verify what is going on,is to lower your spinning magnets so as they are about 1mm of the floor. Then let the magnets spin. If the magnets touch the floor after some time of spinning,then you know the string was unwinding,and getting longer.

Brad

Or I could see the string not wound up before the test and definitely wound up after. When you release it after it has run it UN ravels.


edit: Ok just did the measurement test. The string was definitely winding up placing tension on itself then it began to drop. I examined the string and it was falling apart and had deteriorated to just a couple of strands. So the tension on the string is not in doubt for me and the end of a spin. Maybe the breaking string came first which triggered the spin? Not sure but I will do more tests. Most definitely not an unwinding string though.

[hoptoad]

I can respectfully agree to disagree.  But I do have one more question.  If the magnets are only pushed against and don't return the push then why can't we just use something else to be pushed against?

Carroll

Because the nature of the 'pusher' dictates the nature of the push (or pull), and thus also determines the nature of materials used in the construction of both pusher/puller and pushed/pulled.

In any current driven DC or AC motor, electricity is the pusher. Utilizing the magnetism that's produced by the electricity is merely one method which allows pushing (or pulling) without physical contact.

Static driven motors operate using the electric field not the magnetic field. Neither electromagnets or permanent magnets are needed for them to operate. But you still need electricity.

Permanent magnets in a DC motor are the electromechanical equivalent of a chemical catalyst, improving the performance of the motor but not actually contributing energy directly in any way. Instead, they improve performance and reduce the input energy required by helping to provide better electromechanical characteristics than would be the case without them.

They can help save energy and they can assist in the translation of energy during a device's operation, but they cannot produce energy.

Cheers.

[tinman]

Let's say you are right Brad, that the apparent inductance increases momentarily. I believe that it is possible, and I posted to that effect. Let's say we are both correct, and both are happening at the same time.

Now what? What are you going to do with this information? What is the purpose of all this to begin with? If the purpose is simply to make the most efficient IK power source, then see below.

You up for my challenge? Here is is again:

Let's have some fun and put this to bed. You up for a challenge Brad?

I challenge you to an efficiency battle using only flyback from a coil. You stick with your iron core coil and rotor of magnets, and I'll use whatever coil I choose, but with no rotor, and no resonant tank. What do you say?

Let me know if you're up for it, then we can agree on some goals for the challenge.

Sure-you know me-I never back down from a challenge.

But first you must finnish the challenge you have already voluntarily half completed--> and that is to get your simulated setup to replicate my results from my DUT. That is-to get the output current-power to increase when the input current-power is decreased.
Once you have answered and completed that challenge you put upon your self, then we can set the ! Apples for Apples! parameters for the next challenge.

You will of course be required to build an actual device for the next challenge-as I do. And you will be required to post a video here on this thread of your device under test, and the results obtained from that test during the video--> as I do.

So yes, im up for the challenge as long as we are on equal ground.


Brad.