Magnetic Flywheel: Can It Achieve Higher Rpm?

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Discussion Overview

The discussion revolves around the concept of a magnetic flywheel and its potential to achieve higher rotational speeds (RPM) through interactions with smaller bodies or additional magnetic elements. Participants explore theoretical scenarios involving magnetic attraction, acceleration, and the dynamics of rotating bodies, with a focus on both conceptual and experimental aspects.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether a smaller body attracted to a magnetic flywheel can achieve a speed greater than the flywheel's RPM, suggesting the need for additional energy to facilitate this.
  • Another participant proposes the idea of using a second magnetically-coupled disk that could potentially spin at a higher angular velocity, although they express uncertainty about the startup process for this disk.
  • A different perspective involves a scenario where a larger flywheel with multiple magnetic poles interacts with a smaller flywheel, potentially allowing the smaller one to maintain a higher angular velocity if properly aligned.
  • One participant introduces a hypothetical situation involving a spinning disk in space with rare Earth magnets attracting an incoming iron asteroid, questioning if the asteroid could achieve escape velocity after being captured by the magnetic field.
  • Another participant mentions the concept of a slingshot effect, suggesting it might allow the asteroid to gain speed beyond its initial velocity.
  • A participant notes that if the flywheel's bearings are magnetic and static, they would not affect the rotation of another body, raising doubts about the feasibility of the initial premise.
  • One participant shares their personal project involving a magnetic flywheel, expressing a desire to understand the optimal RPM for generating electricity, despite acknowledging their limited knowledge of physics.

Areas of Agreement / Disagreement

Participants express a range of ideas and hypotheses, with no clear consensus on the feasibility of achieving higher RPMs through the discussed methods. Multiple competing views and uncertainties remain regarding the mechanics involved.

Contextual Notes

Some limitations include the unclear definitions of terms like "escape velocity" in the context of magnetic interactions, as well as the assumptions about the behavior of magnetic fields and rotational dynamics in the proposed scenarios.

Who May Find This Useful

This discussion may be of interest to individuals exploring concepts in magnetism, rotational dynamics, and energy generation, particularly those involved in experimental physics or engineering projects related to magnetic systems.

wolram
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This is a poorly posed question but i do not know another way to ask so,
a magnetic flywheel is rotating at X rpm, a weakly attracted much smaller
body is attracted to the flywheel, at some point in the smaller bodier decent
to the flywheel, can it be given some acceleration that will take it beyond
the flywheels rpm?
 
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As long as one is able to apply additional energy in some fashion to the "smaller body" in such a way as to incite further acceleration, sure, it's possible.
But I'm not sure from your description as to what you would hope to gain from this that could not be done more simply. Could you elaborate?
 
Seems like you could get another magnetically-coupled disk to spin at twice the angular velocity or more. Certainly steady state you could, as long as the magnetic pulses lined up. I'm not sure about how best to create the startup transient for the 2nd disk though...
 
Can you elaborate berkeman, it does not matter about the secondary spin rate, as long as it is higher than the primary.
 
I guess I'm picturing something like a main flywheel with 4 magnetic poles per rotation, and a smaller flywheel with 2 poles per rotation. If the small one initially has 2x the angular velocity of the large one, and the poles are lined up to give a positive push from the large one to the small one each time the poles pass, then the small one will be stable at 2x the angular velocity of the large one. Seems like that would work. It's the initial spin-up part that I have trouble thinking of tricks to accomplish so far...
 
May be if the primary attractor had a mulltitude of poles, and secondary
had been (spun up) by an outer influence.? thanks for your help it is welcome.
 
um i don't quite know what you were thinking of, but i have a vision. lol
ok so let's be in space. we have a disk that is big.. no need to be specific.
on this disk there are 4 mountains of rare Earth at 4 corners. it is spining perfectly like a wheel apon an axis. a asteroid of iron is incoming on a path that will just miss the edge of the disk. the iron is attracted to the magnetic rare earth, so it changes the path that the astroid was on. the astroid instead, starts to circle arroud the disk and balance the magnetic pull with its inertia. could the astroid develope an escape velocity that is greater than its entrance velocity?
 
skeletonic said:
um i don't quite know what you were thinking of, but i have a vision. lol
ok so let's be in space. we have a disk that is big.. no need to be specific.
on this disk there are 4 mountains of rare Earth at 4 corners. it is spining perfectly like a wheel apon an axis. a asteroid of iron is incoming on a path that will just miss the edge of the disk. the iron is attracted to the magnetic rare earth, so it changes the path that the astroid was on. the astroid instead, starts to circle arroud the disk and balance the magnetic pull with its inertia. could the astroid develope an escape velocity that is greater than its entrance velocity?
If the asteroid is (captured) by the magnetic disc then no, but what about
the sling shot effect used by satalites.
 
wolram said:
This is a poorly posed question but i do not know another way to ask so,
a magnetic flywheel is rotating at X rpm, a weakly attracted much smaller
body is attracted to the flywheel, at some point in the smaller bodier decent
to the flywheel, can it be given some acceleration that will take it beyond
the flywheels rpm?

Only the bearings are magnetic and have no spin, they are static as to rotation and the wheel is not magnetic. so there would be no effect on another body. At least none to make it spin.
 
  • #10
i know this is an old dead topic (its amazing what you can find on google) but maybe my posting will bring it to everyone's attention this kinda pertains to something i am working on. please note i have no idea about physics just a nagging dream about this thing with a motor and magnates so i figure with the blue prints in my head, build it and find out the messed up parts is it changes as i learn more about what i am doing upgrading just a little like adding a braking system based on heat and on manual shut off for control purposes... yeah I'm insane but aren't we all a little insane besides if it helps the world who cares about me

anywho what would the X RPMs of a magnetic flywheel be to get optimum Amps and Volts?
 

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