- #1
carmatic
- 92
- 1
hey all, i recently had an idea to combine the concepts of a magnetic bearing i.e. using the repulsion of magnets to lift a rotating object so that the object may rotate without mechanical friction , as well as an axial-flux alternator where coils of wire are exposed to a regularly fluctuating magnetic field by means of magnets placed on a rotor
here is the rotor in question
[PLAIN]http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/229398_10150244084286197_502061196_8553060_8301136_n.jpg
the outer magnets are all aligned the same way, and the inner magnets are all aligned the opposite way, and the 'star' is made of mild steel which acts as the magnetically permeable material, and thus the flux flows from one magnet to the next, and the effect should be somewhat similar to a 'horseshoe' magnet which zig zags around a circle ... the 'magnet face' of the star can lift a steel tool from several inches away, while the 'back face' can barely lift a nail
this is my base
[PLAIN]http://a1.sphotos.ak.fbcdn.net/hphotos-ak-ash4/230863_10150238874781197_502061196_8521409_4059347_n.jpg
the inner magnets are also all aligned in the opposite way to the outer magnets, and the large disc is also made of magnetically permeable material... but here, the magnets are supposed to give as uniform a magnetic field as possible, ideally this should have been 2 large concentric ring-shaped magnets , instead of rings of smaller magnets... the magnetic field should approximate a half torus
this is the magnetic levitation in action
[PLAIN]http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/227164_10150238940691197_502061196_8522030_4748995_n.jpg
the rotor is being held up by the repulsion of the magnets... at least mechanically, the magnetic field of the base is uniform enough for the rotor to spin without any 'bumps' or 'dips'... in actual use, the rotor would be loaded down and the gap between it and the base would be less
thus, it is working as a magnetic bearing, allowing rotation without mechanical friction
however, the actual purpose of the star-shaped arrangement of the rotor magnets is to cause a regularly fluctuating magnetic field, somewhat like an axial flux alternator... the rotor magnets should distort the half torus magnetic field of the base into a 6-sided star shape, and as the star rotates, stationary points along the path of the magnets should experience a fluctuating magnetic field
and in order to generate electricity from this magnetic field fluctuation, i have wound these coils:
[PLAIN]http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc6/247457_10150260392966197_502061196_8700451_7381166_n.jpg
there are 3 coils for every magnet, thin enough to fit in the lift gap, and they are glued onto a piece of paper printed with a template of the positions, so while their positioning isn't exactly perfect, they should be within a tolerable margin of error, and all the magnets should pass over a coil pretty much simultaneously ... and all the coils which do simultaneously have a magnet over them are wired in series, the inner coils are wound in the opposite direction from the outer coils
and thus, this creates 3 separate circuits of twelve coils each... one end of each circuit is joined together while the other is exposed to be connected to the electrical systems receiving the electricity output , hence this should be a 3 phase alternator, with 6 cycles for every revolution of the rotor
the problem is that this doesn't actually generate any voltage when i spin the rotor ... i am thinking that the magnetic field from the base magnets are 'shielding' the coils from the rotor magnets... where the rotor magnets arent causing enough of a perturbation in the magnetic environment of the coils to produce a measurable voltage
my idea for correcting this is to get nails which have the same length as the thickness of the coils, and with a flared butt end ... the nails would be glued in with the butt end facing upwards (in order to catch as much flux from the rotor magnets as possible) and the pointy ends downwards (to present as little ferromagnetic material in close proximity to the base magnets as possible), and so these nails will act as cores for the coils, concentrating the flux from the rotor magnets into the coils... i will lose abit of lifting force due to the rotor magnets being drawn towards the nails and risk the rotor magnets colliding with the coils, but i can always stack more magnets on the rotor to compensate with an increased amount of magnetic repulsion
does my idea have a sound physical basis? or should i just scrap everything...
here is the rotor in question
[PLAIN]http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/229398_10150244084286197_502061196_8553060_8301136_n.jpg
the outer magnets are all aligned the same way, and the inner magnets are all aligned the opposite way, and the 'star' is made of mild steel which acts as the magnetically permeable material, and thus the flux flows from one magnet to the next, and the effect should be somewhat similar to a 'horseshoe' magnet which zig zags around a circle ... the 'magnet face' of the star can lift a steel tool from several inches away, while the 'back face' can barely lift a nail
this is my base
[PLAIN]http://a1.sphotos.ak.fbcdn.net/hphotos-ak-ash4/230863_10150238874781197_502061196_8521409_4059347_n.jpg
the inner magnets are also all aligned in the opposite way to the outer magnets, and the large disc is also made of magnetically permeable material... but here, the magnets are supposed to give as uniform a magnetic field as possible, ideally this should have been 2 large concentric ring-shaped magnets , instead of rings of smaller magnets... the magnetic field should approximate a half torus
this is the magnetic levitation in action
[PLAIN]http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/227164_10150238940691197_502061196_8522030_4748995_n.jpg
the rotor is being held up by the repulsion of the magnets... at least mechanically, the magnetic field of the base is uniform enough for the rotor to spin without any 'bumps' or 'dips'... in actual use, the rotor would be loaded down and the gap between it and the base would be less
thus, it is working as a magnetic bearing, allowing rotation without mechanical friction
however, the actual purpose of the star-shaped arrangement of the rotor magnets is to cause a regularly fluctuating magnetic field, somewhat like an axial flux alternator... the rotor magnets should distort the half torus magnetic field of the base into a 6-sided star shape, and as the star rotates, stationary points along the path of the magnets should experience a fluctuating magnetic field
and in order to generate electricity from this magnetic field fluctuation, i have wound these coils:
[PLAIN]http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc6/247457_10150260392966197_502061196_8700451_7381166_n.jpg
there are 3 coils for every magnet, thin enough to fit in the lift gap, and they are glued onto a piece of paper printed with a template of the positions, so while their positioning isn't exactly perfect, they should be within a tolerable margin of error, and all the magnets should pass over a coil pretty much simultaneously ... and all the coils which do simultaneously have a magnet over them are wired in series, the inner coils are wound in the opposite direction from the outer coils
and thus, this creates 3 separate circuits of twelve coils each... one end of each circuit is joined together while the other is exposed to be connected to the electrical systems receiving the electricity output , hence this should be a 3 phase alternator, with 6 cycles for every revolution of the rotor
the problem is that this doesn't actually generate any voltage when i spin the rotor ... i am thinking that the magnetic field from the base magnets are 'shielding' the coils from the rotor magnets... where the rotor magnets arent causing enough of a perturbation in the magnetic environment of the coils to produce a measurable voltage
my idea for correcting this is to get nails which have the same length as the thickness of the coils, and with a flared butt end ... the nails would be glued in with the butt end facing upwards (in order to catch as much flux from the rotor magnets as possible) and the pointy ends downwards (to present as little ferromagnetic material in close proximity to the base magnets as possible), and so these nails will act as cores for the coils, concentrating the flux from the rotor magnets into the coils... i will lose abit of lifting force due to the rotor magnets being drawn towards the nails and risk the rotor magnets colliding with the coils, but i can always stack more magnets on the rotor to compensate with an increased amount of magnetic repulsion
does my idea have a sound physical basis? or should i just scrap everything...
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