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Author Topic: Homopolar generator idea  (Read 11420 times)

Offline seaad

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Re: Homopolar generator idea
« Reply #30 on: March 13, 2019, 12:13:51 AM »
An AC variant.

Offline seaad

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Re: Homopolar generator idea
« Reply #31 on: March 23, 2019, 02:26:29 PM »
A new suggestion.

Offline F6FLT

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Re: Homopolar generator idea
« Reply #32 on: March 23, 2019, 05:52:58 PM »
A new suggestion.

It will work, 100% sure (I presume the magnets present opposite poles).
A probably more efficient method is to remove the central wheel and use two counter-rotating disk-magnets touching each other by their rims and having same poles. I wrote "probably" because their weak point is that they repel each other.

Offline seaad

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Re: Homopolar generator idea
« Reply #33 on: March 23, 2019, 07:17:52 PM »
Yes this was my first thought also but the magnets polarity [your way] makes it near impossible to make them touch each other, because they repeal themselves extremely strongly sideways and radially.
If we force them to touch each other, I presume that the braking action in the axis bearings will be  greater than as in my suggestion above.
I wanted to avoid a build with these hateful brushes at the rim.

Regards Arne
« Last Edit: March 23, 2019, 10:33:09 PM by seaad »

Offline F6FLT

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Re: Homopolar generator idea
« Reply #34 on: March 24, 2019, 10:57:10 AM »
Hi Arne,

The repulsion will not result in a slowdown, because it is not a torque that is applied against rotation. We have a linear force in the plane of the magnets, and if it is not perfectly balanced, which will certainly happen, there will be also a torque tending to rotate the plane of the discs. A solid mechanical system can solve the problem. An easy way would be to fix the magnets in front of rotating conductive discs and only the discs rotate.
The possible demagnetization of opposing magnets may remain a problem.
With intermediate wheels, we increase mechanical losses, and electrical losses since we increase the number of contacts, so not sure if the method is better. I don't think so.

Offline Azufrito

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Re: Homopolar generator idea
« Reply #35 on: March 24, 2019, 11:38:11 AM »

Offline F6FLT

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Re: Homopolar generator idea
« Reply #36 on: March 24, 2019, 12:16:21 PM »
https://www.youtube.com/watch?v=n7x-6J-V_EQ

Nice setup. The idea of the conductive chain for the mechanical coupling of the discs is excellent, it avoids the problem of repulsion of the magnets by allowing them to be moved away.
However, I wonder why the voltage is so low.

Offline F6FLT

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Re: Homopolar generator idea
« Reply #37 on: March 25, 2019, 02:50:48 PM »
.

Offline shylo

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Re: Homopolar generator idea
« Reply #38 on: March 26, 2019, 02:05:12 AM »
The constriction of the gears and chain locks the magnetic field.
The field changes as rpm increases or changes.
It all balance's   that's why ou is not possible.
Use the balance to your advantage, throw it out of balance.
Use the offset,

Just what I'm trying.
artv

Offline Azufrito

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Re: Homopolar generator idea
« Reply #39 on: April 02, 2019, 12:12:08 PM »

Offline seaad

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Re: Homopolar generator idea
« Reply #40 on: April 08, 2019, 12:08:32 PM »
AC

Offline broli

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Re: Homopolar generator idea
« Reply #41 on: April 08, 2019, 01:19:29 PM »
AC


It's still a homopolar motor/generator with counter torque acting on it. And the advantage of AC is overrated if you are not extracting a ton of current.



But if you want something new, put the axle brush on the opposite side of the rim instead, leave the magnet stationary and only spin the ring around the rim of this split pole magnet.