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### Author Topic: Replacing sticky spots with dead spots.  (Read 3381 times)

#### Low-Q

• Hero Member
• Posts: 2847
##### Replacing sticky spots with dead spots.
« on: September 14, 2017, 12:03:16 PM »
Hi all,

I've in the middle of making a new test - for learning purpose ofcourse.

The new test is described as follows:

Then you have two magnets facing eachother with attraction S to N, but keep a proper space between them, a third magnet approach these two from the side, and towards the gap between the two.
If the third magnet is polarized the same direction, it first repels, then when it is close enough it starts to attract.
The other way, the third magnet will first attract, then start to repel when it is close enough.
This means that the concept repels or attracts depending on distance.

So I'm making a wheel with an array of magnets along the circumference, with polarity in the direction of the wheels axis.
One half has opposite polarization.
The hub of this wheel is eccentrical, meaning the wheel will wobble as it spins.

Surrounding this wheel, there is a stator consisting of a circle of magnets that is polarized in the direction of the axis, with same polarity through the whole circumference.

One side of the wheel, will at all times be closer, and just close enough to neither attract nor repel the stator.
The other side of the wheel will be far enough to repel on one side and attract the other side (The concept - not sure if it is so in real life)

What I want to learn, is how the behaviour is, and why the wheel possibly cannot start automatic rotation by itself. Accdording to modern physics, conservation of energy must be obeyed, right?.

I will post pics and finished product when it's done.

Vidar

#### Low-Q

• Hero Member
• Posts: 2847
##### Re: Replacing sticky spots with dead spots.
« Reply #1 on: September 14, 2017, 03:04:18 PM »
Here are some drawings.

The eccentric rotor have two layers of magnets which is separated and somewhat located on each side of the outer stator.
Just by looking at this drawing, I can probably confirm where the problem is. I question how the outer ring possibly can "feel" any torque from the eccentric rotor.
Any possible torque cannot only be "felt" by one part, but both.

Vidar

#### Low-Q

• Hero Member
• Posts: 2847
##### Re: Replacing sticky spots with dead spots.
« Reply #2 on: September 14, 2017, 11:09:09 PM »
The building process

#### Low-Q

• Hero Member
• Posts: 2847
##### Re: Replacing sticky spots with dead spots.
« Reply #3 on: September 14, 2017, 11:12:27 PM »
First a hand held stator. All magnets will be polarized through thickness, an all in the same direction.

#### profitis

• Hero Member
• Posts: 3952
##### Re: Replacing sticky spots with dead spots.
« Reply #4 on: September 15, 2017, 10:41:22 AM »
"Just by looking at this drawing, I can probably
confirm where the problem is."

You musnt forget the fields outside the ring.they do play a roll too

#### Low-Q

• Hero Member
• Posts: 2847
##### Re: Replacing sticky spots with dead spots.
« Reply #5 on: September 15, 2017, 08:32:17 PM »
"Just by looking at this drawing, I can probably
confirm where the problem is."

You musnt forget the fields outside the ring.they do play a roll too
Yup. Not only that. Even if the upper side attract and lower side repels (they do), the same forces at the very closest also want to countertorque.

I made this hand held stator. I felt that the rotor didn't have torque around the hub, but the hub felt to be bore like the circumference of a "virtual" hub closer to the most narrow gap between rotor and stator - somewhere between the physical hub and the narrow gap.

Anyway, the rotor did not spin. I expected that, but built it to learn why not.

Vidar