Mostly Permanent Magnet Motor with minimal Input Power

[Magluvin]

Nice vid iron

Consider this....

When the coil is energized, the windings in each leg of the rectangle, all the fields from each wire form a collaboration and circle around the outside of each whole leg.

If you are facing the hall sensor toward the leg, then think about where on that surface of that leg is the field seeing more N, and the other, more south, considering the circular path of the field around the leg. When the sensor is in the middle of the face of a leg of the coil, the field orientation is crossing the sensor from top to bottom, not through the face of the sensor. So no field detected because of improper orientation of the sensor at that point. The field is there, the sensor is not positioned correctly.

Here is a test to clear that up....

Put your sensor 'top' on the face of the coil. Say the coil lays flat as you have shown and make sure the sensor is facing across the windings, not with the length. Just as in your vid but top of sensor on the coil You will have the most field strength where you had little to none as in your vid. If the coil were wound round where the leg of the coil is not square, if you try the new test, dragging the sensor around the leg, you will have pretty much the same field strength all the way around the leg.  More on the interior, due to more field density because all legs of the coil contribute to the center opening of the coil as a whole.

If you need a diagram, I can put something together for better understanding.

Mags

[poynt99]

OK-some one please explain to me as to why the magnetic field is opposite on the inside of the coil,as aposed to the outside of the coil,when all wire is wound in the same direction,and current flow is uniform.\

https://www.youtube.com/watch?v=IvfwELDmKIM

Guys, guys, guys, you seem so fixated on this "Boch Wall" notion. 

There is no Bloch Wall in standard magnet configurations, nor coils. When you see a "null" in the measured B field, it is because there is a "zero-sum" result of the net flux being sensed by your measuring device, be it a compass or Hall device.

Bloch Walls occur when there are two adjacent domains magnetized in opposite directions. So this is reserved in cases where a block of magnetic material is magnetized in more than one direction in different sections.

Look at the attached diagram of a solenoid and the flux lines shown "flowing" around it. As you move your eye from the center towards the outside, you notice that the direction of the flux changes 180º. Somewhere in this transition area, the amount of upward flux is equal to the downward flux, and if your sensing device was placed there it would measure 0 flux.

Now it should also be clear as to why the polarity is opposite when measuring inside the coil compared to the outside of the coil (or magnet).

[gotoluc]

Hi poynt

thanks for your post.

The term Bloch wall, I thought it meant the Neutral point between two magnetic poles and that's what I was using the word as.
If that is not correct, then I have no problem calling it the Poles Neutral Zone if that's a better way to describe it.

In the illustration of the solenoid magnetic field you posted, we can see -> arrows going in different directions. Do these arrows represent a pole direction?

I assume the the fine black rectangle line is the outside of the solenoid coil?... is that correct?

Luc

[lancaIV]

About pole direction there is another phaenomen :the Hallbach array direction
http://www.geminielectricmotor.com/A%20Solution%20for%20the%20Future.htm


New,for me, something called "Ronbach array" from an inventor named Sankar Pat ( Pathamadai).
http://radaris.com/p/Pat/Sankar/
http://www.google.com.ar/patents/US20110241349

Compared with the use of the traditional magnet, the improvement in EMF 8 as well as the torque generated by the electromagnetic generator/motor 1 is given by (3^n/2).
Referring next to FIG. 2 of the drawings, a schematic diagram a single phase electromagnetic generator/motor having three pairs of permanent magnets 3 a-3 c and 4 a-4 c, respectively, and three coils 2 a-2 c in a Ronbach array is generally indicated by reference numeral 1 a. The magnets 3 a-3 c may each have a dominant north pole whereas the magnets 4 a-4 cmay each have a dominant south pole. The improvement in EMF and torque generated by the electromagnetic generator/motor 1 a is given by 3^(n+1)/2.

TABLE I
Increase in Torque as well as EMF for Ronbach
Generators/Motors (theoretically predicted maximum values)
No.	TRF = VRF = (3n/2)	TR3F = VR3F = (3) * (3n/2)
1	1.73 for n = 1	5.19 for n = 1 and m = 3
	(73% increase)	(419% increase)
2	3.0 for n = 2	9.0 for n = 2 and m = 3
	(200% increase)	(800% increase)
3	5.2 for n = 3	15.60 for n = 3 and m = 3
	(420% increase)	(1460% increase)

As illustrated in Table I (above), the Ronbach magnetic array of both the electromagnetic generator/motor 1 (FIG. 1) and the electromagnetic generator/motor 1 a (FIG. 1A) improve the output of EMF 8 and torque significantly over conventional single-magnet arrays.




Sincerely
              OCWL

[poynt99]

Hi poynt

thanks for your post.

The term Bloch wall, I thought it meant the Neutral point between two magnetic poles and that's what I was using the word as.
If that is not correct, then I have no problem calling it the Poles Neutral Zone if that's a better way to describe it.

There are no neutral zones between the poles. "Poles" is actually somewhat poor terminology. Poles really only tells you what direction (by standard convention) the main central flux is going. Also causing confusion is the way magnets are illustrated with one half being blue and one half being red. This leads us to believe that there is no field (or that there is a "Bloch wall") right in the middle where the color changes. This is simply incorrect. Magnets really should be illustrated with one solid color and a single arrow from one end to the other.

In the illustration of the solenoid magnetic field you posted, we can see -> arrows going in different directions. Do these arrows represent a pole direction?

All magnets and solenoids have a magnetized direction (permanent magnets by how they were magnetized, and solenoids by the direction of current). In the illustration, that magnetized direction is in the center (centre if you are Canadian) of the solenoid, so bottom to top. Magnets and solenoids have "curl". The flux lines curl back to the "x" of the arrow and exit out the "." of the arrow. Notice that there is no neutral zone in the middle of the arrows?

The "poles" if you will are vertical, not horizontal in this illustration. So going from the centre towards the outside, you do sort of hit a pseudo neutral zone because at some point the main flux and curled flux levels will be equal and will cancel inside your measuring instrument giving you a reading of "0".

I assume the the fine black rectangle line is the outside of the solenoid coil?... is that correct?

Luc

Correct.