Negative Inductance and measure of Magnetic force.

[synchro1]

There's a difference between neutralization of opposite polarities and neutralization of attraction. The short video above could be repeated with the holding power generated by the electro-magnet, releasing the ceramic block when the coil power's interrupted. It would waste a lot of power to hold the ceramic block magnet up with power from the electro-magnet, instead of it's permanent backing magnets! 

Art Porter demonstrates neutralization of opposition polarity in his GAP video; The repelling magnets close when the neutralization pulse coil is powered on.   

Compare this to the action of a neutralization motor: The attraction rotor magnet is drawn toward the electro-magnet coil when the coil is in output mode from 90 degrees to TDC. Art's gravity piston of opposition magnets is pushed away from the coil when the coil's de-energized.

The difference is that the attraction rotor builds the output from lowest to highest level; The "Push Away" motion of the opposition magnet has it's charge curve reversed! The attraction motor produces a "Rising" power output curve during the rotor magnet's approach to the coil backing magnets during it's recovery mode.

I'll be comparing input and output from my reed commutator attraction motor soon.

Have a look at this attraction output video first; The volt meter's on the milli volt scale:

https://youtu.be/ipxavFNTsh4

[synchro1]

Fast forward to 2:30 for the key to the "Orbo" by JLN: "When you apply current to the stator coil, it's only to free the magnets after they have done useful mechanical work"!

https://www.youtube.com/watch?v=NTMQFvWkS9s

[synchro1]

The electro magnet has very little reach compared to the backing magnet field. The electro magnet could never run the magnet rotor off current alone because the coil field drops off substantially sooner then the inverse square distance of the PM's.

The electro magnet however, has the power to truncate the PM field completely through it's high perm alloy core, when it's directly attached to them. The placement of the PM backing magnets extends the projected field by a wide margin over what the coil could effect alone.

This solitary fact amounts to a powerful amplification of the electro magnet coil force. The wider field range turns into an asset for the electro magnet as a pickup coil because the rotor magnet begins to influence the coil further from the side.

The core inductance acts like weight in copper for magnetic field strength per unit of electrical input power. We get a greater force field per watt value with higher core inductance. Electro magnets are hardly ever used in electrical motors due to these drawbacks; However, the drawbacks turn to advantages when combined with attraction masking of backing magnets.   

[synchro1]

The topic of this thread is "Negative Inductance and Magnetic Force". JLN's first Orbo test demonstrates a drop in ferrite toroid coil inductance from 235 micro Henrys to 167 micro Henrys when the magnets are attached to the toroid by attraction. That's nearly a 30% drop in efficiency; That means it will require 30% more current to unlock the magnets.

The "Electro-Magnet", with a high inductance "Samarium-Nickel-Cobalt" core is practically impervious to inductance loss from the attachment of permanent magnets; Thus millions of times more efficient as a masking magnet shunt then the ferrite. The Electro-Magnet's inductance measured 73 milli Henrys with no magnets, and a loss of one mico Henry with the attachment of the backing magnets and an additional one micro Henry loss with the rotor magnet at TDC. That's two "Millionths" of a Henry. That amount of inductance loss is barely noticeable by contrast to the ferrite!

[synchro1]

Can anyone believe that the same input power is masking ten times the attraction strength?

https://youtu.be/K1aQQhiViig