Thane Heins Perepiteia.

[i_ron]

In dog we trust

Today is dog worship day in Nepal

[Kator01]

Hello Thane,

well I was pondering on this picture and your explanation... and it is not quite clear for me now.

Two questions :

1) Are the to coils switched in parallell,  in series or shunted seperatly ?
2) What would be the position of the following magnet ?

Let us assume you just have this one magnet on your driver-plate.
If the magnet passes HC-Coil 1 on the left and then leaves to arrive in the middle position there is just one Back - EMF-Fluxpath ( blue arrows ) because HC-coil 2 was not energized yet.

This is the reason for question 1)

To ponder furtheron ( now we have to be very precise on this ) :

There is a difference between Back-EMF and and Reactive-EMF ( which occures when the magnet leaves the HC-Coil 1 -position) as these two phaenomea happen at two different phases ( in time)
While the magnet energizes Coil 1 which is shunted ( 10 Ohm) back-EMF appears the very moment current starts to rise in the coil . At this moment the magnet has not left for the middle position.
This Back-EMF can not be avoided under standard-conditions. There must be a drag on magnet 1 while it is in alignement with coil1.But what about the reactive-EMF which is caused when the magentic-energy stored in the coil and the core collapses upon the leaving of the magnet ?
There is something different going on.
My understanding : The drag is compensated in the next phase ( middle to hc-coil2 - position)
This would explain why there is no accelleration and no decelleration.

Question 2) relates to the future design . How many magnet-arrarys will be possible ?

Regards

Kator01

@thane : nice ( god )-dogs. Have they arrived in your backyard already ?

[broli]

Kator I'm on the same boat. Typical Lenz is being violated badly. I have no clue what is happening in that core or coil. But a scope shot which also points out TDC would explain at least what the HV coil is doing.

[i_ron]

Hello Thane,

Let us assume you just have this one magnet on your driver-plate.
If the magnet passes HC-Coil 1 on the left and then leaves to arrive in the middle position there is just one Back - EMF-Fluxpath ( blue arrows ) because HC-coil 2 was not energized yet.

Regards

Kator01

I was waiting for T to answer... but ....

Looking at his drawing, if you imagine the motion of the magnet TOWARDS YOU (his masters
voice) NOT SIDE TO SIDE, then it becomes clearer, or should, the two outside legs are always
just the flux return path. As the center core is centering over the magnet the flux is diverted to
each of the outside cores and returned though the backing plate... in each case the counter
EMF finds it's path through the opposite side core and not through the saturated center core.

The single magnet does not transverse the outside cores (legs), only the center core..

I trust this has been of some help?

Ron

[sparks]

      Current does not flow instantaneously in a coil of high impedance.  You make that coil with enough turns and the current could flow up to a second later.  Electrons got inertia.