Transformer Induction

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Magluvin

Re: Transformer Induction « Reply #350 on: 2026-08-01, 04:40:27 »

Group: Mad Scientist
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oops.. 12turn. i see it now

so it pulled toward the primary....

firstly, to understand more is, lets say that maybe the wire 'was' pulled in to the primary by magnetic interaction.

if we hung 2 wires losely and horizontally instead. quarter in between them. if we power both wires, same polarity, if there is movement of the wires in reference to each other, the movement should be opposite of just powering 1 of those wires and loop shorting the other. the loop shorting example should be the same as your example. by the way, thanks for doing that.

simple stuff. like i said, will do some of these simple things this weekend. trying to figure out why i cant log in to my magluvin youtube channel.

mags

partzman

Re: Transformer Induction « Reply #351 on: 2026-08-01, 15:51:20 »

Group: Experimentalist
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Posts: 2307

Quote from: Verpies on 2026-07-31, 22:44:59

Primary ?! No, we are talking about "induced" current in a wire so this implies "secondary". There is a fundamental difference between the "inducing" and the "induced" circuit.
The resistance of the primary (the winding that generates the main magnetic flux in the core and leakage flux in its hole) is not relevant to this discussion.

PM stated- "So, the current in the primary will not change polarity but will simply rise to a peak and then return to zero."

Your reply- "That's right but only below some L/R ratio vs. risetime and always when the resistance of the circuit is zero.
For an electric current to flow along the wire, the wire must be a part of a closed circuit / loop."

Context is everything and here you respond to my comment about the primary's current waveform. Now you say you were referring to a secondary??!??

Also, the primary induces the single wire via the H-Field.

Pm

partzman

Re: Transformer Induction « Reply #352 on: 2026-08-01, 15:55:07 »

Group: Experimentalist
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Posts: 2307

Quote from: Magluvin on 2026-08-01, 04:40:27

oops.. 12turn. i see it now

so it pulled toward the primary....

firstly, to understand more is, lets say that maybe the wire 'was' pulled in to the primary by magnetic interaction.

if we hung 2 wires losely and horizontally instead. quarter in between them. if we power both wires, same polarity, if there is movement of the wires in reference to each other, the movement should be opposite of just powering 1 of those wires and loop shorting the other. the loop shorting example should be the same as your example. by the way, thanks for doing that.

simple stuff. like i said, will do some of these simple things this weekend. trying to figure out why i cant log in to my magluvin youtube channel.

mags

I am not saying the loose wire was pulled to the primary by induction force but rather heat expansion gave it the ability of moving towards the primary.

Pm

Magluvin	Re: Transformer Induction « Reply #353 on: 2026-08-01, 19:41:37 »
Group: Mad Scientist Hero Member Posts: 1241	how can you be sure? other than that, do you conclude that the wire will not move in he core when the primary is active, because it was heat flexing the wire? mags

partzman

Re: Transformer Induction « Reply #354 on: 2026-08-01, 21:05:08 »

Group: Experimentalist
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Posts: 2307

Quote from: Magluvin on 2026-08-01, 19:41:37

how can you be sure? other than that, do you conclude that the wire will not move in he core when the primary is active, because it was heat flexing the wire?

mags

I find no visible movement in the wire that should be caused by forces from the H-Field in the many tests I've run. Either the wire is too stiff, or the forces are too weak, or occur at too high a speed to be visible, or.....? I only see movement when the wire is heated and the direction is easily influenced by the slight bend in the wire. The core can be rotated so the primary is in a different position relative to the wire and the deflection of the wire still remains the same direction.

My conclusion is that I see no deflection in the wire resulting from H-Field forces.

Pm

Verpies

Re: Transformer Induction « Reply #355 on: 2026-08-02, 06:22:29 »

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Posts: 4856

Quote from: partzman on 2026-07-30, 15:34:19

So, the current in the primary will not change polarity but will simply rise to a peak and then return to zero. Therefore, the deflection will be in the same direction for the entire cycle.

Quote from: partzman on 2026-08-01, 15:51:20

Context is everything and here you respond to my comment about the primary's current waveform. Now you say you were referring to a secondary??!??

I was certain that your statement referred to the secondary because it mentioned a "deflection". I answered about the current induced in the secondary because I thought that is where the "deflection" took place.
My answer is not applicable to the primary current.

I will not provide a reply about the current induced in the primary because the current in the primary can be anything that the power supply (i.e. bridge) pushes into it.

partzman

Re: Transformer Induction « Reply #356 on: 2026-08-02, 16:07:01 »

Group: Experimentalist
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Posts: 2307

Quote from: Verpies on 2026-08-02, 06:22:29

I was certain that your statement referred to the secondary because it mentioned a "deflection". I answered about the current induced in the secondary because I thought that is where the "deflection" took place.
My answer is not applicable to the primary current.

I will not provide a reply about the current induced in the primary because the current in the primary can be anything that the power supply (i.e. bridge) pushes into it.

OK, I understand your explanation above.

Thank you.

Pm

Magluvin	Re: Transformer Induction « Reply #357 on: 2026-08-02, 18:40:29 »
Group: Mad Scientist Hero Member Posts: 1241	thats fair. if it didnt move, but it seems like it should have, what do you think is happening here vs 2 hanging wires close to one another as described earlier. have a vid. https://m.youtube.com/watch?v=1JZLKvWO0ks im at home. its raining cats and electrons. see if i can get to my shop to do some things later. mags