AC voltage from single magnetic pole

[partzman]

Sorry to read that. Is it an ischemic stroke ?


This thread will be fine without your input for a while. There are other experimenters that join in.

Actually we just got the news that he didn't have a stroke a all according to the MRI but since he has epilepsy, they think he had a seizure either during or after the procedure which was a TFNA or TFN-ADVANCED™ Proximal Femoral Nailing System to fix his hip.  If true, then he is exhibiting Todd's Paralysis which mimics a stroke but are only temporary 'normally'.  He had all the classic stroke symptoms like left leg and arm weakness, slurred speech, drooping face, and difficulty swallowing, so we'll know more in the next 24-48 hours or so. 

Regards,
Pm

[nix85]

I'd like sc expert's opinion, if you got him bring him...

But for now address the last post.

[verpies]

Now that we are clear that your claim is for resistive coils too...

An external varying field perfectly includes varying field from an electromagnet, there is no sense to limit it to moving magnet.

Yes

And what then, if you insist on aircores, what is the difference between what you claim and a transformer in which core is removed from the secondary.
Primary produces time varying flux just like moving PM does, and we got an aircore secondary.

There is not much difference. The only one I would be worrying about is capacitive coupling at high frequencies between the primary and secondary, such as when one is wound over the other.

So you are claiming current in this secondary will not lag voltage even when inductance and frequency are high?

That question is ambiguous so I will have to add more details to it, like this:

So you are claiming current induced in this secondary will not lag the voltage induced in this secondary even when inductance and frequency are high and secondary's self-capacitance is relatively low (or zero) and the only coupling between the primary and secondary is magnetic?

If you ask it like above then my answer is "yes"

Notice, that in such experiment the primary is only a source of varying magnetic flux and there is not access to electric signals in the primary. 
This means that you are not allowed to have any knowledge of electric signals in the primary, e.g. you are not allowed to place any electric probes in the primary circuit.

That would be completely wrong.

Why?

[nix85]

Why?

For simple reason that current cannot instantly start through any inductor, this is known as

τ = L/R inductor time constant, after ~5τ (transient time) current reaches 99.5%

Therefore inductor with big inductance and low resistance especially at higher frequencies will have significant IV phase shift no matter how you induce it.

[verpies]

For simple reason that current cannot instantly start through any inductor, this is known as
τ = L/R inductor time constant, after ~5τ (transient time) current reaches 99.5%
Therefore inductor with big inductance and low resistance especially at higher frequencies will have significant IV phase shift.

This is correct but only when that current is a consequence of applying an external voltage to that inductor.
We are not talking about that scenario.