Thane Heins Perepiteia Replications

[Nali2001]

Animations:
So in this one, voltage is climbing on approach
http://www.koehler.me.uk/animation/e_and_m_magnets.htm

But:
In this one voltage is highest when magnets are out of alignment
http://www.koehler.me.uk/animation/e_and_m_ac_gen_1.htm

hmmm

[TinselKoala]

So a wheel with opposite polarity magnets will give you 'M' shaped waves instead of ac.

Or even weirder, depending sensitively where you have the sense coil located.

[i_ron]

Animations:
So in this one, voltage is climbing on approach
http://www.koehler.me.uk/animation/e_and_m_magnets.htm

But:
In this one voltage is highest when magnets are out of alignment
http://www.koehler.me.uk/animation/e_and_m_ac_gen_1.htm

hmmm

The first one is the one 'we' are talking about and is shown correctly.

The second one is not. It is similar to Thane's single loop rotating in a constant flux field, and both are comparing apples and oranges.

Ron

Ron

[TinselKoala]

Isn't it current that creates the magnetic field?

Another question I have is; is there any coil winding configurations that are better than others as far as delaying the current yet provide for a strong reactive field? Since high voltage coils do the trick they generally are higher in
impedance.

Take care.

nap

Current creates the magnetic field, yes.
But you need voltage, to create the current. Voltage is the ability to overcome resistance, by passing a current.  Induction produces voltage, which makes the current flow (in a circuit, if there is one). You can have voltage without current, but you can't have current without a voltage (except in superconductors, and even then you don't get it for free.)
Current is "delayed" in a coil to the extent that it sets up a magnetic field. That is, the more the induction of the coil, the more the (changing) current is delayed.

[TinselKoala]

The first one is the one 'we' are talking about and is shown correctly.

The second one is not. It is similar to Thane's single loop rotating in a constant flux field, and both are comparing apples and oranges.

Ron

Ron

Umm. No, I don't think so. As the explanation of the animation shows, because of the geometry of the pole pieces, when the magnet armature is aligned vertically with the stator poles, the field actually is NOT changing. So the voltage is zero here. When the armature is horizontal, the magnet poles are in the gap of the stator poles and so the field changes rapidly here--even flips polarity--thus the voltage is maximum.
Faraday rules!