Thane Heins Perepiteia Replications

[i_ron]

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

The right hand one is correct. But if you understand the coil/core magnet interaction you can follow that ... taking the hypothetical case where the approaching north pole magnet yields a rising sinewave ... the retreating north pole magnet will cause a negative going sinewave...

Now if the magnet spacing is such that as it is coming back up to the zero line and the next south pole magnet is approaching, it also will yield a negative going sinewave, hence your M wave.

So what your first sketch shows is improper magnet spacing.
The magnets need to be much closer so that the retreating north pole and the approaching south pole inductions overlap to yield an greater single peak to the sine wave.

Ron

[i_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!

You are right... I didn't read the second one... just dismissed it as it wasn't a magnet passing a coil...

Ron

[derricka]

Faraday rules!

...And anyone caught breaking the Faraday rules, will be locked up in the Faraday cage!

http://www.youtube.com/watch?v=Zi4kXgDBFhw&feature=related

[baroutologos]

@ i_RON, Hoaptoad and others.

Ok i have been pondered on the voltage debate on TDC. This is not a philosophical issue since it is the factor that makes perepiteia works.

You clearly presentated the lathe picture and the sine wave that a single polarity magnet made. That's my experience also, BUT. Can you confirm on the scope that zero voltage coincides with magnet TDC?
Can you also verify that does not change (slip) with speed? I guess not.

Anyway whether the reason is:
* paracitic capacitance (easily can be found out by bifilar setup)
* iron lag in being magnetized/demagnetized (Bedini's charged iron saying)
* or plainly the magnet at TDC has enough voltage if not maximum (as Mr T suggests

The result is that at TDC we have voltage that initiates a delayed current, which in turn causes accelaration or at least minimum decellaration. (unless of course you still believe accelaration is due to eddie losses halt)

Regards,
Baroutologos

[baroutologos]

Apart form theorizing let's talk about experimenting.

I mounted the previous days two coils IN PHASE (specs see previous posts) wound with 29AWG @ 30 ohms.

I spinned the machine some 1100 rpm. Each one achived some 55 volts and had an 0,270 Amps oscillating current. Neither manifested accelaration at this speed.

Then i series connected them. Nor then i achieved any accelaration.
Even though my experiment is totally inconclusive, i think connecting 2x35 ohms same phase HV coils cannot give the accalaration effect of a single 70ohm one.

Additional findings: Voltage effectively doubled (some 110vAC) whereas current remained the very same (normally).

An interesting note is that the cogging torque of two coils simultaneous in phase is very high . Even shorted does not vanished as the odd-even (magnet-coil) configuration does.

Experiments with laminated core
.........................................................

I dismantled an trasformer and used its laminations for experimenting.
The core is 14mm x 20mm x 40mm.

Even though quite heavier and more mass than insulated wires, the rotor spins faster with it on same magnet gap than previously with 2 other wire core coils. It outputs also more power on the same windings.
So, laminations is the way to go.

Anyshop to procure, laminations & bobins that fit them ?

I plan at replacing the pulsed motor with a Permanent magnet DC motor as first step in order to achieve some 3000 rpm (finally) and to mount some 10-20 coils around rotor in accelaration mode of course.

Regards,
Baroutologos