Confirming the Delayed Lenz Effect

[conradelektro]

Hi Conrad,

Okay I understand the positioning.  Do you happen to have an L meter to check the relay coils inductance? No problem if you do not,  just it would be helpful to know for the black and the white coils the mH values because it may also explain the possible force they can exert on the magnet at a given input current.  (The higher the L value, the higher the force, assuming the same current.)

Well, the enlarged head end of the white coil actually may 'increase' flux connection (so to speak), not neccessarily a disadvantage.

Thanks for the scope shots on this newer setup.  I have the impression that the very narrow spikes are cut by the immediate supply voltage change just after the switch-off, I mean some of the collapsing energy may get cut, so is lost from the recovery possibility. This is why the duty cycle would be good to control i.e. making it less than 50%, perhaps it would not influence too much the rpm.

rgds, Gyula

@Gyula: Eventually I will try a trigger coil which will allow quite easily (by moving it closer and farer from the spinning magnet) to control the duty cycle. With two drive coils, the trigger coil has to be on the side of the spinning magnet, because the trigger coil should be where one of the drive coil is. I do not want to wind the trigger coil over the drive coil because I want to move the trigger coil into different positions.

Duty cycle is probably not very important for the speed, but it might dramatically cut power demand (may be by half).

I will eventually redo Version 1 mostly like Version 2, but with the axle sticking out a few centimetres on one side. Then I can try many set ups, many drive coils and various control sensors (control disk with little magnets, Hall sensor, trigger coil, Reed Switch like you said combined with a transistor, even opto-gates).

Greetings, Conrad

[synchro1]

Skycollection dynamotor power measurements"

http://www.youtube.com/watch?v=D3qXaRNEQyE

Quote from youtube:

"THE INPUT WATTS ARE : 12 VOLTS X 0.38 = 4.56 WATTS  AND THE OUTPUT WATTS THREE PANCAKES ARE : 17 VOLTS X 0.26 = 4.42 WATTS".

That's 96.875% efficient.  Close to unity. He could do as well just placing one pancake output coil over the pancake pulse coil like  JLNaudin's "Gegene".

[MileHigh]

He can improve the test by using three resistive loads across the coils with three true-RMS multimeters reading the RMS voltage.  In a lab you have those decade resistor boxes.  The ideal would be to have three decade resistor boxes, one per output coil.  Then you could put the motor through its paces and see how it does with different loads.  I love his build style but you don't see the output measurement.

One thing to remember about pancake coils as pick-up coils is that the inner coils would normally cut less changing magnetic flux as compared to the outer coils.  So by design they inherently will pick up less power as compared to a circular coil.

[Farmhand]

@Gyula: Eventually I will try a trigger coil which will allow quite easily (by moving it closer and farer from the spinning magnet) to control the duty cycle. With two drive coils, the trigger coil has to be on the side of the spinning magnet, because the trigger coil should be where one of the drive coil is. I do not want to wind the trigger coil over the drive coil because I want to move the trigger coil into different positions.

Duty cycle is probably not very important for the speed, but it might dramatically cut power demand (may be by half).

I will eventually redo Version 1 mostly like Version 2, but with the axle sticking out a few centimetres on one side. Then I can try many set ups, many drive coils and various control sensors (control disk with little magnets, Hall sensor, trigger coil, Reed Switch like you said combined with a transistor, even opto-gates).

Greetings, Conrad

Hi Conrad, I see you use photo interrupters/switches as well. Some circuitry can be arranged to give manual pulse width control with a pot (independent of the trigger pulse width), as well as retriggering to accelerate up to speed as a Bedini type setup does. I put some drawings in the COIL FOR ELECTRO-MAGNETS thread, I've put together a very simple new frame, rotor and coil assembly so I can refine the circuit.

I wonder is there a more appropriate thread for discussing just basic pulse motors and the driving arrangements of different kinds. Would be good to pool idea's.

I'm not sure where to post about pulse motors and their driving circuits. 

Nice work by the way.
Cheers

P.S. Does anyone have a 3D rendering of the magnetic field shape of a diametrically magnetized tube magnet ?

..

[TinselKoala]

The Marinov Slab :

(Not a "free energy" candidate but one that exhibits some other controversial behavior: it's a N3L violator. In my dreams.)