Confirming the Delayed Lenz Effect

[MileHigh]

Synchro1:

Thanks for clarifying what you mean in your case when your say bifilar coil.

Here are some comments about that and anybody is free to do their own testing on the bench to confirm this.

Supposing that you have a 500-turn regularly-wound coil and you have a (250 + 250)-turn bifilar coil as shown in your diagram.  The main difference between the two is that the bifilar coil posses the capability to a have higher voltage potential for the inter-winding self-capacitance of the coil.  However, the two coils possess the same number of turns and have the same inductance.

The way capacitance works is that it has more and more effect the higher and higher the frequencies that you are working with.  The pulse motor works at very very low frequencies.  Therefore it's expected that there will be no noticeable effects from using the bifilar coil in a pulse motor as compared to a regular coil.  In both coils, the self-capacitance between windings might be on the order of tens or hundreds of picofarads.  That is an extremely small capacitance.  In addition, the capacitance is "transient" and only exists at very very high frequencies.  There is no insulating dielectric between two plates like in a normal capacitor.  There is actually a conductor between the "plates" which are the windings of the coil.

Relative to the bullet points in that graphic, and comparing a 500-turn regular coil with the (250+250)-turn bifilar coil you get the following:

1) The bifilar coil will not respond faster to the firing pulse
2) The bifilar coil will not have an increased magnetic field strength
3) The back-EMF spike produced will not be larger for the bifilar coil.  The higher-voltage on the inter-winding capacitance may slow down the slew rate of the back-EMF spike and also slightly reduce its amplitude
4) There will not be any increased generator output.  Generators operate at low frequencies and the bifilar capacitance will be insignificant and not have any affect at all

So, in pulse motor application it's highly unlikely you will see any difference in performance when you compare a 500-turn regular coil with the (250+250)-turn bifilar coil.  Any pulse motor keeners that want to check this just have to make sure that the two coils that they test and compare have the same number of turns and approximately the same dimensions.

As a final comment myself personally I would not call this a "bifilar coil."  "Bifilar" implies two separate conductors where the coil being discussed here is actually a single-conductor coil.  It needs another name so that it is not confused with a true bifilar coil.  Perhaps call it a "high-voltage self-capacitance" coil or something like that.

MileHigh

[conradelektro]

Skycollection has posted a video (Confirming the delayed Lenz Effect) with a message for replicators

http://www.youtube.com/watch?v=VP-k-AW-ejM

According to the speech in the video he is going to explain it step by step in the future

The best output reading I can see in this video is 14.25 Volt at 0.18 A, which is about 2.5 Watt. (I just take the highest readings on his meters which are visible, it might not mean anything tangible.)

Unfortunately we can not see any input power to the rotor driver. But I guess we would have heard some bragging in case the indication for OU were hight.

Greetings, Conrad

[synchro1]

@Milehigh,

            I beg your pardon here, but you're spreading stark falsehoods about the bifilar's attributes. Two coils with Iron nail cores wraped differently as you describe will pick up an uneven number of tacks when charged.   

Here's a test done by degrees of magnetic compass deviation:

http://www.youtube.com/watch?v=iATOcAmbz3E

[MileHigh]

Synchro1:

Anyone can check what I am saying by doing their own bench tests and compare he two different types of coils.  I have explained the logic for the lack of differences between the two types of coils in a pulse motor application.

If you use ether type of coil as an electromagnet, then that's a DC application.  If you set up a very controlled experiment to pick up tacks you should not see any differences between the two coils.

I also looked at the clip that you linked to where the guy shows the compass deviation.  The guy is making a fundamental mistake in that clip and therefore coming to an incorrect conclusion. Can anybody spot the mistake?

MileHigh

[gyulasun]

Hi Conrad,

It occured to me to show you romerouk's coil switching schematic done also with a Hall sensor and a pnp transistor and the reason I refer to it is he connected a diode across the collector-emitter of his transistor.  I thought you might wish to test it.
You can see the drawing here http://www.overunity.com/3842/muller-dynamo/msg284131/#msg284131 in driver_coils_setup.jpg or redrawn by Groundloop in romerouk_setup.jpg a bit scrolling down the thread.  Your UF4007 diode is a good one to use there too.
About the purpose of this diode: I think the induced voltage in his coils from the rotor magnets is fed back to the battery via the diode.  If this is so, then your input current draw from the power supply should be a little bit reduced when you use that diode.
EDIT: no need for doing any other change in your switching circuit, just connect the diode and watch input current draw and maybe the waveform across the coil as before. The possibility that this diode may cause Lenz drag is not zero though...

rgds, Gyula