Tesla's "COIL FOR ELECTRO-MAGNETS".

[TinselKoala]

Looks like a very nice pulse motor you are evolving there. I can't do the theoretical analysis as easily as MH, I have to build and probe, change and build, change and test, before I think I know what is going on in most circuits.

FWIW, I made another video showing the use of the FG, the scope and the frequency counter to resonate a tank circuit and then calculate the inductance of the coil from the measurements.
https://www.youtube.com/watch?v=VpJwCNBHUh0

[Farmhand]

Looks like a very nice pulse motor you are evolving there. I can't do the theoretical analysis as easily as MH, I have to build and probe, change and build, change and test, before I think I know what is going on in most circuits.

FWIW, I made another video showing the use of the FG, the scope and the frequency counter to resonate a tank circuit and then calculate the inductance of the coil from the measurements.
https://www.youtube.com/watch?v=VpJwCNBHUh0

Thanks very much for that, I'll watch that for sure, everything helps to build a intuitive "picture", some of us might not "get" things immediately but with time and more learning
the picture forms. I actually find this stuff very interesting and it's easy to get carried away with the circuits and stuff or the theory, study ect.

Not sure what exact arrangement I'll go with first for the pulse motor, but I want to be able to load the shaft a little bit at times so I need a rotating shaft not just a spinner.
And I want to use two opposing drive coils. I want to be able to change rotors or magnet arrangements easily as well. A vertical rotor rather than a horizontal one too. 

Cheers

[synchro1]

Retrod1's spinning a magnet sphere with a vertical Pancake and a sinusoidal 70 hz audio signal at low r.p.m. Coupling my spiral bedini to accelerate the magnet sphere, and switching to a full range signal generator, a higher frequency synchronus motor may be possible run by radio waves. I don't believe this has ever been accomplished before.

From Retrod1:


@"Synchro, you have a good memory. If the drive coil is observed with a scope one can see the interaction of the spinning rotor (magnet) field with the drive coil field. I believe this is what is causing the current decrease in Lidmotor's latest video. Using a pure sine wave on the drive coil makes this easier to observe ". 

http://www.youtube.com/watch?v=LTvEi_XuaL0&list=UUlgIDBiaYdtIk1O1AvqjK5Q&index=3

Transmitting a broadcast spin signal from a distance could delivery "Spin Energy" as a power company, coupled with Lenz free SBSC Spiral output coils. Everyone could have magnet spheres spinning around in the attic! All they would need is starter coils and circuits. The SBSC creates one N pole only in the center, no south. Therefore it pushes the south pole as an output coil.

[MileHigh]

TK:

Very nice clip.  I see you added the resistor and primarily used a sine wave for the excitation.  Way cool!  Just a minor comment and don't let it spoil the party:  I think you put the frequency counter on the LC side of the circuit.  It would have been better if you put it on the function generator side of the circuit.  It wasn't significant because you were testing a big coil.  If you were testing a tiny coil then you would want to have the frequency counter on the signal generator side.

You can also measure inductance using the L/R time constant.  Again for any keeners, this test gives you another way to measure inductance, and you can use it to double-check your readings.

A simple circuit with a signal generator set on a square wave connected to a resistor connected to a coil connected to ground is all that you need to see the time constant in action on your scope.  You have say a square wave that goes from 0 V to 10 V, and you put your scope across the coil to observe the time constant in "action."

I am linking to two clips that are a bit technical, but very well presented.

One comment about the mysterious "e."  "e" is a number, the value is 2.7182818...

This number is the "base of the natural logarithm."  Here is what it means:  Think of watching a car tire deflate, or water coming
out of a hole in the bottom of a bucket.  What you notice is that the rate the air flows is proportional to the air pressure and the rate
water flows is proportional to the water pressure.  When you think about that it "acts upon itself."  The tire is leaking air at a
certain rate which lowers the pressure which slows down the leaking rate which slows down the lowering of the pressure which
slows down the leaking rate and so on "forever."

The number "e" takes care of that, it's the "natural way things work" so they call it the "base of the natural logarithm."

"e" is used for capacitor and inductor formulas because the same concepts apply.  All scientific calculators will have "'e' to the x" on one of the keys.

So if you study these two clips you should be able to measure inductance with your scope, a square wave, and a resistor.

https://www.youtube.com/watch?v=81wiYdnZHBs

EDIT:  Oops, the link below is way to too complicated, most can ignore it.

https://www.youtube.com/watch?v=LLr1kZJas6U

[Farmhand]

Here's the circuit for processing the signal from the photo reflector or interrupter into longer or shorter pulse widths, with or without re-triggering.

I couldn't find it because it wasn't finished yet  my actual circuit has more parts for re-trigger control
and external shut down. I intend to use the circuit with a microprocessor to control a boost converter
for input voltage control to the motor coils and load switching ect., I've made a board with a picaxe 14M2 chip to control four output mosfets and
has four inputs as well with analogue to digital converters for sensing and pot control ect. 

The actual pulse motor circuit is independent of the picaxe, (hardware controlled). An interrupter of any kind will work with it as long as the input
specs of the 4047 chip are respected. The circuit could do with a change or two in design, which I'll get to when necessary.

CD4047 datasheet
http://pdf1.alldatasheet.com/datasheet-pdf/view/26874/TI/CD4047.html

Signal processing board. Just to clarify the 5 volts is so I can use the same supply for the picaxe board, the sensor module and the signal processing board chips.

Been a while since I used it but from memory I think the PW is determined by the R/C components, I also used diodes to do the less than 50% duty trick like with 555's, which
I didn't include in the drawing. Switching the re-triggering on and off while in use might be handy for start up ect., when full speed is achieved if the re-trigger is turned off there would be only one pulse per trigger event, (width adjusted by pot).