Rotating Magnetic Field's and Inductors.

[tinman]

Sorry to hear that... 

Can your FG do N-cycle or 1/2 cycle bursts triggered from an external input or Fin divided by N?
If you don't know for certain, what's the model number of the FG?

PW

Im sure my FG can do all sorts of thing's,as im still learning what they all are.
See pic below. The model number is the ATF20B.

[tinman]

OK,just tried the new coil for the testing,and this one is going in the bin.
It is not so good,and i have to drop the frequency to 20 Hz to get the rotor to sink.

And can some one please tell me what the difference between the average and mean value's when we only have a wave form that is above the 0 volt line--a pulsed DC voltage-that being across the CVR. I seem to remember asking Poynt once,and from what he could read,they are suppose to mean the same value when reading a pulsed DC value--as far as i remember. So that being the case,why dose the average go up,while the mean value remains the same?.

This test is inconclusive,as there is just no way i can make any sort of comparison in this case.

https://www.youtube.com/watch?v=aeDXKxLaD-4

Brad

[tinman]

Quote Magnaprop from Luc's thread

From the image resolution accuracy, I could tell no difference in the graph. each blip in the graph looks the same and the space between blips is the same. I would need much larger images or closer views to do a more accurate match up.

Below is a scope shot of the wave form across the emitter/collector junction from the new !!not so good !! coil. I now seem to have two wave forms being generated,in stead of the 1 1/2 i had with the other coil. Hope that is a little clearer Magnaprop--thats about as best we can do.


Brad

[poynt99]

And can some one please tell me what the difference between the average and mean value's when we only have a wave form that is above the 0 volt line--a pulsed DC voltage-that being across the CVR. I seem to remember asking Poynt once,and from what he could read,they are suppose to mean the same value when reading a pulsed DC value--as far as i remember. So that being the case,why dose the average go up,while the mean value remains the same?.

I dug this out of your manual before. Here it is once more...

Most scopes use the terms "Mean" and "Cycle Mean". Yours uses "Mean" and "Vavg" respectively.

When using "Mean", either you have an exact whole number of cycles on the display, or a great number of cycles, say 10 or more. If you do not use a whole number of cycles or a large number of cycles, then the mean value displayed may not be accurate.

[wattsup]

I mean the coil always made equal repel forces for both the ceramic and the Neo magnets I suppose,  (these were the action forces), yet the reaction forces from the ceramic and the Neo magnets were different to the same action force.

@gyulasun

In that video with the ceramic and neo magnet, there are a few things to consider.

1) The coil has a diameter and a depth of the winding.

2) Since the magnet is placed right next to one side of the coil diameter, one would presume that each magnet is receiving the same impulse from the coil but that should not be the case.

3) One would consider that the capacitor discharge creates an equal magnetic influence along the whole depth of the coil but that again may not be the case, but let's say it is. Let's say if the coil is 10 turns per layer and 20 layers that each of the 10 turns and above each of those turns you are producing the exact same magnetic influence.

4) Now, consider the ceramic magnetic influence itself can reach the 3rd turn of coil depth before it decreases to nill. When the cap is discharged, only 3 turns of the coil depth will cause the repelling reaction so the magnet does not go that far.

5) Now consider the neo magnetic influence itself can reach all the way across the 10 turns of coil depth and even further out before it reaches the same strength as the ceramic magnet. When the cap is discharged, every active layer and turn in the coil is now taking full part in repelling the neo hence it moves out further away.

6) So in part, this experiment is biased by the depth of the coil which disadvantages the ceramic magnet under the same cap discharge. At first look one would say both magnets are receiving the same impulse but they are not because the coil depth really favors only the neo magnet.

To do this experiment, you do not need a coil. All you need is some stout wire turned in a one layer spiral and mounted on a solid backing where either magnet can sit against the one layer coil hence the coil depth factor would not be of concern.

wattsup