Thane Heins Perepiteia.

[markzpeiverson]

Hey, who posted the picture of OUman?

-Mark

[aether22]

Thane, you should consider taking say the 53 ohm coil and winding more turns on it to see if you can kill it by adding too many and if once you have added too many if you can still short just the 53 ohm portion to still get the effect.

Or make a multi tap coil with taps every 10 to 20 ohms.

Might get this turn thing sorted a tad faster that way.

[LarryC]

@Thane,

Your 1A NON WORKING COIL has the rear core flat bar in a vertical position. I'm not sure of the forward cores orientation from the picture, but the rear core flat bar would have to be in a horizontal position with the forward core in a horizontal position to pass the maximum flux.

From my testing of regular steel laminate positioning, I think the vertical position with obvious warped air gaps would ensure that very little flux is passed between bars.


Simple experiment:

Put six flat bars vertical, not screwed together,  next to a north and south neo. How many stay attracted?
Now put six flat bars horizontally next to a north and south neo. How many stay attracted?

Regards,
Larry

[CRANKYpants]

Induced magnetic fields act to cancel changes in flux, they will tend to cancel the flux from the rotor. (the magnetic flux in a normal transformer does not actually increase as the current through the primary increases, it stays about the same as the secondary cancels it)

YOU KNOW WHAT - THIS IS THE MOST INCORRECT THING YOU HAVE EVER SAID.

YOU CANNOT USE ONE MAGNETIC FIELD TO CANCEL ANOTHER - MAGNETIC FIELDS ALWAYS FOLLOW THE PATH OF LEAST RELUCTANCE IN AIR AND INSIDE METAL.

INCREASING FLUX MAGNITUDES INCREASE CORE RELUCTANCE WHICH GIVES THE IMPRESSION OF "CANCELLATION" BUT IT IS NOT SO. TO SUGGEST OTHERWISE IS A GROS MISUNDERSTANDING.

TAKE TWO SEPERATED IDENTICAL ELECTROMAGNETS POINT THEM AT EACH OTHER IN AIR - AND TELL US THE FIELDS CANCEL? ABSURD

NOW POINT THEM AT EACH OTHER THROUGH A METAL BLOCK - WILL THEY CANCEL EACH OTHER - NO WAY! THEY MAY SATURATE OUT INTO THE AIR BUT NEVER CANCEL.

The second point is that HV coils might have 1/100th or 1/1,000th the current but they have 100 or 1,000 more turns than their high current cousins and so their ampere turns is the same and they create an identicle magnetic field.

THIS IS NOT TRUE EITHER - CURRENT INDUCED IN A COIL IS INVERSELY PROPORTIONAL TO ITS RESISTANCE (IMPEDENCE).

MAGNETOMOTIVE FORCE = N x I

AS THE NUMBER OF TURNS INCREASES BEYOND THE COILS Q AND THE WIRE GAUGE IS REDUCED THE IMPEDENCE (WIRE RESISTANCE + REACTANCE) ALSO INCREASES - CURRENT DROPS AS DOES THE COILS MMFs.

Thane

[CRANKYpants]

At most points of the curve (take for example the 70% point), the torque increases while the speed also increases and the input current drops. The increased torque allows the system to drive the additional drag of a shorted or loaded coil. Higher load, higher speed, lower power input.

NICE TRY DICKWEED - BUT WRONG BECAUSE WE GENERALLY OPERATE BEYOND THE MOTOR'S PULL OUT POINT - WHICH WOULD HAVE SERVED US ALL WELL IF YOUR POP'S WOULD HAVE KNOWN ABOUT THIS CONCEPT MANY YEARS AGO.

Thane