Quote from: i_ron on May 16, 2008, 01:27:16 PM
Well I redid my set up... new open rotor, cup magnets and a wooden base.
At somewhere around 3K RPM it will accelerate when both mot secondary coils are shorted in series.

Glad you got positive results, but it is odd that you need such speeds.

Not sure what speeds Thane used for the MOT version but I don't think it is that high.
Have you tried to limit the speed more?

If I must get to those RPM's with my MOT setup it's going going to work very well, it will destroy it's self much past 2000 RPM I would guess. (been up to 1800rpm apparently)

I would not add that the reason I am reluctant to try Larry's idea of adding non magnetic spacers to the rotor is that currently only magnetic forces hold the magnets on.

Oh well, hopefully the coil Thane is sending me should work if the MOT's don't.

Quote from: aether22 on May 16, 2008, 05:44:58 PM
I would not add that the reason I am reluctant to try Larry's idea of adding non magnetic spacers to the rotor is that currently only magnetic forces hold the magnets on.

Hi Aether22,

Strapping tape that is commonly available has over 100 LBS per inch strength. If you use 1 cup per spoke with shim, with several wrapping both horizontal to the shaft and vertical to the rim and the cupped magnet within the rim, then the rotor weld or the motor shaft would break first.

Regards,
Larry

PS: Congrat i_ron and thanks for additional MOT cutting info!

Quote from: LarryC on May 16, 2008, 06:33:31 PM
Hi Aether22,

Strapping tape that is commonly available has over 100 LBS per inch strength. If you use 1 cup per spoke, with several wrapping both horizontal to the shaft and vertical to the rim and the cupped magnet within the rim, then the rotor weld or the motor shaft would break first.

Regards,
Larry

PS: Congrat i_ron and thanks for additional MOT cutting info!

Well it worked for you so I'll give it a try.

Quote from: i_ron on May 16, 2008, 01:27:16 PM
Lord Thane, of the hill

Well I redid my set up... new open rotor, cup magnets and a wooden base.



At somewhere around 3K RPM it will accelerate when both mot secondary coils are shorted in series.

Note the 'proper' pot magnets with a 1/16th plastic spacer around the magnet?

Ron

The funny thing on the stick is my rpm coil, lol

NICE WORK THERE ROCK'IN RONNY HACKJOB!

THAT IS ONE BEAUTIFUL ROTOR - BUT WHY DID YOU LET RED GREEN FINISH IT OFF FOR YOU? HE HAS HIS OWN OVER UNITY DEVICE? http://www.youtube.com/watch?v=yJJrjDI5xSQ

AT ANY RATE I SUGGEST "SMALLISH" MICROWAVE TRANSFORMERS FOR ANYONE ELSE WISHING TO TRY THIS AT HOME.

Thane

@i_ron,

A few questions to compare performance:

1 What are you using to control the speed?

2 What size are your magnets? I got better results with 1/8 cupped neos, then with 1/4 neos on back a cup.

3 What is the weight of your new rotor?

Thanks,
Larry