Quote from: markzpeiverson on March 26, 2008, 11:13:14 PM

LUC:
What's the rated RPM on that motor?  1760?  And it went to 3000+ before the generator decided to rapidly self-disassemble...
-M

The one in the Kinetrics report was 3600 RPM I think. Not necessarily the same one...

Edited to add...sorry Luc...I posted when you were posting.  Wasn't sure if you were around to answer tonight...

Quote from: OilBarren on March 26, 2008, 09:31:46 PM
Luc's TRANSFORMER DATA ââ,¬â€œ MARCH 26TH, 2008

Primary Input

Voltage = 0.736 volts
Current = 0.01 amps
Power = 0.00736 watts

Output @ 1 k Resistor

Voltage = 3.377 volts
Power = 0.0114 watts

Efficiency = 154.9 %

Come on, April 1 is nearly a week away.

The single data point doesn't really give us useful information since it's too inaccurate in the last digit of the meter. But you can extract some VERY interesting data from this setup - since you already have it in place it will be very easy to make a series of measurements with various different input voltages: for example 0.5, 1.0, 1.5, 2.0 etc through to about 10v, say. You can then plot efficiency against input voltage. At the lower voltages you'll still run into the meter resolution issue but the trend line will be very illuminating indeed: you'll be able to see at what voltage it passes 100% efficiency, if it does. How about trying that?

PB

Quote from: gotoluc on March 26, 2008, 11:28:16 PM

These Ryobi grinders can go up to 3,500 RPM. Thane has never allowed it to go anywhere close to that speed since he had a few magnets fly off in a demo once and ever since has been real careful. I just wanted to see what would happen at around full RPM. Now we know Thane is right. So be careful.

Luc

Is glue the only option for affixing the magnets?

Quote from: polarbreeze on March 26, 2008, 11:30:25 PM

Quote from: OilBarren on March 26, 2008, 09:31:46 PM
Luc's TRANSFORMER DATA ? MARCH 26TH, 2008

Primary Input

Voltage = 0.736 volts
Current = 0.01 amps
Power = 0.00736 watts

Output @ 1 k Resistor

Voltage = 3.377 volts
Power = 0.0114 watts

Efficiency = 154.9 %

Come on, April 1 is nearly a week away.
PB

I guess now you can't wait to see what we'll post on that day.

Quote from: JustMe on March 26, 2008, 11:32:23 PM

Quote from: gotoluc on March 26, 2008, 11:28:16 PM

These Ryobi grinders can go up to 3,500 RPM. Thane has never allowed it to go anywhere close to that speed since he had a few magnets fly off in a demo once and ever since has been real careful. I just wanted to see what would happen at around full RPM. Now we know Thane is right. So be careful.

Luc

Is glue the only option for affixing the magnets?

No, Epoxy is an added extra to help hold. If you look at my picture of the plastic rotor, I had 2" holes right through the 1/2" rotor to hold the magnets in place plus the epoxy all around each side of the magnets on the rotor. So the rotor should of been doing most of the holding of the magnets, the epoxy on each side was mostly to keep it from sliding out of the hole. The problem with the rotor was it was Acrylic Plexiglass which can crack under pressure. I had that 1/2" plexiglass laying around, so I just used it. But I should of known better and use Lexan which does not crack, even with a gun shot bullet.

Luc