Update, test, Equilibrium Generator, LaFonte Group

[Butch]

Copy of post to group:
We are using a very sophisticated scope that is on load to us from David, a member of our group. It's a Tektronix THS720P. Mark ran a voltage test on the 8 stator design at 800 RPM during a training session with a technical representative from Tektronix. It showed 349 Volts RMS with a 1.16 KV peak voltage. Not bad for a machine that will in time be ran at 8000 RPM.
Then we realized we did not have a current probe to get a true current RMS value. We called Tektronix and they had one. They wanted $480.00 before tax and shipping!!!! and four week delivery!
We went straight to E-Bay and found one with a current bid of $99.00.
We are talking with the seller at this time. If the probe is $480.00 you can imagine what the scope price is! I have attached a picture of the wave form from the test. We are very grateful to David for trusting us with this scope.
We will be running higher speed tests, but we need to make sure we don't exceed the voltage limit of the scope. The voltage probe that came with it is a 10x and we need to stay under 3000 VAC. To go past that means buying another probe and you have read above what they can cost. I will keep you posted on the amperage test for true system power output. One thing I need to mention is the coils we are using are very undersized and we need to put coils three to four times larger on the next model.
Talk soon,
Butch

[hartiberlin]

Hi Butch,
can?t you just measure the current at a 1 or 10 Ohm shunt resistor ?

It is just so easy to use this.

Put a 100 Watts incandescent bulb together with a 1 or 10 ohm shunt in series
as the load and measure output voltage and voltage across the shunt
and post these scopeshots.

Regards, Stefan.