Does any body know where to get a high frequency variac?
Most variacs handle only 60hz, though I did find some that can handle 2000hz but only with limited current.
Stans rotary pulse votlage frequency generator looks like an off the shelf metered variac that has been modified,
http://images.google.com/images?hl=en&q=metered+variac&um=1&ie=UTF-8&sa=N&tab=wiI really want to test connecting the stator output to an AC variac and then to the rotor, but how do you provide the initial power and are there high frequency variacs?
Also I would really like to analyze the pics posted by passion. There are some major discrepancies in the schematic for the rotary pulse voltage frequency generator pics.
The input is 60 hz which is then rectified so the rotor input will always be 60hz pulsed DC?
However in his photos stan has labelled the unit to take only 110Volt DC input.
The question really now is has any body tried using something like a variac which doesnt kill the stator output frequency which i believe the capacitor that hydro originally tried does kill...it smoothes it out, so i doubt you could have actually achieved resonating alternator.
How does one know the alternator is resonating? in other words what are the benchmarks for a self resonating alternator?
(That is stator output frequency is also the rotor input frequency regardless whether its a feed back loop or external pwm to pulse the rotor)