Quote from: AbbaRue on July 08, 2012, 10:41:11 PM
A suggestion concerning getting a 1:1 ratio Transformer. 
Just get 2 rolls of wire the same awg. and wind a bifilar coil. 
Wind as many windings as you need to get the right impedance.

You are right about that but the problem is having the right amount of turns, output wattage, etc. It will be just another place where you can go wrong. At least with standard transformers you have the specs and a proven performance.

I am wondering, I have two good sized toroidal transformers that have two primaries and two secondaries each (Hammond 182P12) and they output 12v at 10 amps so input has to be 120 volts at 1 amp. Maybe by using only the primaries since they are identical and separately wound.
Shown here: http://www.hammondmfg.com/182.htm

I will try it tonight.

Also Hammond has isolated transformers here.
http://www.hammondmfg.com/169.htm
The 169VS seems to be the best choice.

wattsup

@all

Could not wait till tonight so I tried the two Hammond toroidals.

Input: 121.2 VAC at 0.24 amps
Output: 57.6 VAC at 0.50 amps
No capacitor used.

Sorry for messy photo.

Connected as per @JN's first photo, post #1.

Got to go to work now.

wattsup

Quote from: wattsup on July 09, 2012, 10:07:22 AM
@all

Could not wait till tonight so I tried the two Hammond toroidals.

Input: 121.2 VAC at 0.24 amps
Output: 57.6 VAC at 0.50 amps
No capacitor used.

Sorry for messy photo.

Connected as per @JN's first photo, post #1.

Got to go to work now.

wattsup

Thanks for presenting these results, wattsup, and for the photo!

Input: 121.2 VAC at 0.24 amps = 29.1 W in
Output: 57.6 VAC at 0.50 amps = 28.8 W out

Efficiency = 28.8/29.1 = 97%, which is pretty good efficiency! 

(I wonder if these toroidals are rated that high...) 
Anyway, I'd say you are off to an excellent start here.
Steve

Efficiency

An update, although its not much more than before.

I tried making a square wave (N-S) Bedini motor and failed to do so.  Back to the regular Bedini (N-N).  7000 rpm 42khz.  Can't seem to use the 1:1 torroid setup without burning up transistors.  The torroid acts like a dead short for the AC flyback.  I'll have to study the circuit a bit more, but a 1 Ohm winding is just about a dead short and not protecting the transistor.

So back to the manual AC.  Using the two transformers as drawn and with a capacitor across the second transformer.  A 4.5 volt LED string. 

I can't light the 4.5 v LED string with 1.2 - 2.4 volts directly wired with DC. 

But, striking the battery rapidly simulating 1/2 wave AC and through the transformers, the LEDs light brightly.  Doesn't matter which transformer lead is positive or negative DC.  Again this seems to be very much like Joule Thief action running the LEDs off flyback.  I am sure if I bothered to use these two 1:1 transformers in a Joule Thief they would work quite well to convey the spiked voltage.  While Joule Thiefs defy quick reasoning, they aren't Over Unity.

How the author of this thread increased voltage and amperage with this circuit is a mystery to me.  Perhaps the name of the invention "TrollBuster" is a clue. 

Watts Up,  Please try a Diode as shown in the schematic.

That should give O/U.  Also, try various size Caps in different places.

Thanks for sharing your set up.