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Overunity Machines Forum



URGENT! WATER AS FUEL DISCOVERY FOR EVERYONE TO SHARE

Started by gotoluc, June 26, 2008, 06:01:38 PM

Previous topic - Next topic

0 Members and 7 Guests are viewing this topic.

gmeast

Quote from: Groundloop on September 28, 2008, 07:16:23 AM
@happyvalley808,

If you use a 110 VAC inverter and needs approx. 40 Watt then use a 110VAC to 110VAC 40 Watt transformer.
Connect the inverter to one of the transformer pairs, connect plasma circuit to the other pair. (For 230VAC you must use a 230VAC to 230VAC transformer.) You still need a series coil on the plasma circuit! See drawing.

What you are doing is insulating the inverter from the plasma circuit.

Groundloop.

To everyone,

I'm really glad to see isolation transformers being recommended to protect the inverters.  (They also have other advantages in these types of circuits).  But I would like to recommend that you adhere to a practiced engineering rule of thumb regarding power transformers running on a synthesized inverter waveform ... particularly modified sine wave inverters.  Whatever combination you use, try and make sure that your inverter is at least 2X (twice) the power rating of your isolation transformer.  That is, if you are using a 40VA isolation transformer then try and make sure your inverter is at least 80VA or greater.  The inductive load characteristics of a power transformer can 'slam' the square wave of the inverter and you can quickly approach peak inverter loads without knowing it.

Peace,

Greg

gmeast

Quote from: dllabarre on October 01, 2008, 12:07:02 PM
Greg

Where did you get your isolation transformer?
I'm seeing prices of $250+ and specifications in kv. ????

Thanks for your work and help on this,
DonL


Hi dllabarre,

You must be careful with all of this and I'm sure you are being safe.  I just want to say this.

Try McMaster-Carr.  The exact transformer I am using is:
70245K71      CONTROL TRANSFORMER WITH PLUG & CONNECTOR, 150 VA, 115V INPUT, 115V OUTPUT

@ $70.90

It has a 115VAC plug/jack in/out.  Very convenient.   If you're using 115VAC use a 1A in-line fuse in one of the legs (in or out) ... best in both. 

Now remember in the rating of an isolation transformer, the windings are constructed to produce 150VA @ 115VAC.  So if you're drawing more load, the output voltage will be less than 115VAC and if you are loading it less than 150VA then the output voltage will be higher than 115VAC by a portion of the ratio of YOUR load to that of the rated load for the transformer.

Peace,

Greg

dllabarre

Quote from: gmeast on October 01, 2008, 12:52:07 PM
Hi dllabarre,

Try McMaster-Carr.  The exact transformer I am using is:
70245K71      CONTROL TRANSFORMER WITH PLUG & CONNECTOR, 150 VA, 115V INPUT, 115V OUTPUT

@ $70.90

It has a 115VAC plug/jack in/out.  Very convenient.   If you're using 115VAC use a 1A in-line fuse in one of the legs (in or out) ... best in both. 

Peace,

Greg

Thank you.
Very good information!

The transformer is on it's way.

DonL




AbbaRue

You can always make an isolation transformer from 2 identical microwave transformers.
Grind off the welds to dismantle them and then place both 120 V windings on one core.
The 2 HV. windings could be placed on the other core to make a second isolation transformer.
This may be much cheaper then buying one, since most microwave ovens get thrown out because
the magnetron burns out but the rest of the parts are still in working order. 
Just make sure you discharge the capacitor before dismantling the oven.