RE: [TCML] Tesla coil - Phasing of Transformers

[Brian Hall <brianh4242@xxxxxxxxxxx>]

An excellent description of the process - thanks!  For visual learners, there is a video on youtube by The Geek Group that is also helpful and informative for phasing NST's for TC usehttp://www.youtube.com/watch?v=KSlQjw9OPG4
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Brian Hall   




> Date: Fri, 23 Nov 2012 15:38:11 +0000
> From: jhowson4@xxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Tesla coil - Phasing of Transformers
> 
> Phasing of transformers, 
> 
> What happens when transformers are parallel connecting while out of phase. 
> a) your not getting any form of output (as two opposing phases will cancel each other out, leading to a 0V output) 
> b) The current will travel between phases (as each connected terminal is providing the opposite voltage, hence why the above is a zero volt output) 
> 
> Tesla coil Symptoms 
> 1) you turn it on and nothing happens, no output sparks, no gap sounds, high current draw, and just the humming of the transformers is heard 
> 2) you try to arc between your transformer outputs and pretty much nothing happens 
> 
> 
> An easy way to test for proper phasing. 
> 1) Disconnect the transformers from the tesla coil 
> 2) Leave one side of the transformers connected together 
> 3) Make the other side a small gap, perhaps half an inch or something. 
> 
> 
> What you are looking for 
> -If they are out of phase you will see big fiery arcs at the gap 
> (as the voltages is 180 deg out of phase, if it were a DC source this would be like connecting + and -, or - and + ) 
> 
> -If the arcs are, completely absent, very small, not fiery , blueish they are in phase 
> (as the voltages are 0 deg out of phase, if it were a DC source this is like Connecting + and +, or - and -) 
> 
> 
> Fixing out of phase transformers 
> Just switch two of the input voltage wires for one transformer around and retest. 
> The difference in the arcs between out of phase and in phase will be very obvious. 
> 
> 
> 
> 
> I wrote this up for the archives so people have a good comprehensive phasing post to read. 
> 
> 
> 
> 
> 
> Cheers, 
> John "Jay" Howson IV 
> 
> 
> "Why thank you, I will be happy to take those electrons off your hands." 
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