[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] HV Transformer Winding

Hi Jim,
The winding direction of the primary will dictate the polarity in relation to the core and the secondary(s). "Be sure" to wind the primary in the same direction as the original primary (mark it, note it, before removing it). If it's removed already, then do as Finn suggested and use a mock up scrap primary to test it. It sounds that in your case, the secondary(s) are not something you want to mess with (I wouldn't). 

Bart


Jim Mora wrote:

Hi Bart,
Maybe I missing something, but consider a long wound coil of say two layers.
The solenoid wound coil verses an Archimedes spiral must have effect on the
magnetics? I'm curious as I need to rewind a mongo primary. This hugh core
has a low amount of primary turns and a high turns ratio. I just picked this
gem up from Jack Henderson in San Diego. It will make an extremely stiff
plate transformer.
Jim


-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of bartb
Sent: Friday, April 24, 2009 9:01 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] HV Transformer Winding

Hi Jim,
Flipping one of the hv coils in an NST will certainly change it's direction (multilayer coil). I would expect the same with the transformer Phil is building. This is why when re-assembly of an NST is performed, getting the hv windings oriented correctly is a must. Consider a flat primary coil and flip it (winding direction perpendicular to the center changes). 

Bart

Jim Mora wrote:

Hi Bart,
Flipping a coil bobbin does not change its winding direction (counter
intuitive). Test it with a spring of scrap piece of wire. Aren't neon
transformers wound in opposite directions (similar core scenario)?
Jim Mora

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of bartb
Sent: Thursday, April 23, 2009 5:38 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] HV Transformer Winding

Phil,
I'm in the same boat as Finn here. I'm thinking the windings are wound in opposite directions myself, but I'm not certain. I expected that you would be winding the secondary coils on individual bobbins at first and simply sliding them onto the core (in which case you could just test it flipping one of the bobbins). But are you winding the secondary coils on the core itself? If so, then Finn's suggestion is certainly the test to perform. 

Take care,
Bart

Finn Hammer wrote:

Phil Tuck skrev:

I have posted this on the 4hv.org forum, but as I started the project on
here I will include it on here as well.


Phil,
I have been thinking long and hard, but everytime I am close to a conclusion, my head starts to explode, and I have to start over. 
So I will advice you to do what I would do myself:
Energize the primary, and make a couple of nice test windings with some of the scrap insulated wire you have stashed away for this purpose. 
You only need some 5-10 turns to settle the matter, really.

Hope this helps,
Cheers, Finn Hammer
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla


_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla


_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla


_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla