positioning of multiple toroid transformers

Go To Last Post
4 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I'm in the process of putting my self-built power supply into an enclosure (finally). Since i had them around for years, i didn't use a single transformer, but two weaker ones with the secondary windings working in series. Now, in mounting them into the enclosure, i'd like to know about the optimal positioning of those two regarding their magnetic fields. Is is ok to just stack them and easily fix them with a single screw? Or would it be better to have them mounted side by side? Or is it totally irrelevant how i position them?

-- Thilo

Einstein was right: "Two things are unlimited: the universe and the human stupidity. But i'm not quite sure about the former..."

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

DO1THL,

Since these are power transformers, any orientation between them should be fine. If they were low-level signal transformers, maybe the positioning would be a bit more critical.

Toroidal transformers and inductors have pretty-much fully enclosed magnetic fields. I.e. A large majority of the flux is inside the toroid not in the space around it as in certain other geometries of inductors and transformers.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

As a matter of personal choice, I would not stack them, just because of my cautious nature. Odds are, you can get away with it but I like to be certain of how things will turn out.

I am a little puzzled by the statement

Quote:
i didn't use a single transformer, but two weaker ones with the secondary windings working in series.
.

If by "weaker", you mean lower output voltage, then that will work. If by "weaker", you mean lower current capability, that won't work.

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:

If by "weaker", you mean lower output voltage, then that will work. If by "weaker", you mean lower current capability, that won't work.

Yeah, sure. I chose "weaker" for the lack of a better word being in a hurry. Of course the power rating is sufficient, it's just the voltage that needed to be doubled by using two transformers in series. And to avoid further misunderstandings, of course only the secondaries are connected in series :-)

Einstein was right: "Two things are unlimited: the universe and the human stupidity. But i'm not quite sure about the former..."