From: stoatgobbler@minasmorgul.demon.co.uk
Shaun wrote:
> "Stoatgobbler" wrote in message
> news:t1Gml.6176$ot7.1902@newsfe15.ams2...
>> Hi there,
>>
>> Does anyone know if there is a reason why I cannot mount toroidal
>> transformers one on top of another (stacking them) with a single metal
>> mounting bolt going through both? I can't see anything on the web which
>> suggests I don't do this.
>>
>> Stoat
>
> The magnetic flux from one transformer could interact with the other one
> being that they are that close to eachother. I've seen cases where cases
> where the toroidal transformer was made up of two or more rings stacked one
> on top of the other, and then the wire wrapped around them all.
>
> I used to repair industrial electronics and I've never seen someone stack
> toroidal transformers before. They mount them side by side with clearance.
>
> Shaun
>
>
Well, I've mounted them on top of one another, I can't find any problem
with it.....however....I've got I've used these toroids to create two
split rail power supplies (two independent +22v - 0 - -22v supplies) and
to make them independant I've "lifted" the 0v commons from the chassis
earth via 60ohm resistors. The greater the current I pull out of the
power supply the greater the potential difference across the 60ohm
resistor. when I pull 1.1A from the power supply then I have nearly 17v
across the 60ohm resistor. This voltage does not seem to vary with
raising the upper toroidal away from the lower so I don't think its to
do with this.
I've never "played" with this, I did expect a voltage across it (due to
eddy currents within the transformer?) but I thought it would be
nominal....0.25A is not nominal.
Is this normal?
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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