parallel the transformers

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runebivrin

runebivrin

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Joined 2003
bivrin.net
K-amps said:
Just connect the toroids in parallel and check.
Click to expand...

Correct me if I'm wrong, but it's a single transformer with dual secondaries!

It's still a useful idea to place a lightbulb in series, but I'd start with the lower wattage = greater resistance, and then gradually proceed to no bulb at all.

K-amps said:
Just remember one thing, Safety first!!
Click to expand...

Amen!

Rune
 
K

K-amps

Member
Joined 2003
runebivrin said:


Correct me if I'm wrong, but it's a single transformer with dual secondaries!
Click to expand...

I think he has access to two 500VA toroids each with dual 18v secondaries... If not... I don't know why he'd use a single 18v supply... not that he can't, but not sure if he'd do that.

Again I may be wrong on that but as they say, options, options, options!


;)
 
D3

D3

Member
Joined 2003
Traffo's

Thanks guys for taking the time to avise......it's really appreciated....

I have asingle traffo.............this has two lots of secondaries rated at 500va ....................... the traffo is supposed to be rated as 1000va overall..........

Basically its like two traffo's in one.....
 
K

K-amps

Member
Joined 2003
OK, I stand corrected on the number of "cores" you have, but the solution still stands. As long as you can located the two sets of secondaries of same voltage/ polarity, you could still paralell everything using a bulb in series with the primary.

I just hope the secondaries are:

18-0-18-18-0-18 and not

18-36-54-72-90-108...

cheers!

K-;)
 
P

Posthorn

Member
Joined 2003
These datas should match within 10% :

Rcu=Copper Resistance of prim- and sec-winding (simple to measure with an Ohmmeter the transformers should be on working temp

Secondary voltage with load!!!!(Most times this fits when Rcu fits)

If you get it hard to 10% you can mod the suply to (2*R)CRCRC
One R for each Trans



PS:If you burn down your house don't send the loyer please maybe some things get lost by translation
 
john-china

john-china

Member
Joined 2001
moamps : hi

attachment.php




i think this schematic can not reach 1000w , beacause of limited current of each wind , it can produce 500w ,just as one transformer.

MR. moamps , do you think if i am right?
 
D3

D3

Member
Joined 2003
Traffo

Surely as thewindings are parrallel ......... the Traffo is designed to give two x 18-0-18v @ 500va similtaneously.........therefore the primary winding is rated accordingly....to supply 1000va.

So you sould be able to parrallel secondaries to give 18-0-18 at 1000va..............or in series to give 36-0-36 @ 500va

Surely this make sense?????
 
moamps

moamps

diyAudio Member
Joined 2002
moxtone.com
Re: moamps : hi

john-china said:
i think this schematic can not reach 1000w , beacause of limited current of each wind , it can produce 500w ,just as one transformer.
MR. moamps , do you think if i am right?
Click to expand...
Hi,
each coil (wind) is loaded with only half of sine wave. Wire dimension is usually calculated for full sine load. Than I think that each wind can be loaded with double current but half time.
But, I agree that this schematic isn't optimal (higher losses etc.).

Regards
 
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