Re: Another transformer question

when connecting the secondaries in parallel they should be in the
correct phase this can be checked with an oscilliscope or when you
touch secondary leads together you will see a spark (out of phase)or
no spark at all (correct phase) this should be done with the same
model transformers. If putting two transformers in series the max
current thru the circuit must not exceed that of the lower current
transformer. this arangement is also called buck boost.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Tony Jeffree <tony@j...>
wrote:

> At 13:44 07/05/2003 +0000, you wrote:
> >I have 2 transformers that look just like the one that was posted
> >here yesterday, only mine are 18v 2A. I am trying to get 18V 4A,

how

> >can I do this? I plan on wiring them in parallel but I am a little
> >confused. No problems on the input, but on the output. I've looked

at

> >a diagram in the files section on how to wire them and it shows the
> >wire from T1 at the top of the coil going to the bottom of T2 and

the

> >bottom wire from T1 going to top of T2. Is this how I want to wire
> >for 18v 4A? I'm going to be running a DeckCNC controller/driver.
>
> Presumably these are identical transformers? If not, all bets are

off.

>
> If you number the 4 terminals (2 primary, 2 secondary) on both

transformers

> identically, as P1, P2 (for the primary) and S1, S2 (for the

secondary), then:

>
> - Wire P1 to P1 and P2 to P2; and
>
> - Wire S1 to S1 and S2 to S2.
>
> The important thing is that the phase of the outputs match; if you

reverse

> the primary connections on one transformer, they will no longer

have their

> outputs in phase with each other (bad news!).
>
>
> Regards,
> Tony