malua mada! wrote:

===============

I am running 3 phase AC into a set of transformers, Y config, and thence into bridge rectifiers . One leg of the output side of the transformers goes to the diodes.
the other leg to the Y connection.
That Y connection gets warm. (why?)

** Have you linked the " + "and " - " of each bridge ?

That is NOT how it is done.

Google it.

..... Phil

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I am running 3 phase AC into a set of transformers, Y config, and thence into bridge rectifiers . One leg of the output side of the transformers goes to the diodes. the other leg to the Y connection.
That Y connection gets warm. (why?)
Should it be connected to DC ground?

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 2021-02-02, malua mada! <[email protected]> wrote:

I am running 3 phase AC into a set of transformers, Y config, and
thence into bridge rectifiers . One leg of the output side of the transformers goes to the diodes. the other leg to the Y connection.
That Y connection gets warm. (why?)
Should it be connected to DC ground?

The y connection should not get warm, is the connection there good?


it takes 6 diodes for a threee phase rectifier which is not normally
called a "bridge", that term is usally reserved for diamond-shaped arrangements that have input on two opposing corners and output on the
other two.

--
Jasen.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

malua mada! <[email protected]> wrote:

I am running 3 phase AC into a set of transformers, Y config, and thence into bridge rectifiers . One leg of the output side of the transformers goes to the diodes. the other leg to the Y connection.
That Y connection gets warm. (why?)
Should it be connected to DC ground?

The connection between this and that point is wrong.

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Sorry I was not aware that the term "bridge" is reserved ... but I AM using 3 bridges. The two AC inputs on each device are joined thus doubling up / paralleling (?) each bridges' diodes.
I could have done it with one and a half bridges (not doubling up on diode pairs) but why be stingy.

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On 2021-02-03, malua mada! <[email protected]> wrote:

I AM using 3 bridges. The two AC inputs on each device are joined thus doubling up / paralleling (?) each bridges' diodes.
I could have done it with one and a half bridges (not doubling up on diode pairs) but why be stingy.

That should work perfwectly so long as the DC terminals all match up.

The only reason I can think of for heat at the Y point is if the
terminals are dirty or loose.

--
Jasen.

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