Author Topic: Combining the two 12V AC outputs on a transformer?  (Read 848 times)

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Offline drummerdimitriTopic starter

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Combining the two 12V AC outputs on a transformer?
« on: June 21, 2020, 07:45:17 pm »
I have attached a picture of the transformer I'm talking about.

Since it only have one Neutral/return lead instead of 2 for each of the windings, I'm guessing I will not be able to combine the two blue wires to get 12V output as that would be like shorting the transformer out am I correct?

The reason being I need this for a project that requires 12V AC input instead of the 24V between the two blue leads and since it is rated at 24VA, does that mean I can draw that much power from it even if one of the windings are used or does it mean I can only draw a max of 1A from the 24V output?


 

Offline madires

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Re: Combining the two 12V AC outputs on a transformer?
« Reply #1 on: June 21, 2020, 08:08:31 pm »
Yep, the phases of the two blue wires are inverted, i.e. 180° apart. And each 12V winding will provide 1A.
 
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Offline Benta

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Re: Combining the two 12V AC outputs on a transformer?
« Reply #2 on: June 21, 2020, 09:00:18 pm »
If you're able to get to the center tap (the black wire) inside the transformer and open that connection, you can parallel the two secondary windings for 12 V, 2 A.
Your picture does not show enough for more information.

 

Offline NiHaoMike

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Re: Combining the two 12V AC outputs on a transformer?
« Reply #3 on: June 21, 2020, 09:17:41 pm »
If you're rectifying it to DC, you can use a full wave rectifier instead of a bridge rectifier.
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