Long story short: Can all transformers that have two equal secondaries be connected in parallel? Like these?
Long story...:
I want to build another Raspberry Pi Streamer, and use the "P05" linear power supply from ESP (I have an extra one).
According to the instructions, I should use a transformer with a single 9V output.
Those are hard to find... well, until I realized I can use a 2x9V transformer, and simply connect the two secondaries in parallel.
Some data sheets (like from Triad) specify the serial and parallel specs, but others don't. Does that mean I shouldn't "parallel" the secondaries??
I am talking about toroidal transformers from Vigortronix; here is the datasheet:
https://www.farnell.com/datasheets/3964075.pdf
I am thinking to get part no. VTX-146-030-209, which, with secondaries connected in parallel, should give me 1 x 9V @ 3.34A.
Please let me know if I got this right 🙂
Long story...:
I want to build another Raspberry Pi Streamer, and use the "P05" linear power supply from ESP (I have an extra one).
According to the instructions, I should use a transformer with a single 9V output.
Those are hard to find... well, until I realized I can use a 2x9V transformer, and simply connect the two secondaries in parallel.
Some data sheets (like from Triad) specify the serial and parallel specs, but others don't. Does that mean I shouldn't "parallel" the secondaries??
I am talking about toroidal transformers from Vigortronix; here is the datasheet:
https://www.farnell.com/datasheets/3964075.pdf
I am thinking to get part no. VTX-146-030-209, which, with secondaries connected in parallel, should give me 1 x 9V @ 3.34A.
Please let me know if I got this right 🙂
Should work, if the secondaries are in phase, of course.
It is odd that their data sheet does not explicitly says this, but it is assumed anyway.
It is odd that their data sheet does not explicitly says this, but it is assumed anyway.
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I would be careful with secondaries that aren’t explicitly stated for parallel operation. If the secondaries are not well matched you could see some significant circulating current.
Easiest way to check this, is to measure the primary current, with secondaries untouched/unloaded.
Then parallel the 2 secondaries. If no (significant) increase in primary current, you´re good to go.
Then parallel the 2 secondaries. If no (significant) increase in primary current, you´re good to go.
Thanks for all the prompt replies!
I think I will do this first...
Wow, that was easy. Customer service responded right away, put me in touch with a tech guy via email, who then confirmed that they can be connected in parallel to achieve what I'm looking for. Problem solved! Let's so how nicely these Vigortronix transformers will hum 🙂
Thanks everyone for participating!
Thanks everyone for participating!