Tranny: "Parallel" Secondaries

dobbeln · 20th January 2005, 05:25 PM

Hi!
I´ve got a big tranny (450VA) for a powersupply!
The Secondary voltage is 15V each. There are 6

secondarys!
The question is: What to to with the unneeded secondarys?

confused
Parallel it (with correct polarity, to lower resistance?)
or leave them unconnected?

Any suggestions, please!

Best wishes from Germany!

Jan Dupont · 20th January 2005, 08:45 PM

You can parallel them with good result (adding more current each time), however you need to make sure that they are all in fase when paralled.....

dobbeln · 24th January 2005, 06:11 AM

Thanks!
That were my thougts, too.
I was just wondering, because the lable only mentioned 2 Secondaries with 15V each (one is red- yellow and the other is blue- green)
Those windings exists 3 times each!

Bye, dobbeln

AndrewT · 24th January 2005, 02:32 PM

Hi,
or you could series link the secondaries giving 45Vac.
or parallel 1 pair at 15Vac and series the last at half current to give 15Vac hi current and 30Vac @lo current.
regards Andrew T.

20th January 2005, 05:25 PM	#1
dobbeln diyAudio Member Join Date: Jun 2004 Location: Wolfenbüttel	Tranny: "Parallel" Secondaries Hi! I´ve got a big tranny (450VA) for a powersupply! The Secondary voltage is 15V each. There are 6 secondarys! The question is: What to to with the unneeded secondarys? confused Parallel it (with correct polarity, to lower resistance?) or leave them unconnected? Any suggestions, please! Best wishes from Germany!

20th January 2005, 08:45 PM	#2
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	You can parallel them with good result (adding more current each time), however you need to make sure that they are all in fase when paralled..... __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com

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24th January 2005, 06:11 AM	#3
dobbeln diyAudio Member Join Date: Jun 2004 Location: Wolfenbüttel	Thanks! That were my thougts, too. I was just wondering, because the lable only mentioned 2 Secondaries with 15V each (one is red- yellow and the other is blue- green) Those windings exists 3 times each! Bye, dobbeln

24th January 2005, 02:32 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, or you could series link the secondaries giving 45Vac. or parallel 1 pair at 15Vac and series the last at half current to give 15Vac hi current and 30Vac @lo current. regards Andrew T.

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