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Thread Tools | Search this Thread |
13th March 2008, 07:48 PM
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#21 |
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diyAudio Member
Join Date: Mar 2008
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HI,
those transformers from the picture seems to look like those from computer power supply . In fact most of the computer power supply are rated at 450w peak ,and a maximum of 250w . In that picture are 8 transformers (8x250w=2000w). --------------------------------------------------------------- sorry for my english |
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13th March 2008, 07:52 PM
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#22 |
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diyAudio Member
Join Date: Mar 2008
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I wont to built my smps with only one transformer and these because i want to minimize the space ....
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14th March 2008, 10:54 PM
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#24 | |
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diyAudio Member
Join Date: Nov 2004
Location: Florida
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Quote:
 Are you going to use a really ligh frequency and low primary turn count to make such power? To get really big toroid cores: http://www.cwsbytemark.com/prices/corepwr.php (scroll to bottom) They have a 5 inch, and also a 4 inch double height core, along with other sizes. Maybe if you use a LOT of THICK coil wire, and a HUGE core, you could make these work. |
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14th March 2008, 11:17 PM
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#25 |
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diyAudio Member
Join Date: Mar 2008
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HI
EWorkshop1708 YES ,for this smps I will use an etd59...here is a picture http://www.metrafo.ro/poza_428044.html THE core is not very expensive they only cost about 6$ each ,for the imput capacitor bank i will use 4X460uf/420v ,and 4xirf450 these all will cost about 50usd and many else small components ...very cheap . The only big problem is the pcb. I'm learning the orcad cadence now ... |
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16th March 2008, 06:01 PM
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#26 |
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diyAudio Member
Join Date: May 2005
Location: Avesnes/Helpe
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Hi,
4*460µF for input capacitor bank is not enough for such a power (2600W), input voltage ripple will be very large ! in my half bridge project 2*1800µF/200V in series for 25V ripple voltage at the input @700W |
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16th March 2008, 06:13 PM
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#27 |
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diyAudio Member
Join Date: Mar 2008
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Hi ,
Alexclaire those 2*1800uf/200v will give you just 900uf ...I will have 1840uf at 320v ,and my amplifier has 2000w ,but I will newer use even 1600w. The smps ,in the worst case will deliver 2000w ... |
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16th March 2008, 11:31 PM
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#28 | |
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diyAudio Member
Join Date: Nov 2004
Location: Florida
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Quote:
Do you think it's better to run Amplifier from SMPS from Mains AC instead of 60hz transformer? I'm wanting to build one for a sound system because it's all 4 ohm and needs high current. I also don't like AC hum that can come out of the speakers at 60 hz. What kind of PWR transistors do you use at that side of the SMPS? I tried 350V MJL4281/4302 and blew them up. |
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17th March 2008, 12:00 AM
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#29 |
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diyAudio Member
Join Date: Mar 2008
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HI,
you should use transistors with a minimum 450v ... I hope this week I gonna finish the pcb layout (the school program stops me ) ,and I will post picture with it ,and maybe with the smps. |
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27th March 2008, 01:32 PM
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#30 |
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diyAudio Member
Join Date: Mar 2008
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IF anyone knows something about smps please post here please....
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