2600w Smps

[dexter2003]

HY .
I HAVE JUST FINISH MY 2000W AMPLIFIER ,AND I NEED A SMPS OF ABOUT 2600W.
Can somebady tell me what ferrite core to use?
I think an etd 59 3c80 wil be good ?
For this amplifier i need 2x75v






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sorry for my english

 

[Andy L. Francis]

Ask here: Diyaudio's PSU forum board

 

[dexter2003]

I think that at this power lewel only a full bridge topology would work
but i didn't find a schematic of something like this.Can someone tell me where i would find a entire documentation about making a smps with ower 2000w.The k6 amplifier from a&t labs ,www.a-and-t-labs.com/K6_Sw_Amp/index.htm has some good documentation ,but the layout is very big .
If somebody knows some link's please tell me...


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sory for my english

 

[megajocke]

The layout for the K6 SMPS is scary! Looks like they have around 1mm of creepage distance between primary and secondary!

 

[EWorkshop1708]

How big of a toroid core is needed for this kind of power???

I'm also interested because an SMPS of large size can be used to make power inverters as well as amplifiers.

Would a 3 or 4 inch toroid be large enough?

 

[luka]

Hi

Yes 3in should be enough, but it must have Ae at least say 200mm^2, but is all depends on freq that you will use it. Even small cores can transfer a lot of power if freq is high, say much more then 100k

 

[dexter2003]

For 2600w smps an etd59@75khz would be good?

 

[luka]

Hi

Etd49 @ 100kHz should be enough to produce that power, so Etd59 should be good @ 75k, since it is that much bigger

 

[luka]

Hi

Forgot to say that full bridge should here be a MUST

 

[dexter2003]

Hi Luka
Etd49 @ 100kHz should be enough to produce that power



I don't think so because ,the k6 amplifier uses an etd 49 transformer ,but they say that continuous power is 1000w and peak power is 2000w ,but i need a power of 2600w continuous .

 

[luka]

Hi

If I did get from ETD44 @ 50kHz 730w continuous power, 1kw peak (because of not big enough input C)...Try and you will see, make full bridge, get ETD, use 50/50 duty cycle and load secondary, then you will see what you can get

 

[dexter2003]

Can somebady tell me where i can find a documentation with layout ?

 

[dexter2003]

Is this ferrite good for gate trnsformer :E20/10/6-3C90





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[N-Channel]

How big of a toroid core is needed for this kind of power???

I'm also interested because an SMPS of large size can be used to make power inverters as well as amplifiers.

Would a 3 or 4 inch toroid be large enough?

E-

Instead of the one-BIG-toroid, how about several smaller toroids, secondaries in series. The primaries would each be driven by their own MOSFET Pair/Quad. I have a schematic for a 2.5kW DC-AC Inverter that uses 8 transformers in this arrangement. Forces equal current-sharing and gives you the power level you want.

Say, 10 toroids with their secondaries in series, and each primary driven by its own set of MOSFETs off the 330VDC bus. This would enable ten half-bridges, or five cores for five full-bridges.

Attached is a copy of the power stage for the 2.5kW inverter.

Hope this helps,

Steve

 

[dexter2003]

How can i calculate the power trnsformer?
I must say that the only smps that I build was a car one @100w







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sorry for my english

 

[EWorkshop1708]

E-

Instead of the one-BIG-toroid, how about several smaller toroids, secondaries in series. The primaries would each be driven by their own MOSFET Pair/Quad. I have a schematic for a 2.5kW DC-AC Inverter that uses 8 transformers in this arrangement. Forces equal current-sharing and gives you the power level you want.

Say, 10 toroids with their secondaries in series, and each primary driven by its own set of MOSFETs off the 330VDC bus. This would enable ten half-bridges, or five cores for five full-bridges.

Attached is a copy of the power stage for the 2.5kW inverter.

Hope this helps,

Steve

Seems like a better solution. Where could I get 4 or more identical cores 2-3 inches or so?

 

[rcavictim]

Seems like a better solution. Where could I get 4 or more identical cores 2-3 inches or so?

Stores that sell these in Canada are abundant. They are called donut shops. 😀

 

[EWorkshop1708]

Stores that sell these in Canada are abundant. They are called donut shops. 😀

LOL

 

[dexter2003]

4x irf450 would be good for 2.6kw or i would need to double them?

 

[rcavictim]

I recently bought a 1500 watt 12 volt to 120 mod sine inverter that appears to be built as the 2.5 kW supply described above in that my unit has 8 banks of two mosfets driving p-p xfmer primary with associated fuse. The mosfets on the transformers are heatsinked on the bottom side of the case as seen in this photo. I must say for a measly 1500 watt inverter this baby is really overbuilt!

In comparison I have a few Xantrex X-Power 1000 watt inverters and they contain only two such transformers of about the same size to make the 160 VDC rails for the output switches.