Building a PFC for 3KW buck-converter

[Vauxdvihl]

haymeron pfc

Hello,
i have got a question !!

Does anybody have some expierience with building a PFC for 3KW buck-converter ???

I am specielly interessed in the three way's to build a PFC !!

I have downloaded all the files from haymeron !!

Thank you

 

[haymeron]

hi.

what is your input voltage?
what is the variation of the input voltage?
what is your minimum load current?
what is your output voltage?

regarsd - haymeron

 

[Vauxdvihl]

Thanks my friend haymeron for your help !!
But it is better when i learn it on my own, how to build a PFC !!!

But thank you very much my friend for your help !!!!!!

CU

 

[haymeron]

On 2001-08-05 15:54, Vauxdvihl wrote:
Thanks my friend haymeron for your help !!
But it is better when i learn it on my own, how to build a PFC !!!

But thank you very much my friend for your help !!!!!!

CU

you will find new stuf in
haymeron-en61000-3-2

regards - haymeron

 

[Guest]

what is PFC ?

 

[Johnnyquest]

PFC stand for Power Factor Correction. Power Factor is the ratio of Working Power to Apparent Power.

 

[ahgu]

I have a input of either 1 phase or 2 phase or 3 phase AC 220V input for my 3kW motor drive.
How can I design a circuit to give me some 12v,-12v, and 5, 3.3v for the controller digital power source?

I also need PFC, but for later, I don't understand why the boost circuit increase PF.

thanks
Ahgu

 

[goodboy_pl]

Hi ahgu!

If required output power is lower than 150W flyback topology is the best choice.

U can design a multi output flyback by
Unitrode current mode controlers:
UC384X X=2,3,4,5
If ur input mains is 220v UC3844 is The best one.
http://www.unitrode.com

 

[goodboy_pl]

HI again!

I forgot something:
if required output power is very low then it is recommended a Transformer-Linear Regulator to be used.This is due to problems in realizing a safe and high quality switching power supply particulary multiple output ones.

if u want to design a switching one see POWERINT website.
http://www.powerint.com/
POWERINT designed some HVICs for offline flyback topology.by using them part count lowers while reliability increases very much!!!
in this site u can find alot of data sheet and app. notes as well as design samples.

 

[Guest]

The link to http://www.unitrode.com only brings you to the Texas Intruments site. Unitrode was bought by TI.
But here the link to the Unitrode Design Seminars that has a lot of info on PFC design and theory.
**broken link removed**

Check the following folders for PFC.
slup087 in sem600
slup103 in sem900
slup106 in sem1000
slup093 in sem700
Also do a search at the above link for:
dn-93e

Hope this helps.

 

[goodboy_pl]

Hi HEXFET !
Thank u for useful links.
about unitrode :though unitrode.com links to TI.COM a large # of unitrode app.notes is available through TI.COM.@ the page u c :
"TI and Unitrode designers are working together right now to develop next-generation power management solutions. If you're looking for power management ICs or easy-to-design-in products that plug right in, you've come to the right place. Our goal is to be the supplier you look to first for premier power management solutions."

u can find some of them below:
**broken link removed**

also u can find PWM app.notes by :
**broken link removed**

some of them are good for the perpose of house keeping power suply design .(as ahgu asked for them.)
i have designed a well working 120 W offline flyback using UC3844 ,but my usefull references are @ powerint.com!.:smile:

 

[lebrit]

Did someone design PFC circuit build on Vienna bridge?

 

[alonso_wen]

Can u kindly give me a copy of ur design.
mrwenlong@sn165.com