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Building a PFC for 3KW buck-converter

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Vauxdvihl

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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

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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

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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

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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
 

Johnnyquest

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

ahgu

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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

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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

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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.
 

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goodboy_pl

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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:
http://focus.ti.com/docs/prod/applicationnotes.jhtml?templateId=2&familyId=64


also u can find PWM app.notes by :
http://www.ti.com/sc/docs/apps/analog/pwm_power_supply_productsapp.html

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

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Did someone design PFC circuit build on Vienna bridge?
 

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