power factor correction circuits wanted

[Razor's Edge]

Hi all,

I'm looking for different circuits which perform the power factor correction
in smps designs.
Most of interest, is the active pfc type which in principle is a step-up
converter in the middle of the mains rectifier bridge and the large
electrolyte.
In other words, sources of information with contents regarding active pfc
design is highly appreciated,
schematics, components, design-methods and so on will be fine.
Since the regulations here in Sweden, forces us to use pfc, I must implement
this in my coming designs.
Powerlevels from 50W beyond 2kW!

Best regards
Stefan

 

[John Fields]

Hi all,

I'm looking for different circuits which perform the power factor correction
in smps designs.
Most of interest, is the active pfc type which in principle is a step-up
converter in the middle of the mains rectifier bridge and the large
electrolyte.
In other words, sources of information with contents regarding active pfc
design is highly appreciated,
schematics, components, design-methods and so on will be fine.
Since the regulations here in Sweden, forces us to use pfc, I must implement
this in my coming designs.
Powerlevels from 50W beyond 2kW!

---
http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=Power+factor+control&btnG=Google+Search

yields over two million hits.

Perhaps you might find something of interest there?

 

[Razor's Edge]

John,

For god sakes, you must be kidding me.. .. .. .. .. ....

Of course, I've done numerous of searches and checked lots of ic's and so on
for the task, what do you think??
But maybe there are somebody in this cute NG who's got valueable info or has
designed such a circuit himself.

Oh well......

--- Stefan

 

[Bill Sloman]

John,

For god sakes, you must be kidding me.. .. .. .. .. ....

Of course, I've done numerous of searches and checked lots of ic's and so on
for the task, what do you think??
But maybe there are somebody in this cute NG who's got valueable info or has
designed such a circuit himself.

Oh well......

--- Stefan









http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=Power+factor+control&

John Fields models himself on the Microsoft help desk, though there doesn't
seem to be a knowledge database in his system.

I poked around looking at power factor correction circuits a few years ago,
and at that time there seemed to be one standard circuit, and a couple of
different high voltage ICs to implement it. I did find one academic paper
proposing a different scheme which avoided the high voltages. None of this
lead to the construction of any hardware, so I haven't got any useful
information to pass on, any more than John has.

 

[legg]

Hi all,

I'm looking for different circuits which perform the power factor correction
in smps designs.
Most of interest, is the active pfc type which in principle is a step-up
converter in the middle of the mains rectifier bridge and the large
electrolyte.
In other words, sources of information with contents regarding active pfc
design is highly appreciated,
schematics, components, design-methods and so on will be fine.
Since the regulations here in Sweden, forces us to use pfc, I must implement
this in my coming designs.
Powerlevels from 50W beyond 2kW!

Best regards
Stefan

You'll find that most PFC circuits are application-specific. Their
suitability is determined by the requirements in each case.

- load classification and industry sector
- applicable standard (and rev)
- input voltage range
- power level
- application environment
- mfring volume and cost sensitivity
- end-user-specified bells and whistles (may include such basic
requirements as size and weight but may extend to a variety of
esoteric features that even the specifier is unwilling/unable to
explain or modify).

There are a number of references that examine current topologies.

"A Topology Survey of Single-Stage Power Factor Corrector
with a Boost Type Input-Current-Shaper"
Chongming Qiao and Keyue M. Smedley
http://www.eng.uci.edu/~smedley/APEC00_SMEDLEY_PFC.PDF

"Some Topologies of High Quality Rectifiers,"
R. W. Erickson,
http://ece-www.colorado.edu/~rwe/papers/EPMC97.pdf

"Generalized topologies of single-stage input-current-shaping
circuits,"
L. Huber, J.Zhang, M. M. Jovanovic, and F. C. Lee
http://www.deltartp.com/dpel/dpelconferencepapers/PESC00-generalized topologies ss.pdf

"Comparative Study of Power Factor Correction Converters
For Single Phase Half-Bridge Inverters"
Gui-Jia Su, Donald J. Adams, Leon M. Tolbert,
http://www.ece.utk.edu/~tolbert/publications/pesc2001.pdf

You should be able to find more information, on both active and
passive methods, on the web. You should examine your application to
identify just what is important, before picking a topology.

RL

 

[John Smith]

Hi all,

I'm looking for different circuits which perform the power factor correction
in smps designs.
Most of interest, is the active pfc type which in principle is a step-up
converter in the middle of the mains rectifier bridge and the large
electrolyte.
In other words, sources of information with contents regarding active pfc
design is highly appreciated,
schematics, components, design-methods and so on will be fine.
Since the regulations here in Sweden, forces us to use pfc, I must implement
this in my coming designs.
Powerlevels from 50W beyond 2kW!

Best regards
Stefan

Hi, Stefan.

I suggest you contact your favorite IC manufacturer. They usually have many
application notes and ICs for power factor correction. Here is one such:

http://us.st.com/stonline/bin/hilit...docs/3727.htm&words="POWER+FACTOR+CONTROLLER"

(AN510 by ST Microelectronics using L4981 IC, goes to 3kW). Get the PDF
file.


Good luck.

John

 

[John Fields]

John,

For god sakes, you must be kidding me.. .. .. .. .. ....

---
What makes you think that? If you spend any time around here you'll
inevitably run across idiots who are too damned lazy to do anything for
themselves and want everything handed to them on a silver platter. If
that's not you, fine.
---

Of course, I've done numerous of searches and checked lots of ic's and so on
for the task, what do you think??

---
I think you should have included that information in your first post in
order to establish a baseline.
---

But maybe there are somebody in this cute NG who's got valueable info or has
designed such a circuit himself.

---
I have an article from the March 7,1996 issue of EDN's product edition
entitled "Power Factor Correction What does it do? How does it do it?
Why is it important?", and If you like I'll scan it and post it to
alt.binaries.schematics.electronic.

Or, for a good laugh, you can read Bill Sloman's valuable post about how
he can't help.

 

[Harry Dellamano]

You could at least mention John F.

harry

 

[Harry Dellamano]

You'll find that most PFC circuits are application-specific. Their
suitability is determined by the requirements in each case.

- load classification and industry sector
- applicable standard (and rev)
- input voltage range
- power level
- application environment
- mfring volume and cost sensitivity
- end-user-specified bells and whistles (may include such basic
requirements as size and weight but may extend to a variety of
esoteric features that even the specifier is unwilling/unable to
explain or modify).

There are a number of references that examine current topologies.

"A Topology Survey of Single-Stage Power Factor Corrector
with a Boost Type Input-Current-Shaper"
Chongming Qiao and Keyue M. Smedley
http://www.eng.uci.edu/~smedley/APEC00_SMEDLEY_PFC.PDF

"Some Topologies of High Quality Rectifiers,"
R. W. Erickson,
http://ece-www.colorado.edu/~rwe/papers/EPMC97.pdf

"Generalized topologies of single-stage input-current-shaping
circuits,"
L. Huber, J.Zhang, M. M. Jovanovic, and F. C. Lee
http://www.deltartp.com/dpel/dpelconferencepapers/PESC00-generalized topologies ss.pdf

"Comparative Study of Power Factor Correction Converters
For Single Phase Half-Bridge Inverters"
Gui-Jia Su, Donald J. Adams, Leon M. Tolbert,
http://www.ece.utk.edu/~tolbert/publications/pesc2001.pdf

You should be able to find more information, on both active and
passive methods, on the web. You should examine your application to
identify just what is important, before picking a topology.

RL

Hey RL, All good stuff.
I have an extra bedroom, why not come stay for a few weeks.
Ah, just a thought!!

harry

 

[Razor's Edge]

Harry,

Just a thought??? I've already started to pack my bags.........
Couldn't say no to such an offer!!!!

Regards
Stefan

 

[Razor's Edge]

John,

Sure I would like to see the schematics,
if you've got the time to do it, of course.

--- Stefan

 

[Bill Sloman]

---
What makes you think that? If you spend any time around here you'll
inevitably run across idiots who are too damned lazy to do anything for
themselves and want everything handed to them on a silver platter. If
that's not you, fine.
---


---
I think you should have included that information in your first post in
order to establish a baseline.
---


---
I have an article from the March 7,1996 issue of EDN's product edition
entitled "Power Factor Correction What does it do? How does it do it?
Why is it important?", and If you like I'll scan it and post it to
alt.binaries.schematics.electronic.

Or, for a good laugh, you can read Bill Sloman's valuable post about how
he can't help.

John - possibly deliberately, though he is pretty stupid - missing the
point that my post was in fact apologising for his boorish and
unhelpful behaviour. For someone with very little to contribute, he is
very free with posts telling people that they should have posted more
detail, or google the answer for themselves.

He obviously hasn't got a clue about power factor correction, and is
too much the loud-mouthed redneck to let this inhibit his braying. I -
almost unavoidably - know more than he does about pfc, but not enough
to give useful advice, for which I took the trouble to apologise.

 

[Fred Bloggs]

John - possibly deliberately, though he is pretty stupid - missing the
point that my post was in fact apologising for his boorish and
unhelpful behaviour. For someone with very little to contribute, he is
very free with posts telling people that they should have posted more
detail, or google the answer for themselves.

He obviously hasn't got a clue about power factor correction, and is
too much the loud-mouthed redneck to let this inhibit his braying. I -
almost unavoidably - know more than he does about pfc, but not enough
to give useful advice, for which I took the trouble to apologise.

Well- let the OP post some representative specs and then JF can reply
with a sample design- organizing all the pertinent equations in a nice
neat tabulated display to show how simple and straightforward it all is.

 

[Nico Coesel]

Hi all,

I'm looking for different circuits which perform the power factor correction
in smps designs.
Most of interest, is the active pfc type which in principle is a step-up
converter in the middle of the mains rectifier bridge and the large
electrolyte.
In other words, sources of information with contents regarding active pfc
design is highly appreciated,
schematics, components, design-methods and so on will be fine.
Since the regulations here in Sweden, forces us to use pfc, I must implement
this in my coming designs.
Powerlevels from 50W beyond 2kW!

Looking into patents may help to get an idea what other people already
cooked up. The patents with test results are the most interesting
ones.

Anyway, what is the minimum angle you need to comply to?

 

[John Fields]

John - possibly deliberately, though he is pretty stupid - missing the
point that my post was in fact apologising for his boorish and
unhelpful behaviour. For someone with very little to contribute, he is
very free with posts telling people that they should have posted more
detail, or google the answer for themselves.

He obviously hasn't got a clue about power factor correction, and is
too much the loud-mouthed redneck to let this inhibit his braying. I -
almost unavoidably - know more than he does about pfc, but not enough
to give useful advice, for which I took the trouble to apologise.

---
Hogwash.

All you were doing was taking a swipe at me.

If, in fact, you were taking the trouble to apologize for not being able
to give useful advice I suspect the rest of your apologies along those
lines would quickly saturate Usenet!

 

[John Fields]

Well- let the OP post some representative specs and then JF can reply
with a sample design- organizing all the pertinent equations in a nice
neat tabulated display to show how simple and straightforward it all is.

---
Sorry, boys, it doesn't work like that. I volunteer when I feel like
helping or feel I _can_ help, not when some thug tries to force me into
it.

Funny, though, Sloman starts throwing names around and up rear ugly
heads!

 

[Jim Thompson]

---
Sorry, boys, it doesn't work like that. I volunteer when I feel like
helping or feel I _can_ help, not when some thug tries to force me into
it.

Funny, though, Sloman starts throwing names around and up rear ugly
heads!

Hey, John, Relax, It's only Fred ;-)

...Jim Thompson

 

[Harry Dellamano]

Harry,

Just a thought??? I've already started to pack my bags.........
Couldn't say no to such an offer!!!!

Regards
Stefan

Stefan,
RL is the man, you on the other hand would have to bring more than just
your razor to make the stay worth while.

regards
harry

 

[Razor's Edge]

he he ..... yep, I noticed my little mistake later....

Since I now see the offer wasn't for me, I'll have to unpack my bags, and
drink all the beer myself...... ;-)

Regards
Stefan

 

[Jim Thompson]

A lot of ISPs won't accept that size of E-mail. For example, Cox
Cable limits you to 2MB (inbound).

John, Can you put it up on your website? If not, drop me an E-mail
and I'll provide you a private FTP. I'll then move it to a public
area on my website.

...Jim Thompson