Power Conversion Electronics

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating of over 0.96,
which, according to some indicators, means it's 96% efficient. (4%
wastage as heat).

Since it's a new unit I dare not to open up the PSU to see what type
of electronics they are using.

So I post the question here ----

Can anyone tell me what type of Power Conversion Electronic Devices
they use in those high PFC rating PSU?

Thank you all !!!

On Sun, 26 Apr 2009 02:20:26 -0700 (PDT), pg
wrote:

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating
of over 0.96, which, according to some indicators,
means it's 96% efficient. (4% wastage as heat).

PFC and efficiency are not the same thing.
http://en.wikipedia.org/wiki/Power_factor_correction
http://en.wikipedia.org/wiki/Energy_...ion_efficiency

On Apr 26, 2:33*am, Ken wrote:
On Sun, 26 Apr 2009 02:20:26 -0700 (PDT), pg
wrote:

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating
of over 0.96, which, according to some indicators,
means it's 96% efficient. (4% wastage as heat).

PFC and efficiency are not the same thing.http://en.wikipedia.org/wiki/Power_f...ion_efficiency

Many thanks for the info !!

pg wrote:

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating of over 0.96,
which, according to some indicators, means it's 96% efficient. (4%
wastage as heat).

Incorrect. It has nothing to do with efficiency.


Since it's a new unit I dare not to open up the PSU to see what type
of electronics they are using.

So I post the question here ----

Can anyone tell me what type of Power Conversion Electronic Devices
they use in those high PFC rating PSU?

Download an application note say from I.R.

Graham

On Sun, 26 Apr 2009 13:09:30 +0100, Eeyore wrote:

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating of over 0.96,
which, according to some indicators, means it's 96% efficient. (4%
wastage as heat).

Incorrect. It has nothing to do with efficiency.

It has *some* effect upon efficiency, but not much.

Nobody wrote:

On Sun, 26 Apr 2009 13:09:30 +0100, Eeyore wrote:

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating of over 0.96,
which, according to some indicators, means it's 96% efficient. (4%
wastage as heat).

Incorrect. It has nothing to do with efficiency.

It has *some* effect upon efficiency, but not much.

Yes, it decreases the overall efficiency of the PSU but increases the
efficiency of the grid !

Graham

On Sun, 26 Apr 2009 02:20:26 -0700, pg rearranged some electrons to say:

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating of over 0.96,
which, according to some indicators, means it's 96% efficient. (4%
wastage as heat).

Since it's a new unit I dare not to open up the PSU to see what type of
electronics they are using.

So I post the question here ----

Can anyone tell me what type of Power Conversion Electronic Devices they
use in those high PFC rating PSU?

Thank you all !!!

0.96 power factor does not mean 96% efficient. But, to answer your
question, active power factor correction means that the front end of the
power supply tries to keep the phase between the voltage and current
waveforms as small as possible.

On Apr 26, 5:32*am, david wrote:
On Sun, 26 Apr 2009 02:20:26 -0700, pg rearranged some electrons to say:

I just purchase a Silverstone Power Supply Unit (PSU) for my PC.

I am amaze with the PFC (Power Factor Correction) rating of over 0.96,
which, according to some indicators, means it's 96% efficient. (4%
wastage as heat).

Since it's a new unit I dare not to open up the PSU to see what type of
electronics they are using.

So I post the question here ----

Can anyone tell me what type of Power Conversion Electronic Devices they
use in those high PFC rating PSU?

Thank you all !!!

0.96 power factor does not mean 96% efficient. *But, to answer your
question, *active power factor correction means that the front end of the
power supply tries to keep the phase between the voltage and current
waveforms as small as possible.

It also tries not to draw any current at harmonics. It is unfortunate
that one term is now used for two effects but we are stuck with it.

On Apr 26, 11:33*am, MooseFET wrote:
It also tries not to draw any current at harmonics. *It is unfortunate
that one term is now used for two effects but we are stuck with it.

Displacement Factor is the fudamental only.

Tim

Tim Williams wrote:

On Apr 26, 11:33 am, MooseFET wrote:
It also tries not to draw any current at harmonics. It is unfortunate
that one term is now used for two effects but we are stuck with it.

Displacement Factor is the fudamental only.

Never heard that term. Can you explain ?

Graham