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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 !!! |
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Power Conversion Electronics
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 |
#3
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Power Conversion Electronics
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 |
#4
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Power Conversion Electronics
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 !! |
#5
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Power Conversion Electronics
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. |
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Power Conversion Electronics
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. |
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Power Conversion Electronics
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 |
#8
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Power Conversion Electronics
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). 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? Please do not confuse Power Factor Correction (PFC) with power supply efficiency. They are two separate items. PFC can be either active or passive, but usually alters the highly capacitive input of SMPSs. Google "PFC". |
#9
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Power Conversion Electronics
"UCLAN" Please do not confuse Power Factor Correction (PFC) with power supply efficiency. They are two separate items. ** OK so far. PFC can be either active or passive, ** Hmmmm... but usually alters the highly capacitive input of SMPSs. ** TOTAL ******** !!! They are not capacitive, there is no phase angle. Active PFCs correct WAVEFORM distortion. ....... Phil |
#10
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Power Conversion Electronics
On Mon, 27 Apr 2009 12:22:11 +1000, "Phil Allison"
wrote: "UCLAN" Please do not confuse Power Factor Correction (PFC) with power supply efficiency. They are two separate items. ** OK so far. PFC can be either active or passive, ** Hmmmm... but usually alters the highly capacitive input of SMPSs. ** TOTAL ******** !!! They are not capacitive, there is no phase angle. Active PFCs correct WAVEFORM distortion. ...... Phil Take you meds and lie down for a while. What he said was perfectly reasonable. John |
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