Power Factor Corrector, PFC:
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Hello Guido,
I have noted that you and Dave endorse Jeff Rowland PFC with emphasis on 385 DC voltage. However, this is not "real" voltage.
The PFC allows the power supply to draw a sinusoidal current from the mains. This will reduce electrical pollution and highly spiked currents that can generate undesirable harmonics from the amplifier to the other equipment. Consequently, the PFC minimizes the harmful electrical and nasty audible effects of many older traditional power supply designs. Also, the PFC reduces the need for filtering; Finally, there must be a small energy storage capacitor which may or may not be used for energy storage. These are positives of PFC.
The PFC output is, indeed, 380 to 400VDC but it is NOT isolated from ground i.e. - you touch it - you dead (DEAD). To isolate it from ground, requires a DC:DC converter which has a transformer isolation. The output voltage from Dc:Dc is a "real" voltage and you better ask your favorite manufacturer what is it and much more importantly - is it regulated. In other words PFC is semi-regulator and DC:DC converter, in theory, can be fully regulated. In traditional liner power supplies, the partial regulation can be better then PFC - its not easy but best linear power supply have it....
If you want to share with us what Jeff Rowland does with PFC output then it will be very interesting.
Thank you in advance.
All The Best
Rafael
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Hello Guido,
I have noted that you and Dave endorse Jeff Rowland PFC with emphasis on 385 DC voltage. However, this is not "real" voltage.
The PFC allows the power supply to draw a sinusoidal current from the mains. This will reduce electrical pollution and highly spiked currents that can generate undesirable harmonics from the amplifier to the other equipment. Consequently, the PFC minimizes the harmful electrical and nasty audible effects of many older traditional power supply designs. Also, the PFC reduces the need for filtering; Finally, there must be a small energy storage capacitor which may or may not be used for energy storage. These are positives of PFC.
The PFC output is, indeed, 380 to 400VDC but it is NOT isolated from ground i.e. - you touch it - you dead (DEAD). To isolate it from ground, requires a DC:DC converter which has a transformer isolation. The output voltage from Dc:Dc is a "real" voltage and you better ask your favorite manufacturer what is it and much more importantly - is it regulated. In other words PFC is semi-regulator and DC:DC converter, in theory, can be fully regulated. In traditional liner power supplies, the partial regulation can be better then PFC - its not easy but best linear power supply have it....
If you want to share with us what Jeff Rowland does with PFC output then it will be very interesting.
Thank you in advance.
All The Best
Rafael