power factor correction...

Thread Starter

dolphi

Joined Dec 27, 2008
5
Hi all...
How boost converter s used for power factor correction after rectification...?? Could anybody here pls explain me ths concept.... am very mush confused.... after rectifying an ac supply to dc, how will the boost converter helps in correcting power factor...??:confused:
 

gotumal

Joined Mar 24, 2008
99
dolphi means power factor of a system; cosine of the angle between current and voltage.
 

thingmaker3

Joined May 16, 2005
5,073
"Power factor" implies AC. "Rectification" and "boost converter" imply DC.

The question seems to be about rectified & filtered higher voltage lower current -vs- rectified & boosted lower voltage higher current. Is power factor of the primary different between these two. If so why?
 

n9352527

Joined Oct 14, 2005
1,198
I think the poster asked why boost converter is often used in PFC stage of a SMPS. It is a common design approach to use a first stage boost converter in a largish SMPS to improve the overall PF of the SMPS.
 
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