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How to design a unity power factor AC-DC Converter

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satyakumar

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Hi,
Is it possible to design unity power factor AC-DC power converter
 

It is very difficult to design a converter with PF exactly equals to 1, but you can design a AC-DC converter with power factors a little less that one, e.g. PF = 0.98.

To design such converter, you must use a PFC (power factor correction) unit in the first stage of your converter:

AC line ---------> PFC-------------> converter

Please give more detail information about the converter you need:
Input AC voltage:?
Output DC Voltage:?
Output Power:?
 

Yes it is possible to convert ..... but not exactly unity little less than unity....

some ships ara vailable at fairchild semiconductors . for eg: ML4821 chip can be used for building teh unity pf ac to dc converter...
 

i dotn think we can attain the unity power factor
as there will be tolerances in the componenets used
but you can achieve a little less then unity almost .98 and .99
i am using a pfc ic of texas make ucc2818d
and a lot of ics are available
but you should use it after the bridge as the first stage

bye
som
 

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