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Topic Title: 3 phase bridge rectifier
Topic Summary: Current formula for 3ph bridge rectifier
Created On: 26 July 2011 03:45 PM
Status: Read Only
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 26 July 2011 03:45 PM
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GMAC

Posts: 64
Joined: 12 September 2006

Does anyone know the factor that can be applied to the 3 phase current input of a 3 phase bridge rectifier to determine what the DC current output will be, in order to size the wiring connected to the DC output terminals?
For example if the 3ph input current is 22Aac what would be the effective DC current output I would use to size the DC output wiring?
 26 July 2011 06:22 PM
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ArthurHall

Posts: 735
Joined: 25 July 2008

for half wave single phase the DC current = 0.318 X Peak AC current
Full wave single phase the DC current = 0.635 X Peak AC current
Full wave three phase the DC current = 0.955 X peak AC current.

therefore
22A /0.707 x 0.955 = 29.7A
 27 July 2011 08:22 AM
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GMAC

Posts: 64
Joined: 12 September 2006

Thank you Arthur.
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