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Overunity Machines Forum



Value of a leveling cap on the backside of a full wave bridge?

Started by rukiddingme, June 24, 2014, 11:11:58 PM

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rukiddingme

June 24, 2014, 11:11:58 PM
How do you determine the best value of a leveling cap on the backside of a full wave bridge?


In this case, 12 volts 1.5 amps DC.

MarkE

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June 25, 2014, 12:22:19 AM
The usual method is to determine the acceptable voltage droop, half cycle to half cycle.

The droop is approximately: VDROOP ~= ILOAD/(C*2*F)

The shortcut is: 8,333uF*Volts / Amp at 60Hz, or 10,000uF*Volts / Amp at 50Hz.

At 1.5A you need 12,500uF for 1V droop, 6,250 if you can tolerate 2V droop, 3,125uF if you can tolerate 4V droop etc.

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