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Bridge rectifier formula
2 Attachment(s)
A post on SED asked for a formula to calculate the available DC output current
from a bridge rectifier given the transformer AC current rating. The attachment shows the derivation of a formula. In real circuits, you will get a higher DC output current than this formula predicts due to clipping of the grid waveform and due to leakage inductance. A formula covering those cases would be too complicated for practical use, but the formula ignoring those effects, given in the attachment, is a good starting point. This .gif file can be viewed conveniently in Firefox. Place the cursor over the image and right click to magnify. -------------------------------------------------- This repost is because of a factor of SQRT(2) I left out of the last line. I've also split it into two parts for easier viewing. |
Bridge rectifier formula
On 21 Jul 2008 13:29:02 -0500, The Phantom wrote:
A post on SED asked for a formula to calculate the available DC output current from a bridge rectifier given the transformer AC current rating. The attachment shows the derivation of a formula. In real circuits, you will get a higher DC output current than this formula predicts due to clipping of the grid waveform and due to leakage inductance. A formula covering those cases would be too complicated for practical use, but the formula ignoring those effects, given in the attachment, is a good starting point. This .gif file can be viewed conveniently in Firefox. Place the cursor over the image and right click to magnify. -------------------------------------------------- This repost is because of a factor of SQRT(2) I left out of the last line. I've also split it into two parts for easier viewing. Thank you! |
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