If I were to use a 6 pulse bridge rectifier with a choke input LC filter, relative to the AC RMS voltage across each secondary, what DC voltage out would I get:
With delta connected secondaries?
With wye connected secondaries?
With delta connected secondaries?
With wye connected secondaries?
Tweeker,
The ralationship between delta and wye is the square root of 3 (1.73). So if you measure 120 volts from leg to neutral (wye); you will measure 208 volts from leg to leg (delta... or wye for that matter).
The ralationship between delta and wye is the square root of 3 (1.73). So if you measure 120 volts from leg to neutral (wye); you will measure 208 volts from leg to leg (delta... or wye for that matter).
I know 3 phase wye bridge rectified without a choke but capacitor gives 2.45*VAC RMS= VDC, what does it give with a choke? 1.73*.9= 1.56?
With delta connected secondaries, does this mean output with choke would be VAC RMS * .9 = VDC?
What scant information I can find seems to indicate this isnt quite right, choke input polyphase rectifiers seem to be obsolete.
With delta connected secondaries, does this mean output with choke would be VAC RMS * .9 = VDC?
What scant information I can find seems to indicate this isnt quite right, choke input polyphase rectifiers seem to be obsolete.
I will have to look... in a little red book I have...
Wait for tomorrow... I can't promise an answer... I just don't want to give you a BS one.
😀
Wait for tomorrow... I can't promise an answer... I just don't want to give you a BS one.
😀In fact Im pretty sure it isnt * .9, average voltage would be much higher than with single phase.
hey Tweeker,
The average voltage factor is 0.954969. I couldn't find my little red book so I Armstrong-ed it in Excel... PM me if you want the spreadsheet.
Remeber, when you sum the 3 rectified phases the voltages don't add... they merely overlap... only the biggest voltage wins...
OH... this isn't RMS... multply by 1.414
😀
The average voltage factor is 0.954969. I couldn't find my little red book so I Armstrong-ed it in Excel... PM me if you want the spreadsheet.
Remeber, when you sum the 3 rectified phases the voltages don't add... they merely overlap... only the biggest voltage wins...
OH... this isn't RMS... multply by 1.414
😀
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