Is there a way to find out what my dc voltage should be from ac to dc without putting a diode in line.?

Question

what i am trying to do is i have 6v ac coming out of a motor turning the shaft i want to know if there is a way to calculate what my dc voltage is going to be without going and putting a diode or rectifier in line

Answer 1

Sure. But without current drain numbers all I can give you is the maximum.

6 VAC RMS has a peak voltage of 1.4 x 6 = 8.4 volts, which means if you have a half wave rectifier with a capacitor, you will get this voltage minus one diode drop, or 7.8 volts.

With a full wave bridge and a capacitor, you will get 8.4 volts minus 2 diode drops or about 7.2 volts.

With no capacitor, the voltage will be about 2.5 volts with one diode or about 5 volts with a bridge.

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Answer 2

for CT or Bridge FWR, VDC = VAC x 0.9

for HWR, VDC = VAC x 0.45