Well you've 'picked up' wrong, Vrms has nothing to do with a rectified signal - and I find the answer in post #2 a little confusing?.so far I have been picked up that Vrms is the component of a rectified ac signal
This question doesn't make sense. I think you are mistaking the average voltage for DC. The average value of a HALF-rectified waveform is 0.318*Vpeak. The average of a full rectified wave is 0.637. The average value of a rectified wave is not the same as DC.Please tell me more. My main source of confusion is exactly that. Please explain why Vdc and Vrms have different values. Vm stands for Vmax or Vpeak
Well you can't compare peak with RMS, there's no relationship between them. And Vdc and Vrms don't have different values, that's the whole point of RMS. I fail to see how you can even say "Vdc = 0.318Vm", where Vdc is a DC voltage, and Vm is the peak of an AC one?. Who made up Vm?, and why?.Please tell me more. My main source of confusion is exactly that. Please explain why Vdc and Vrms have different values. Vm stands for Vmax or Vpeak
You had better get a good understanding of RMS, or you are in for a rough, tough ride in the electrical field.I am a second year electrical Engineering student and so far I have been picked up that Vrms is the component of a rectified ac signal that will deliver the same power as dc. But now I am told that Vdc = 0.318Vm and Vrms =0.707 which is not the same. Confused.
Except no one specified sinewaves, as I said there's no relationship between peak and RMS, other than for exact individual ones - it doesn't need to be a sinewave, in can be any wave as long as it never changes, but each wave will have a different relationship.Nigel Goodwin I think said it best, although I disagree with his statement
The rms value of a sine wave is 0.707 x the peak value, that is the relationship.
A couple of errors in that statement:320VAC peak to peak = 230VAC RMS
Should sayVAC peak to peak /square root of 2 = VAC RMS