What is the difference between AC and DC average rms and peak values?

Answer 1

RMS minus ripple current , that is alternating current (sinusoidal wave form )it is including ripple voltage and ripple current . peak current is maximum peak in sinusoidal wave form . general used in choke (filter ) design calculation .

Answer

How do you compare the 'speed' of a circular saw with that of a reciprocating saw? One spins, while the other goes up and down. The answer is that you compare them, not in terms of their individual speeds, but in terms of their 'cutting speeds' (i.e. how fast they cut board).

We do the same thing with a.c. and d.c. We compare one with the other in terms of the 'work' they do. So, for example, a 10-A (r.m.s.) a.c current will do precisely the same amount of work as a 10-A d.c. current.

So the r.m.s. value of an a.c. current is exactly equivalent to the value of a d.c. current that will achieve the same amount of work. Because voltage is proportional to current, the r.m.s. value of an a.c. voltage and a d.c. voltage are also equivalent to each other.

For a sinusoidal a.c. current or voltage, the r.m.s. value is 0.707 times the peak value.

Answer 2

RMS value :- it is defined as the square root of the mean of the squares of various values at various time intervals.

VRMS = [(V12+V22+V32+V42+V52.........+VN2)/N]1/2

for Dc source as V1=V2=V3=V4=V5.........=VN =V

VRMS=V

for AC it would be different like if you consider sinusoidal signal then VRMS = (2/pi)1/2 V

where V is the max. amplitude of sine wave.

Peak value :-

amplitude AC signal it varies from -V to +V

where as in DC signal it is always constant V

Average value:-

for AC source :- the avg value for a periodic signal with period T is found by integrating the signal from 0 as lower limit to T/2 as upper limit and then divide the result by T/2

for Dc source :- the avg. value is V itself as it does not fluctuate