RMS - tutorial ...HI
i have a question about rms
rms = 0.7 vp
where (0.7) come from
is it depend on frequencies 50/60 hz ?
like PWM when we vary duty cycle we obtain different value of volts
but here we vary frequencies
thanks
i have a question about rms; rms = 0.7 vp; where (0.7) come from
I see now there are more and more to learn ...
......
Coming back to the original question; if you specify the RMS value of a given but random waveform, you get some idea about the waveform..
... But in electrical engineering, the RMS value is the most important - it is related to the power or energy.
But that is a different area altogether.
Coming back to the original question; if you specify the RMS value of a given but random waveform, you get some idea about the waveform.
But if you know all the values of the generalized means (sum over one cycle (x(t))^n) you get to know the complete waveform.
But in electrical engineering, the RMS value is the most important - it is related to the power or energy.
But that is a different area altogether.
It's like measuring the size of your feet to find out how tall you are. For many people you may find a good relationship...
..
Coming back to the original question; if you specify the RMS value of a given but random waveform, you get some idea about the waveform.
But if you know all the values of the generalized means (sum over one cycle (x(t))^n) you get to know the complete waveform.
.....
Yes, you can see a paper by a real mathematician here:
https://www.improbable.com/2016/01/15/facilitating-the-perfect-golden-ratio-eyebrow-new-patent/
Of course this is a joke but the point should not be missed.
HI
i have a question about rms
rms = 0.7 vp
where (0.7) come from
is it depend on frequencies 50/60 hz ?
like PWM when we vary duty cycle we obtain different value of volts
but here we vary frequencies
thanks
Actually the factor is the ratio of integrated voltage waveform in one cycle to the total area in one cycle...
For a sine wave, both the quantities, integrated voltage waveform in one cycle AND the total area in one cycle are ZERO.
see, for example, https://www.wolframalpha.com/input/?i=integral+of+sin(x)+from+0+to+2*pi
In fact, both these are ZERO for any symmetrical waveform.
For a sine wave, both the quantities.......are ZERO for any symmetrical waveform.
Note that the total area is (Vpk * one_period). ...
No, remember that when we say negative, we imply the direction of flow of current...
Integrating the voltages, as well as integrating the absolute_value_of_voltage can never lead to RMS.So when integrating, integrate the absolute values. This would give 2 times what you get for a half cycle but not zero.
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