Hi...
I'm trying to determine effective power consumption by integration, over a complete cycle at 50Hz,
and not over 1 second (as it is in the majority, if not all, oscilloscopes) .
The video "How & Why to use Integration on an Oscilloscope" from Dave
was very elucidate but there is something I'm still missing.
Scope screenshot is at:
photobucket.com/gallery/user/miguelgpbs/media/bWVkaWFJZDoxMzAzNTk3NTQ=/?ref=
anyway, the image is also attached here...
I'm using a Rigol DS1054z
* Yellow (CH1) : Mains sine wave voltage, 230Vac rms 50Hz
* Cyan (CH2) : Current, measured through a 1 ohm series resistor.
* Purple : Voltage (Yellow CH1) times Current (Cyan CH2) math function to compute power
* Red vertical lines are the imposed area of measurement
As the current is an irregular waveform, consequently the power is also a irregular one.
To integrate this irregular power waveform over a complete cycle, I used the area measurement function of this oscilloscope,
confined between the red lines (this gives me immediately the final integrated value) .
The result value for the integration (area calculation) was 152mWs (green bordered at bottom right side).
Question is:
The 152mWs, as the unit of measurement itself states (mWs), is valid for a time of 1 second.
So, as long as I understood, this result is not the effective power for a 50Hz frequency.
Given this, how to calculate the effective power consumption, from the result 152mWs, for the
power waveform (Purple) over a complete 20ms cycle (50Hz) ?
Thanks in advance,
Miguel Garcia