TEST #5 : New efficiency measurements with a digital oscilloscope with more power
created on december 28, 2012 - JLN Labs - last update january 4, 2013
All informations and diagrams are published freely (freeware) and are intended for a private use and a non commercial use.
Toutes les informations et schémas sont publiés gratuitement ( freeware ) et sont destinés à un usage personnel et non commercial
Cliquez ici pour la version FRANCAISE
January 3, 2013 - TEST #5 : Here a new serie of power I/O measurements with a digital oscilloscope, this serie of measurements is the following the previous TEST#2. The two scope probes are set to X10 and are connected to the flat bifilar coil output. The probe Ch1 is used to measure the voltage accross the flat bifilar coil output and the probe Ch2 is used to measure the current i.e. the voltage accross a 0.1 Ohm non inductive resistor Mundorf MR10 10W. Then the datas are sent to a datasheet to compute true RMS values and the efficiency. The electrical power input of the induction cooker is measured with a Wattmeter Energy Logger 4000F directly connected on the power grid.
In this new test, I have added more power at the OUTPUT by adding more halogens lamps, there are :
The TOTAL POWER connected at the OUTPUT of the GEGENE is 3550 Watts
Below the setup of the TEST #5:
TEST #5 RESULTS :
Of course, the voltage, the current and the power are true RMS values...
Unlike to the previous TEST2, I have choosen a wider time scale so as to include the pulsation of the power.
You may download the full datas of the digital scope HERE
Here a zoom on the voltage and the current, there is no inductive effect here.
Here the accurate measurements of the non inductive resistor Mundorf MR10 of 0.1 ohm 10W. The true value is 0.09 Ohm.
The electrical power for the induction cooker is measured with a Wattmeter Energy Logger 4000F directly connected on the power grid :
The Wattmeter measures 1805 Watts at the INPUT, this is in line with the 2000 Watts programmed on the induction cooker.
So, the true RMS voltage and the true RMS current computed with the datas measured with the digital oscilloscope are :
Here a video of the tests of the GEGENE at full power
New measurements (4 january) done with the digital scope with a time base of 500 µs/div and 100 MSa (full scope datas here)
The electrical input power of the induction cooker measured with the Wattmètre Energy Logger 4000F on the power grid is 1900 Watts
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