Hello, my name is Monika Little and I’m an Application Engineer at the Keysight Technologies.
I’m here today to present our new IntegraVision Power Analyzer.
For that reason, we built together demo kit board, which has on it several devices as
you can see.
What we evaluate here today is DC/AC inverter.
For that reason, we need to feed it the DC 12-volt signal and on output we’ll do it
with this battery charger.
So our device on the test is DC/AC inverter and we will connect on each side with our
power channels.
So I will make the connections now.
So yellow is my first power channel, so this is my direct current measurement.
And this is my voltage measurement for the first power channel.
So that one is on the input of the DC/AC inverter, so that will be the DC signal.
Now, this is my second power channel.
Again, direct current measurement and voltage measurement on the second power channel.
So first, I have to check if I have properly set my inputs.
Internal input is on 2-amp because we have 2 amps and 50 amps direct input.
When I have it set properly, now I can go to out of scale just to make it quick and
easy.
Out of scale will obviously figure out by itself in which scales I measure.
It also helps to switch on the board.
Now I can go to out of scale again.
So the yellow, as we started, is the first channel.
Green is the second channel.
So on first channel, I have the DC signal obviously.
This is my DC voltage, this is my DC current, and my DC power.
On the green, that’s my AC side.
As we can see, this small inverter is producing pretty chopped AC voltage and as I am loading
it with battery charger, this battery charger is drawing these very sharp, narrow peaks
current.
That’s the green and this is the power.
So now, I evaluated that my signals are pretty much where I expected them.
Next probably would be to go analyze my signals.
So first I have to set up when I want to go to power quality, the whole cycle analysis
mode.
It has to be synchronized to either the AC signal or the line, so it can find aegis.
Once I have it synchronized, now I have power quality of first channel and simultaneously
I can also power quality of second channel.
So power quality means it’s all different voltages: AC, DC voltages, currents, power,
reactive power, power factor, phase angle, and also I can measure the high crest factor.
From there, I can go and since I see I have power going through both input and output,
I can see what efficiency this inverter is operating with.
At this point, its 40 percent.
It’s not very high.
It’s probably because we are only loading it with battery charger, which is drawing
not very high current from there.
If I am interested, I can find out how much energy I’m consuming and power charge that
has to be started extra to the measurement.
Its default setting to ten seconds but it can be changed if I want to observe it for
longer time, for an hour, whatever is the right cycle for me to observe.
And last, not least, I can go observe and evaluate harmonics as we’ve seen the signal
that we are drawing, the current on the AC side is very choppy.
So let’s look at the current, second current analysis.
I can change my views; I can everything in one screen if I want to.
I have the graph and the numerical values of the harmonics and I also see total harmonic
distortion – it’s pretty high as we commented, we have a lot of harmonics as we can see.
And if I wanted to see just what is my 13 or 14 or whatever, I just touch it and it
will let me know what is the harmonics here.
Thank you.