PicoScope 7 Software
Available on Windows, Mac and Linux
3 phase power measurment using 4824
3 phase power measurment using 4824
I am trying to use picoscope 4824 to measure inverter efficiency . that means 2 channels for DC voltage and current ( inverter Input)and 3 channels for AC voltage and 3 channels for AC currents (O/p).
I would like to know How this can be achieved using math channels .
Also I need to transfer these values to a NI Lab view is there any Libraries which can do this .
Your help is appreciated
Thanks
Riaz
I would like to know How this can be achieved using math channels .
Also I need to transfer these values to a NI Lab view is there any Libraries which can do this .
Your help is appreciated
Thanks
Riaz
Re: 3 phase power measurment using 4824
We do have this for single phase power measurements for both PicoScope 6 and LabVIEW. See below.
We have not done this for 3 phase power measurements, you will find maths formula and examples on the internet, if you wish to do so.
Doing this with PicoScope 6 may become busy, visually as you can only have 8 channels/maths channels per 'view'
NI offers a Electrical Power Toolkit at addition cost, see- https://www.ni.com/en-gb/shop/select/la ... er-toolkit
You need to contact them to see what features it offers.
PicoScope 6-
See- topic21771.html?&p=141817&hilit=power+factor#p141722
LabVIEW-
I have created a sub vi for calculating all power, voltages, currents, and power factor, but only for single phase. See code below.
The sub vi is in \PicoScope.llb\VoltsAmpsVectors.vi
https://github.com/picotech/picosdk-ni- ... oScope.llb
This vi calculates the following from a number of periods of you signal.
-RMS (voltage, current)
-Impedance
-Power factor
-VA, VAR, Real Power
and more.
So the values are returned are calculated from number of samples or time period of your capture.
So the more periods of the waveform you feed in will return the resulting values calculated over those cycles.
block mode examples-
Once you have the block example working you can add VoltsAmpsVectors.vi.
Streaming mode examples-
If you wish to use a current streaming example with the VoltsAmpsVectors.vi, you may wish to create a circular buffer that is a fixed size before values are calculated over fixed time period.
As the streaming mode the number of returned samples in the buffers is not always same.
We have not done this for 3 phase power measurements, you will find maths formula and examples on the internet, if you wish to do so.
Doing this with PicoScope 6 may become busy, visually as you can only have 8 channels/maths channels per 'view'
NI offers a Electrical Power Toolkit at addition cost, see- https://www.ni.com/en-gb/shop/select/la ... er-toolkit
You need to contact them to see what features it offers.
PicoScope 6-
See- topic21771.html?&p=141817&hilit=power+factor#p141722
LabVIEW-
I have created a sub vi for calculating all power, voltages, currents, and power factor, but only for single phase. See code below.
The sub vi is in \PicoScope.llb\VoltsAmpsVectors.vi
https://github.com/picotech/picosdk-ni- ... oScope.llb
This vi calculates the following from a number of periods of you signal.
-RMS (voltage, current)
-Impedance
-Power factor
-VA, VAR, Real Power
and more.
So the values are returned are calculated from number of samples or time period of your capture.
So the more periods of the waveform you feed in will return the resulting values calculated over those cycles.
block mode examples-
Once you have the block example working you can add VoltsAmpsVectors.vi.
Streaming mode examples-
If you wish to use a current streaming example with the VoltsAmpsVectors.vi, you may wish to create a circular buffer that is a fixed size before values are calculated over fixed time period.
As the streaming mode the number of returned samples in the buffers is not always same.
Regards Andrew
Technical Specialist
Technical Specialist