PIC18F1320 Coding to measure power factor

hm859 · Joined: 17 Jul 2009 Posts: 1 Location: UK

I am going to design a microcontroller based AC Power meter.
Now I am able to measure and display the voltage and current by using PIC18F1320.
But I am in trouble, how to measure the power factor (determining the phase difference between the voltage and current wave).
Can anyone help me please how do that PIC18f1320 coding to determine the power factor?

robomaniac · Posted: Fri Jul 17, 2009 12:42 pm

Your in the UK, so it is 220V and 50Hz

Check this website
http://jarv.org/pwrmon.shtml

Here is a good pdf
http://www.xantrex.com/web/id/341/DocServe.aspx

and here is a example
http://openbookproject.net//electricCircuits/AC/AC_11.html#xtocid82073

Power Factor = Real Power / Apparent Power
_________________
Jérôme Demers
www.jeromedemers.com