Question regarding implementation of 3-phase power metering based on FFT metering libraries, deciding whether to use qt timer based U-I phase shift compensation or software based.
- Looking at AN5007 section 6.2 there is a FFT sample process
- how to trigger SD conversion (312us interval)?
- is there additional delay needed between SD triggering for each phase as in Figure 5.?
- In case we use software based U-I phase shift compensation
- how to fill phase-shift correction buffer for METERLIBFFT3PH_InitMainBuffPhX?
- is it ok to calculate phase shift correction based on power factor during calibration
process and use same value for each harmonic in buffer?