AnsweredAssumed Answered

Phase error with ADE7880 and Rogowski coils

Question asked by LoreBart on Jan 16, 2018
Latest reply on Jan 18, 2018 by ValeriaToff

Hello,

I'm using an ADE7880 for a university project. The current sensors are Rogowski coils, therefore I turned on the digital integrator as explained in datasheet (DICOEFF and CONFIG registers). To calibrate the device, I used a single phase calibrator and I saw that measured phase is wrong: there is an error of about 6 degrees. To find the source of error I turned off the integrator and I imposed, with calibrator, a current with -90° phase angle (to compensate Rogowski coils); I saw that in this case there aren't any phase errors. Why the digital integrator introduces these errors?

Outcomes