Current distortion after 1A? (powermeter project)

Discussion in 'The Projects Forum' started by Jonesy, Jul 27, 2011.

  1. Jonesy

    Thread Starter New Member

    Jul 7, 2010
    20
    0
    Hi everyone, I've been working on a power meter for a long time, and its the finishing step.

    A problem arises when load above 1A are not accurate. below 1A, everything is measure nice and clean.

    I am using Atmega644p and the analog front end is a 0.1 resistor 15W connected at the neutral to an isolation transformer to a 4th order LPF then to myMCU to measure and calculate data.

    Could it be the isolation 1:1 transformer? i cant find any rating on it.
     
Loading...