3 Phase inverter, shunt resistor waveform

Discussion in 'The Projects Forum' started by fasset, Oct 11, 2015.

  1. fasset

    Thread Starter New Member

    May 30, 2014
    I have one question about AN4076 "Two or three shunt resistor based current sensing circuit design in 3-phase inverters" STM Application Note.
    On the page 6, 10 we can see signals on shunt resistor.
    I my opinion current (and shunt resistor voltage) shouldn't have values below zero except some noises. Could anyone explain this?