Open Delta Voltage Regulator

Discussion in 'General Electronics Chat' started by Cerkit, Oct 27, 2015.

  1. Cerkit

    Thread Starter Active Member

    Jan 4, 2009
    Can someone explain how the third phase in an open delta voltage regulator scheme is also regulated?

    I don't understand how regulating the the red and blue phase using two 'cans' results in the third phase also being regulated?

  2. Johann

    Senior Member

    Nov 27, 2006
    Remember: "phase" means a coil or capacitor between two lines or between a line and a neutral. As long as all three "LINES" are connected, the phase between line 2 and line 1 is "seen" by the two lines. Similarly, the next phase is between line 1 and line 3. Lastly, the "open" phase lies between line 3 and line 2 and although there is no single coil or capacitor between them, they still "see" a phase because between line 3 and line 2 there are two coils, but they are not in phase with each other, so yellow "sees" a resultant "phase". I hope you can follow what i am trying to say. See the attached sketch, which is an example only of an anti-clock rotation of phases. IMG-20151027-00187.jpg