Analysis of a typical 3-phase star-connected circuit: A phasor diagram approach

Analysis of a typical 3-phase star connected circuit through locus of the tip of any one of the phase voltages is given. Some very interesting properties are proved. With different values of the circuit elements, the circuit becomes voltage to current converter, current to voltage converter, voltage to voltage converter, current to current converter, constant input current circuits and a circuit that maintains output power within certain range over a range of load resistance. In some cases, the circuits are 3-phase circuits while in some cases they are single source circuits. Single source circuits considered by Paice and Dutta Roy are the special cases of these circuits.