Ferroresonant three-phase constant AC voltage transformer arrangement with compensation for unbalanced loads

The ferroresonant three-phase constant AC voltage transformer comprising:

• three magnetically permeable transformer cores,
• first and second primary side windings and a secondary side winding formed on each of the transformer cores,
• two sets of three input terminals;
• six input means each of which can be in an inductive coupling and each of which provides an inductive reactance effectively in series with a corresponding one of said primary side windings to thereby form two sets of three primary phase winding units each, and with each such set in a predetermined connection pattern to a corresponding one of the two sets of three input terminals,
• automatic voltage regulating means for controlling secondary side output voltages generated at the secondary side windings to a predetermined value,
• six compensating windings each formed so as to be inductively coupled with a corresponding one of said input means, and
• means for connecting those said compensating windings corresponding to one of said two sets of primary phase winding units to each other in series to form a closed loop circuit, and means for connecting those said compensating windings corresponding to the other of said two sets of primary phase winding units to each other in series to form another closed loop circuit.