Means for increasing the inductance of shunt reactors

Claim 1

A HIGH VOLTAGE REACTOR COMPRISING, IN COMBINATION, A CASING, A COOLING AND INSULATING DIELECTRIC LIQUID WITHIN SAID CASING, AN ANNULAR COIL IMMERSED IN SAID DIELECTRICC LIQUID WITHIN SAID CASING AND HAVING ITS AXIS HORIZONTAL AND AN AXIALLY EXTENDING NONMAGNETIC CORE, LAMINATED MAGNETICALLY PERMEABLE YOKE MEANS IMMERSED IN SAID DIELECTRIC LIQUID WITHIN SAID CASING AND HAVING SIDE PORTIONS NEAR THE AXIAL ENDS OF SAID COIL AND END PORTIONS PARALLEL TO THE AXIS OF SAID COIL CONNECTING SAID SIDE PORTIONS FOR COMPLETING A CLOSED MAGNETICALLY PERMEABLE PATH FOR MAGNETIC FLUX IN SURROUNDING RELATION TO SAID COIL AND FOR DECREASING THE LENGTH OF AVERAGE FLUX PATH SO THAT SUBSTANTIALLY ALL OF THE RELUCTANCE OF THE MAGNETIC FLUX PATHH IS INTERNAL OF SAID COIL, SAID YOKE MEANS HAVING LAMINATIONS IN PLANES PARALLEL TO THE AXIS OF SAID COIL, SAID COIL HAVING AN AXIAL LENGTH LESS THAN TWICE ITS DIAMETER AND COMPRISING TWO COIL GROUPS ELECTRICALLY CONNECTED IN PARALLEL AND WOUND IN OPPOSITE DIRECTIONS AND HAVING THEE HIGH VOLTAGE LEAD AND GROUND LEAD CONNECTED AT THE JUNCTIONS BETWEEN SAID COIL GROUPS, EACH SAID COIL GROUP COMPRISING A PLURALITY OF SERIES CONNECTED, AXIALLY ALIGNED AND SPACED APART PANCAKE WINDINGS HAVING A HORIZONTAL AXIS AND PERMITTING CIRCULATION OF SAID DIELECTRIC LIQUID VERTICALLY BETWEEN SAID PANCAKE WINDINGS AND EACH SAID PANCAKE WINDING BEING WOUND OF RECTANGULAR STRIP CONDUCTOR HAVING A SUBSTANTIALLY GREATER DIMENSION IN THE AXIAL DIRECTION THEN IN THE RADIAL DIRECTION, THE PANCAKE WINDINGS IN SAID TWO COIL GROUPS CONNECTED TO SAID GROUND LEAD BEING POSITIONED NEAR SAID YOKE MEANS AND THE PANCAKE WINDINGS IN SAID TWO COIL GROUPS CONNECTED TO SAID HIGH VOLTAGE LEAD BEING DISPOSED ADJACENT THE CENTER OF SAID COIL, THE AXIAL SPACING BETWEEN ADJACENT PANCAKE WINDINGS BEING APPROXIMATELY UNIFORM AND SAID MAGNETICALLY PERMEABLE YOKE MEANS BEING SPACED A DISTANCE FROM THE PANCAKE WINDINGS AT THE AXIAL ENDS OF SAID COIL NO GREATER THAN TWICE THE AXIAL SPACING BETWEEN ADJACENT PANCAKE WINDINGS.