Transformer apparatus

Claim 1

A TRANSFORMER SYSTEM FOR SUPPLYING POWER TO A LOAD FROM AN A.C. INPUT COMPRISING A THREE-LEGGED CORE OF FERROMAGNETIC MATERIAL, THE LEGS OF SAID CORE BEING OF SUCH CONFIGURATION AND SO ALIGNED WITH EACH OTHER THAT SUBSTANTIALLY CLOSED HIGH PERMEABILITY PATHS ARE FORMED BETWEEN ALL OF THE LEGS; AT LEAST THREE COILS WOUND ON SAID CORE, EACH OF SAID COILS BEING WHOLLY WOUND ON A DIFFERENT ONE OF THE LEGS AND SAID FIRST AND SECOND OF SAID COILS BEING CONNECTED IN SERIES; AN INPUT, AN OUTPUT, AND A CONTROL ELECTRICAL CIRCUIT, ALL PASSING CURRENT, THE INPUT CIRCUIT INCLUDING ONE OF (A) THE THIRD OF SAID COILS AND (B) THE SERIES COMBINATION OF SAID FIRST AND SECOND COILS AND BEING CONNECTED ACROSS SAID INPUT, THE OUTPUT CIRCUIT INCLUDING THE OTHER OF (A) SAID THIRD COIL AND (B) THE SERIES COMBINATION OF SAID FIRST AND SECOND COILS AND BEING CONNECTED ACROSS SAID LOAD; SAID INPUT AND OUTPUT ELECTRICAL CIRCUITS FORMING WITH SAID CORE AN INPUT AND AN OUTPUT MAGNETIC CIRCUIT, ONE INCLUDING ALL THREE OF SAID LEGS AND THE OTHER INCLUDING THE FIRST AND SECOND OF SAID LEGS BUT BYPASSING AT LEAST THE MAJOR PORTION OF THE THIRD LEG, SAID INPUT AND OUTPUT ELECTRICAL CIRCUITS BEING SO INDUCTIVELY RELATED TO SAID FIRST AND SECOND LEGS THAT THE INPUT AND OUTPUT MAGNETOMOTIVE FORCES GENERATED BY THE INPUT AND OUTPUT CURRENTS AID IN ONE OF SAID FIRST AND SECOND LEGS AND OPPOSE IN THE OTHER OF SAID FIRST AND SECOND LEGS; AND A CAPACITIVE REACTANCE, SAID CONTROL ELECTRICAL CIRCUIT INCLUDING SAID CAPACITIVE REACTANCE AND BEING INDUCTIVELY COUPLED TO THE LEG ON WHICH ONE OF SAID FIRST AND SECOND COILS IS WOUND, SAID ONE COIL BEING WOUND ON ONE OF SAID FIRST AND SECOND LEGS; WHEREBY NO POWER IS DIRECTLY COUPLED BETWEEN SAID INPUT AND OUTPUT ELECTRICAL CIRCUITS, BUT THE CONTROL CURRENT PRODUCING A MAGNETOMOTIVE FORCE IN SAID ONE OF SAID FIRST AND SECOND LEGS OF PHASE AND MAGNITUDE TO PRODUCE A RESULTANT OF THE CONTROL AND OUTPUT MAGNETOMOTIVE FORCES OPPOSITE TO THE OUTPUT MAGNETOMOTIVE FORCE IN SAID LAST-MENTIONED LEG AND THEREBY TO COUPLE POWER FROM THE INPUT TO THE LOAD THROUGH SAID CONTROL ELECTRICAL CIRCUIT.