Controlled power rectifier system

Claim 1

A POWER RECTIFIER SYSTEM COMPRISING AN ALTERNATING-CURRENT FEEDER CIRCUIT, A DIRECT-CURRENT LOAD CIRCUIT, TWO MULTIPHASE GROUPS OF ELECTRIC VALVE MEMBERS IN DOUBLE-STAR CONNECTION, EACH MEMBER HAVING TWO MAIN ELECTRODES AND AN IGNITION CONTROL ELECTRODE, THE MAIN ELECTRODES OF A GIVEN POLARITY HAVING A COMMON LEAD, AN INTERPHASE TRANSFORMER HAVING TWO WINDING PORTIONS SERIALLY CONNECTED BETWEEN THE TWO STAR POINTS OF SAID RESPECTIVE GROUPS, SAID LOAD CIRCUIT EXTENDING FROM BETWEEN SAID TWO WINDING PORTIONS TO SAID COMMON ELECTRODE LEAD, IGNITION-ANGLE CONTROL MEANS HAVING IGNITION PULSE CIRCUITS CONNECTED TO SAID RESPECTIVE CONTROL ELECTRODES FOR SHIFTING THE IGNITION OF SAID VALVE MEMBERS RELATIVE TO THE VOLTAGE CYCLE OF THE ALTERNATING FEEDER CURRENT, SAID IGNITION-ANGLE CONTROL MEANS HAVING TWO FIXED PULSE PHASE POSITIONS IN THE CYCLE RANGES OF RECTIFYING AND INVERTING OPRATIONS RESPECTIVELY OF SAID VALVE MEMBERS, CONDITION-RESPONSIVE MAIN REGULATING MEANS COMPRISING AN INERTIA-FREE ELECTRONIC SWITCHING DEVICE CONNECTED TO SAID IGNITION-ANGLE CONTROL MEANS FOR TRIGGERING THE LATTER, SAID MAIN REGULATING MEANS BEING CONNECTED WITH SAID LOAD CIRCUIT AND RESPONSIVE TO A GIVEN OPERATING CONDITION OF SAID LOAD CIRCUIT FOR ABRUPTLY SWITCHING THE IGNITION ANGLE BETWEEN SAID TWO FIXED PHASE POSITIONS TO THEREBY REGULATE SAID OPERATING CONDITION, AUXILIARY REGULATING MEANS HAVING A SENSING CIRCUIT CONNECTED WITH SAID INTERPHASE TRANSFORMER FOR RESPONSE TO ASYMMETRICAL CURRENT DISTRIBUTION IN SAID TWO WINDING PORTIONS, SAID AUXILIARY REGULATING MEANS HAVING PULSE GENERATING MEANS CONNECTED BETWEEN SAID SENSING CIRCUIT AND SAID MAIN REGULATING MEANS FOR CORRECTIVELY CONTROLLING SAID MAIN REGULATING MEANS TO MAINTAIN CURRENT BALANCE IN SAID TWO WINDING PORTIONS.