Power inverter utilizing controlled resonant commutation

Claim 1

AN INVERTER CIRCUIT COMPRISING AN OUTPUT DEVICE HAVING FIRST AND SECOND, IMPEDANCE SECTIONS COMMONLY CONNECTED ON ONE SIDE, A POWER SOURCE CONNECTED BETWEEN SAID COMMON CONNECTION AND A CIRCUIT POINT, FIRST AND SECOND DIODES CONNECTED ON ONE SIDE TO RESPECTIVE ONES OF THE OTHER SIDE OF SAID IMPEDANCE SECTIONS, FIRST AND SECOND CONTROLLED RECTIFIERS COMMONLY CONNECTED ON ONE SIDE TO SAID CIRCUIT POINT AND ON THE OTHER SIDE TO THE SIDES OF SAID FIRST AND SECOND DIODES, RESPECTIVELY, SAID DIODES AND SAID RECTIFIERS BEING ARRANGED FOR PROVIDING A PAIR OF UNIDIRECTIONAL CONDUCTING PATHS FOR SAID POWER SOURCE THROUGH THE ASSOCIATED SAID IMPEDANCE SECTION, THIRD AND FOURTH CONTROLLED RECTIFIERS HAVING THE SAME SIDE CONNECTED TO SAID CIRCUIT POINT AS SAID FIRST AND SECOND CONTROLLED RECTIFIERS, A PAIR OF SERIES RESONANT CIRCUITS CONNECTED TO THE OTHER SIDE OF RESPECTIVE SAID THIRD AND FOURTH CONTROLLED RECTIFIERS FOR PROVIDING FIRST AND SECOND COMMUTATING CIRCUITS, SAID COMMUTATING CIRCUITS BEING COUPLED IN PARALLEL WITH RESPECTIVE ONES OF SAID FIRST AND SECOND CONTROLLED RECTIFIERS, THIRD AND FOURTH DIODES CONNECTED IN PARALLEL WITH SAID THIRD AND FOURTH CONTROLLED RECTIFIERS, RESPECTIVELY, BUT IN OPPOSITE CURRENT CONDUCTION RELATION WITH RESPECT THERETO, AND CONTROL MEANS FOR INITIATING CIRCUIT OPERATION BY INTRODUCING AND REMOVING THE FIRST CONDUCTION CAUSING SIGNAL TO AT LEAST ONE OF SAID THIRD AND FOURTH CONTROLLED RECTIFIERS AND FOR, CYCLICALLY INTRODUCING AND REMOVING CONDUCTION CAUSING SIGNALS TO SAID CONTROLLED RECTIFIERS THEREAFTER, SAID UNIDIRECTIONAL CONDUCTING PATHS AND SAID CONTROL MEANS BEING ARRANGED FOR ALTERNATELY PRODUCING OPPOSITELY DIRECTED PULSES RELATIVE TO SAID OUTPUT DEVICE WITH SAID COMMUTATING CIRCUITS BEING RESPONSIVE TO SAID CONTROL MEANS FOR INTRODUCING SIGNALS ACROSS SAID FIRST AND SECOND CONTROLLED RECTIFIERS FOR EXTINGUISHING CURRENT CONDUCTION THERETHROUGH.