Semiconductor voltage regulator

Claim 1

A VOLTAGE REGULATING SYSTEM FOR AN ALTERNATING CURRENT GENERATOR HAVING AN OUTPUT WINDING AND A FIELD WINDING COMPRISING, AT LEAST ONE CONTROLLED RECTIFIER HAVING AN ANODE, CATHODE AND GATE, MEANS CONNECTING THE ANODE AND CATHODE OF SAID CONTROLLED RECTIFIER AND SAID FIELD WINDING ACROSS SAID OUTPUT WINDING WHEREBY SAID FIELD WINDING IS ENERGIZED IN ACCORDANCE WITH THE CONDUCTION AND NONCONDUCTION OF SAID CONTROLLED RECTIFIER, AN OSCILLATOR CIRCUIT INCLUDING A UNIJUNCTION TRANSISTOR AND A CAPACITOR, SAID UNIJUNCTION TRANSISTOR HAVING AN EMITTER AND FIRST AND SECOND BASE ELECTRODES, A PAIR OF CONTROL CONDUCTORS, MEANS CONNECTED BETWEEN SAID OUTPUT WINDING OF SAID GENERATOR AND SAID CONTROL CONDUCTORS FOR APPLYING A DIRECT CURRENT CONTROL VOLTAGE TO SAID CONTROL CONDUCTORS WHICH IS A FUNCTION OF THE OUTPUT VOLTAGE OF SAID GENERATOR, MEANS CONNECTING THE BASE ELECTRODES OF SAID UNIJUNCTION TRANSISTOR RESPECTIVELY WITH SAID CONTROL CONDUCTORS WHEREBY SAID DIRECT CURRENT CONTROL VOLTAGE IS APPLIED TO SAID BASE ELECTRODES, A RESISTOR, MEANS CONNECTING SAID RESISTOR AND SAID CAPACITOR IN SERIES ACROSS SAID CONTROL CONDUCTORS, SAID RESISTOR AND CAPACITOR HAVING A COMMON JUNCTION CONNECTED TO SAID EMITTER OF SAID UNIJUNCTION TRANSISTOR, A DISCHARGING CIRCUIT FOR SAID CAPACITOR INCLUDING THE EMITTER AND ONE OF THE BASE ELECTRODES OF SAID UNIJUNCTION TRANSISTOR, MEANS COUPLING SAID DICHARGING CIRCUIT AND THE GATE AND CATHODE OF SAID CONTROLLED RECTIFIER, SAID CONTROLLED RECTIFIER BEING GATED TO A CONDUCTIVE CONDITION WHEN SAID CAPACITOR DISCHARGES, A BIASING CIRCUIT INCLUDING A ZENER DIODE CONNECTED ACROSS SAID CONTROL CONDUCTORS AND HAVING A REFERENCE POTENTIAL POINT, THE VOLTAGE OF SAID REFERENCE POTENTIAL POINT BEING MAINTAINED SUBSTANTIALLY CONSTANT BY SAID ZENER DIODE WITH VARIATIONS IN SAID DIRECT CURRENT CONTROL VOLTAGE, AND A CLAMPING DIODE CONNECTED BETWEEN SAID COMMON JUNCTION OF SAID RESISTOR AND CAPACITOR AND SAID REFERENCE POTENTIAL POINT WHEREBY THE VOLTAGE OF SAID COMMON JUNCTION IS LIMITED TO A PREDETERMINED VALUE AS SAID DIRECT CURRENT CONTROL VOLTAGE INCREASES, THE VOLTAGE OF SAID COMMON JUNCTION BEING SUCH THAT SAID UNIJUNCTION TRANSISTOR IS BIASED NONCONDUCTIVE TO PREVENT DISCHARGING OF SAID CAPACITOR WHEN SAID DIRECT CURRENT CONTROL VOLTAGE EXCEEDS A PREDETERMINED VALUE WHEREBY TURN-ON PULSES TO SAID CONTROLLED RECTIFIER ARE TERMINATED, SAID UNIJUNCTION TRANSISTOR BEING BIASED TO CONDUCT WHEN SAID CONTROL VOLTAGE DROPS TO A PREDETERMINED VALUE WHEREBY TURN-ON PULSES ARE APPLIED TO SAID CONTROLLED RECTIFIER.