Control system for a generator

Claim 1

A SYSTEM FOR CONTROLLING THE OUTPUT VOLTAGE OF A GENERATOR HAVING ARMATURE AND FIELD WINDINGS COMPRISING A SENSING CIRCUIT INCLUDING RECTIFYING AND VOLTAGE REDUCING MEANS CONNECTED TO THE GENERATOR ARMATURE WINDING FOR PROVIDING A SENSED DIRECT VOLTAGE WHICH IS A REPLICA OF THE GENERATOR OUTPUT VOLTAGE, A DEVICE IN THE SENSING CURCUIT FOR ADJUSTING THE GENERATOR OUTPUT VOLTAGE AND FOR FURTHER REDUCING THE SENSED VOLTAGE, A REFERENCE CIRCUIT INCLUDING A MAGNETIC SATURABLE DEVICE HAVING A POWER SOURCE AND A RECTIFIER FOR FURNISHING A REFERENCE VOLTAGE, A COMPONENT CONNECTED WITH THE SATURABLE DEVICE FOR MAINTAINING THE REFERENCE VOLTAGE FREQUENCY CONSTANT ABOVE A PREDETERMINED VALUE, MEANS MATCHING THE SENSED AND REFERENCE VOLTAGES TO PROVIDE A DIFFERENCE VOLTAGE, AN AMPLIFYING DEVICE, STABILIZING MEANS FOR PROVIDING THE DESIRED LEVEL OF GAIN AND FOR OBTAINING STEADY-STATE REGULATION IN THE SYSTEM INTERCONNECTING THE REFERENCE VOLTAGE OUTPUT WITH SAID AMPLIFYING DEVICE, A CAPACITOR CONNECTED TO THE AMPLIFYING DEVICE AND HAVING A CHARGING CURRENT PROPORTIONAL TO THE DIFFERENCE VOLTAGE, A TRANSISTOR CONNECTED BETWEEN THE CAPACITOR AND A SEMI-CONDUCTOR DEVICE, SAID TRANSISTOR HAVING A PEAK FIRING VOLTAGE SUBSTANTIALLY THE SAME AS THE PEAK VOLTAGE OF THE CAPACITOR SO THAT WHEN THE TRANSISTOR FIRES A PULSE IS DELIVERED TO THE SEMI-CONDUCTOR DEVICE FOR CAUSING IT TO CONDUCT, SEMICONDUCTOR DEVICE BEING CONNECTED WITH THE GENERATOR FIELD WINDING FOR PROVIDING EXCITATION POWER TO THE LATTER CORRESPONDING TO SAID DIFFERENCE VOLTAGE.