Direct current permanent magnet motor servomotor system

Abstract

Abstract A DIRECT CURRENT PERMANENT MAGNET MOTOR SERVOMOTOR SYSTEM WHEREIN THE ARMATURE OF THE MOTOR IS CONNECTED ACROSS AN ALTERNATING CURRENT POTENTIAL SOURCE THROUGH TWOSERIES CONNECTED AND OPPOSITELY POLED DIODES, EACH OF WHICH IS SHUNTED BY THE CURRENT CARRYING ELECTRODES OF A TRANSISTOR. A DETECTOR CIRCUIT RESPONSIVE TO AN EXTERNAL INFLUENCE PRODUCES A DIRECT CURRENT POTENTIAL REFERENCE SIGNAL WHICH CHANGES POLARITY IN RESPONSE TO THE DIRECTION OF CHANGE OF THE EXTERNAL INFLUENCE AND IN MAGNITUDE IN RESPONSE TO THE DEGREE OF CHANGE. THIS REFERENCE SIGNAL IS IMPRESSED ACROSS A MODULATOR CIRCUIT WHICH PRODUCES ALTERNATING CURRENT HALF-WAVE FORM OUTPUT CONTROL SIGNALS OF A POLARITY THE SAME AS AND A MAGNITUDE PROPORTIONAL TO THE POLARITY AND MAGNITUDE OF THE REFERENCE SIGNALS. CIRCUITRY RESPONSIVE TO THE CONTROL SIGNALS PRODUCES A SEPARATE SWITCHING SIGNAL FOR EACH CONTROL SIGNAL POLARITY AND APPLIES THE RESPECTIVE SEPARATE SWITCHING SIGNALS ACROSS THE BASE-EMITTER ELECTRODES OF A RESPECTIVE ONE OF THE SHUNTING TRANSISTORS IN A POLARITY RELATIONSHIP TO PRODUCE COLLECTOR-EMITTER CURRENT FLOW THROUGH THAT TRANSISTOR TO ESTABLISH RESPECTIVE CIRCUITS WHICH ENERGIZE THE PERMANENT MAGNET MOTOR ARMATURE FOR ROTATION IN FIRST AND SECOND DIRECTIONS.

Inventors

• 👤 William T Lemen

Bibliographic Details