Acceleration and deceleration control system for dc motor

Claim 1

AN ACCELERATION AND DECELERATION CONTROL SYSTEM FOR A DC MOTOR HAVING A ROTOR WHICH IS ACCELERATED FROM REST TO OPERATING SPEED AND WHICH IS DECELERATED FROM OPERATING SPEED TO REST DURING NORMAL OPERATION, SAID ROTOR HAVING A ROTOR WINDING THROUGH WHICH ACCELERATION CURRENT FLOWS DURING ACCELERATION OF SAID ROTOR AND THROUGH WHICH DECELERATION CURRENT FLOWS DURING DECELERATION OF SAID ROTOR, OPERATING CURRENT FLOWING THERETHROUGH DURING OPERATING SPEED THEREOF, SAID CONTROL SYSTEM COMPRISING ROTOR CURRENT SUPPLY MEANS FOR SUPPLYING ACCELERATION CURRENT, OPERATING CURRENT AND DECELERATION CURRENT TO SAID ROTOR; INTEGRATING MEANS COUPLED TO SAID ROTOR CURRENT SUPPLY MEANS FOR INTEGRATING SAID ACCELERATION CURRENT DURING ACCELERATION OF SAID ROTOR AND FOR INTEGRATING SAID DECELERATION CURRENT DURING DECELERATION OF SAID ROTOR; CLAMPING MEANS CONNECTED BETWEEN SAID INTEGRATING MEANS AND SAID ROTOR CURRENT SUPPLY MEANS FOR CLAMPING THE INTEGRATED ACCELERATION CURRENT WHEN SAID INTEGRATED ACCELERATION CURRENT REACHES AN OPERATING MAGNITUDE CORRESPONDING TO THE OPERATING SPEED OF SAID ROTOR AND FOR CLAMPING THE INTEGRATED DECELERATION CURRENT WHEN SAID INTEGRATED DECELERATION CURRENT REACHES A REST MAGNITUDE CORRESPONDING TO ZERO OPERATING SPEED; DIFFERENTIATING MEANS CONNECTED TO SAID INTEGRATING MEANS FOR DIFFERENTIATING THE INTEGRATED ACCELERATION AND DECELERATION CURRENTS; AND CONTROL MEANS CONNECTED BETWEEN SAID DIFFERENTIATING MEANS AND SAID ROTOR CURRENT SUPPLY MEANS FOR STOPPING THE SUPPLY OF ACCELERATION CURRENT AND INITIATING THE SUPPLY OF OPERATING CURRENT TO SAID ROTOR AT THE TIME THAT SAID INTEGRATED ACCELERATION CURRENT REACHES SAID OPERATING MAGNITUDE AND FOR STOPPING THE SUPPLY OF DECELERATION CURRENT AND STOPPING THE SUPPLY OF CURRENT TO SAID ROTOR AT THE TIME THAT SAID INTEGRATED DECELERATION CURRENT REACHES SAID REST MAGNITUDE.