Simulation Research on the Digital Servo Drive System for the Large Inertia and DC Torque Motor

To solve the problem of the speed stability on the digital servo drive system for the large inertia and DC torque motor and improve the system’s performance and reliability, the research on control strategy is conducted. Based on the working characteristics of the radar turntable DC torque motor servo system, the three PWM control modes on the H-bridge power main circuit and the current pulsating quantity and direct connection on uni-polar control mode are analyzed; by improving the pulse voltage frequency on the armature’s ends, the system’s performance is improved. The system’s mathematical model is established, the system is simulated by using the transfer function in the MATLAB/SIMULINK and analyzed in the qualitative method.