Digital Simulation of an SCR-Driven DC Motor

The digital computer program simulating the SCR-driven dc motor is described. The program is particularly well suited to the investigation of the motor dynamics when both continuous and discontinuous conduction occur. The input signals to the system are a sequence of gate pulses and the instantaneous load torque, and the output signals are the instantaneous armature current and speed. The flowchart of the program, which is based on numerical integration, and an example of the calculated response to a change in the firing angle are given.