Power System Blockset

Drive Starting

In this test, we simulate the starting transient of the DC drive. The inertia of the mechanical load is small in order to bring out the details of the chopper commutation details. The speed reference is stepped from 0 to 120 rad/s at t=0.0 s and we observe the DC motor speed and current.

The transient responses for the starting of the DC motor drive are shown in Figure 2-14.

Note that the final system state vector xFinal can be saved by selecting
Workspace I/O/Save to workspace/Final state in the Simulation Parameters window. It can be used as initial state in subsequent simulation so that the simulation can start under steady-state conditions.

Figure 2-14: Starting of the DC Motor Drive

Simulation of the DC Drive

Steady-State Voltage and Current Waveforms