SimPowerSystems

Drive Starting

This test simulates 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. The speed reference is stepped from 0 to 120 rad/s at t = 0.0 s and you can observe the DC motor speed and current.

The transient responses for the starting of the DC motor drive are shown in Figure 2-13.

Note that you can save the final system state vector xFinal by selecting the Workspace I/O --> Save to workspace --> Final state checkbox in the Simulation parameters dialog. It can be used as the initial state in a subsequent simulation so that the simulation can start under steady-state conditions.

Figure 2-13: Starting the DC Motor Drive

Simulation of the DC Drive

Steady-State Voltage and Current Waveforms