Power System Blockset

Drive Starting

You can start the drive from a standstill by specifying 0 initial conditions for all state variables in the powergui interface and specifying [1,0,0,0,0,0,0,0] as the initial conditions for the Asynchronous Machine block. In this example, the speed reference is stepped from 0 to 120 rad/s at
t = 0 and we observe the motor speed, torque, and current.

The transient responses for the starting of the induction motor drive are shown in Figure 2-25.

Note that you can save the final system state vector by previously selecting Workspace I/O/Save to work space/Final state in the Simulation Parameters window.

Figure 2-25: Starting of the Induction Motor Drive

Simulating the Induction Motor Drive

Steady-State Voltage and Current Waveforms