Chopper-Fed DC Motor Drive
This example shows a Chopper-Fed DC Motor Drive.
Description
The DC motor is fed by the DC source through a chopper which consists of GTO thyristor and free-
wheeling diode D1. The motor drives a mechanical load characterized by inertia J, friction coeficient B,
and load torque TL.
The hysteresis current controller compares the sensed current with the reference and generates the
trigger signal for the GTO thyristor to force the motor current to follow the reference. The speed control
loop uses a proportional-integral controller which produces the reference for the current loop. Current
and Voltage Measurement blocks provide signals for visualization purpose.
Simulation
Motor starting
Start the simulation. Observe the motor current, voltage, and speed during the starting on the scope. At
the end of the simulation time (1.5 s), the system has reached its steady-state.
Response to a change in reference speed and load torque
The initial conditions state vector 'xInitial' to start with wm = 120 rad/s and TL = 5 N.m has been saved in
the 'power_dcdrive_init.mat' file. This file is automatically loaded in your workspace when you start the
