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Voltage-Controlled Buck Converter

This example shows the operation of a voltage-controlled buck converter.


The DC motor is fed by the DC source through a Buck Converter block implementing an IGBT/diode pair. The motor drives a mechanical load characterized by inertia J, friction coefficient B, and load torque TL.

The hysteresis current controller compares the sensed current with the reference and generates the trigger signal for the IGBT 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.