DC-DC Converter Modeling with Simulink

For DC-DC converter modeling in Simulink, users can follow these fundamental step-by-step procedures. The modeling process typically begins with open-loop system implementation, where the power stage components (inductors, capacitors, switches) are modeled using Simscape Electrical libraries or basic Simulink blocks, followed by the development of closed-loop control systems incorporating PID controllers and pulse-width modulation (PWM) generators. During the modeling phase, three primary converter topologies can be implemented: buck converters (step-down voltage regulation), boost converters (step-up voltage conversion), and buck-boost converters (bidirectional voltage adjustment). The implementation typically involves configuring switching frequencies, duty cycle control, and power component parameters. Additionally, transient analysis can be performed using Simulink's simulation capabilities to examine system dynamic responses, including startup behavior, load transients, and reference tracking performance through time-domain simulations and scope measurements.