Simulink Model for DC-DC Converter with PWM PI Control Implementation

This paper presents a comprehensive study of DC-DC converter modeling in Simulink, focusing on the implementation of PWM PI control methodology. The discussion begins with a detailed explanation of DC-DC converter operating principles and their diverse application domains in power electronics systems. Subsequently, we demonstrate step-by-step construction of the Simulink model, highlighting key blocks such as voltage source components, switching devices, and filter elements. The implementation employs PWM generation through Simulink's Pulse Generator block with duty cycle modulation, integrated with a PI controller using Transfer Function blocks for error compensation and stability enhancement. The control algorithm implementation utilizes Simulink's PID Controller block configured for proportional-integral action, where the controller parameters are tuned using optimization techniques like Ziegler-Nichols or automated tuning tools. We explain how the feedback loop maintains output voltage regulation through continuous error signal processing and duty cycle adjustment. Finally, we explore model optimization strategies including parameter sweeping for component values and controller gains, along with potential improvements such as adding feedforward control or implementing advanced modulation techniques. Through this systematic approach, readers will gain thorough understanding of DC-DC conversion principles, Simulink modeling techniques, and practical implementation of PWM PI control for achieving enhanced performance metrics including improved transient response, reduced output ripple, and superior stability characteristics in power conversion applications.