Three PWM-Based Buck Converter Closed-Loop Models in Simulink

Three closed-loop PWM-controlled Buck converter models have been developed in Simulink and validated for proper operation. These models incorporate the following key characteristics: 1. Stability: The models employ advanced control strategies (such as PID controllers and voltage feedback loops) to maintain stable output voltage regulation, ensuring compliance with system requirements. The controller gains can be tuned using Simulink's PID Tuner tool for optimal performance. 2. Efficiency: Utilizing high-efficiency PWM control algorithms with precise switching frequency configuration, these models maximize power conversion efficiency while minimizing energy losses. The PWM generation blocks implement carrier-based modulation with adjustable duty cycles. 3. Adjustability: Users can dynamically modify parameters (e.g., reference voltage, filter components, switching frequency) through Simulink's mask parameters or workspace variables to achieve different voltage conversion ratios. The models include configurable subsystems for easy parameter adjustment. 4. Reliability: Incorporated protection mechanisms include overvoltage/undervoltage detection circuits and fault handling logic. These features safeguard the circuit against abnormal operating conditions, enhancing system reliability through conditional subsystems and saturation blocks. These Buck converter closed-loop models enable power conversion simulation and analysis in Simulink, assisting engineers in designing more reliable and efficient power supply systems. The models utilize Simulink's power electronics components library (Simscape Electrical) for accurate semiconductor modeling and support code generation for microcontroller implementation.