Fuzzy logic-based controller strategy for a single-input dual-output DC–DC converter for DC homes

Effective power management systems in DC household applications have raised interest in the analytical study of specialized converter topologies and control algorithms. This Article presents the design of a Single-Input Dual-Output (SIDO) converter with control strategies, including a Fuzzy Logic (FL) controller and a Proportional-Integral (PI) controller for voltage control. The proposed SIDO converter has a 48 V input and regulated 24 V and 12 V outputs. The experimental results are validated on the TMS320F28379D Microcontroller by maintaining the output voltage at a constant level in a closed-loop configuration with sensor-based feedback. The PI controller demonstrated a settling time of 5.83 ms and a voltage regulation of 4.7%, whereas the FL controller achieved a settling time of 3.24 ms and a voltage regulation of 0.5% for the 24 V output. The FL controller achieved a settling time of 5.29 ms and a voltage regulation of 1.25% for the 12 V output, significantly improving over the PI's 19.95 ms settling time and 2.16% voltage regulation. These results show that the FL controller has a better dynamic response in terms of rise time, settling time, overshoot, undershoot, and reduced ripple during load surges than the PI controller.