Available at: https://digitalcommons.calpoly.edu/theses/3262
Date of Award
6-2026
Degree Name
MS in Electrical Engineering
Department/Program
Electrical Engineering
College
College of Engineering
Advisor
Taufik
Advisor Department
Electrical Engineering
Advisor College
College of Engineering
Abstract
This work presents a soft‑switching multiple‑input, single‑output (MISO) DC‑DC converter designed for renewable‑energy systems. As global electrical‑power demand accelerates and reliance on fossil‑fuel‑driven AC infrastructure becomes increasingly unsustainable, efficient DC power‑processing solutions are essential. Designed for operation with DC power sources like solar panels and batteries, the proposed MISO converter accepts three independent DC renewable sources simultaneously and output a single 48 V bus capable of delivering 600 W power. Earlier converter iterations were limited by excessive switching losses and elevated device temperatures. To improve efficiency and system thermal response, the proposed MISO converter employs soft‑switching techniques that introduce controlled resonant behavior, enabling zero‑voltage or zero‑current switching and effectively eliminating primary switching losses. Experimental results demonstrate the proposed MISO converter achieving 95% efficient while supplying 600 W through three paralleled converter boards. Additionally, the proposed MISO converter exhibit improved thermal behavior, with critical components operating approximately 10 °C cooler than in previous designs.