This work explores the design, simulation, construction, and analysis of a novel Non-isolated DC-DC Buck-Boost converter which has the advantage of incorporating a low-side switch compared to the traditional buck-boost which requires a high-side switch. This allows the use of a low-side driver which further simplifies the design and operation of the converter. The proposed Buck-Boost converter was constructed to provide -24 V output from an input range of 12V-18V with 15V nominal input at 10W maximum output power utilizing 500kHz switching frequency. Findings from simulations and hardware tests verify that the converter effectively provides the desired -24 V output at varying loads with less than 3% ripple. At the nominal input voltage, the efficiency of the converter reaches 82.37% at full load and peak efficiency of 88.5% at 20% load. Moreover, the input voltage ripple of the proposed non-isolated converter reached 8.4% at full load, due to the pulsating nature of the input current. Overall, results verify the feasibility of the proposed non-isolated Buck-Boost converter as an alternative solution for the conventional buck-boost with the advantage of a low side switch while maintaining a low component count.
| Identifer | oai:union.ndltd.org:CALPOLY/oai:digitalcommons.calpoly.edu:theses-4461 |
| Date | 01 June 2024 |
| Creators | Awidah, Abdullah |
| Publisher | DigitalCommons@CalPoly |
| Source Sets | California Polytechnic State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Master's Theses |
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