GCRIS

This thesis investigates the design and implementation of a DC-DC converter compliant with military standards. Power electronic systems used in military applications are required to operate reliably under harsh environmental and electrical conditions such as high electromagnetic interference (EMI), voltage spikes and surges, and reverse polarity. Therefore, the developed DC-DC converter must ensure robust and stable operation under these challenging conditions. Within the scope of this study, the military standards MIL-STD-461G, MIL-STD-1275E, and MIL-STD-704F related to DC–DC converters are examined. To meet the EMI requirements defined by MIL-STD-461G, an EMI filter is designed and prototyped, and the design is validated through the MIL-STD-461G CE102 test. In addition, the frequency attenuation characteristics of the EMI filter are obtained using a Bode Analyzer, and the measurement results are compared with simulation outcomes. To satisfy the electrical and transient voltage requirements specified in MIL-STD-1275E and MIL-STD-704F, an input protection circuit consisting of spike protection, reverse polarity protection, and surge protection is designed and prototyped. The proposed protection circuit successfully passes the MIL-STD-1275E compliance tests. In order to achieve high efficiency over a wide input voltage range, a two-stage isolated DC–DC converter architecture is adopted instead of a single-stage isolated topology. The first-stage performs voltage regulation using a synchronous buck converter, while the second-stage provides galvanic isolation through a full-bridge converter with synchronous rectification. The proposed two-stage isolated DC-DC converter is modeled and simulated in the MATLAB Simulink environment. Finally, the obtained results are discussed and future work is outlined.

Yüksek Lisans Tezleri

Browse

Filters

Settings

Sort By

Results per page

Search Results