Evaluation of SoTA control strategies designed for a LLC Converter in an Aerospace environment

Sammanfattning: This thesis is an investigation into suitable control algorithms for military applications of the high frequency (600kHz) LLC Converter. The thesis focuses on establishing a basis for mimicking a military application; loads, sources and peripheral conditions. The mimicked system is then used for evaluation of high-performance algorithms suggested by the latest research in the field. The algorithms used, mainly aim to either solve an existing problem such as over current or improve performance in load response. The result was not ideal for a comparison between the algorithms due to the narrow applicability of many of the latest research control strategies. The four algorithms used resulted in only one which could be applied on a 600kHz converter. The remaining algorithms violated the frequency area for where they were applicable, which resulted in a conclusion regarding the control design limitations. The report’s conclusion is that a PI controller is not ideal for a converter in a military application, due to lack of current limitation, but the PI controller was the only algorithm able to control the system which leaves it as the strongest candidate with certain design restrictions.