설계 시간 가속화를 위한 NSGA-II 알고리즘 기반 LLC 공진형 컨버터용 고주파 변압기 최적 설계 기법

Abstract

This paper proposes an optimal design method to minimize the volume and losses of the frequency converter for achieving high efficiency and high density in LLC resonant converters. Specifically, we focus on reducing the volume and losses of the high-frequency transformer, utilizing the Non-Dominated Sorting Genetic Algorithm II (NSGA-II) for this purpose. The proposed method, in contrast to global search methods exploring all possibilities, efficiently acquires Pareto Set values using NSGA-II, thereby reducing design time. The design process was conducted using Matlab, and the results obtained from applying the algorithm were compared with those from global search in terms of design time and accuracy. Additionally, the optimal design points were validated through experimentation.