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Interval-based Controller Design Considering Parameter Variations for DC/DC Converters

DC/DC 컨버터의 파라미터 변화를 고려한 구간분석법 기반 제어기 설계

  • Choi, Sungjin (School of Electrical Engineering, University of Ulsan)
  • 최성진 (울산대학교 전기공학부)
  • Received : 2013.04.12
  • Accepted : 2013.09.02
  • Published : 2013.10.01

Abstract

By performing interval analysis on the system transfer function, we propose an improved method of control loop design for a DC/DC converter. In conventional design methods, the effect of system parameter change due to the specified range of operating conditions and production tolerances in power components should be checked a posteriori, because this may result in a transfer function shift and performance degradation. In the proposed method, a possible parameter change is considered a priori in the design step in order that the desired crossover frequency and sufficient phase margin can be achieved even in the worst case condition. As an illustrative example, a buck dc/dc converter is designed by two different methods and performance comparisons are performed to verify the feasibility of the proposed scheme.

Acknowledgement

Supported by : 울산대학교

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