Control Design and Loop Gain Analysis of DC-to-DC Converters Intended for General Load Subsystems

Syam Kumar Pidaparthy and Byungcho Choi

Mathematical Problems in Engineering, 2015, vol. 2015, 1-10

Abstract:

DC-to-DC converters are usually intended for general applications where the load impedance characteristics are unknown or undefined. This paper establishes the control design procedures for DC-to-DC converters in the absence of any prior knowledge on their load impedance. The proposed control design can be universally adapted to all the DC-to-DC converters regardless of the impedance characteristics of their actual load. This paper also presents the loop gain analysis of the converter combined with an actual load whose impedance characteristics are only available afterward. A graphical analysis method is proposed, which enables us to predict the loop gain of the converter in the presence of an arbitrary load impedance. The validity of the analysis method is demonstrated using a current-mode controlled buck converter coupled with an inductive load, capacitive load, and converter load. Theoretical predictions are verified with both computer simulations and experimental measurements.

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:426315

DOI: 10.1155/2015/426315

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