A voltage constrained time sharing switching scheme for dual input buck converter

Abstract

The objective of this paper is to develop and analyze an analog circuit capable of delivering regulated output voltage in a dual input buck converter. The major components of the control circuit comprise a PI controller block and a duty ratio limit block. The PI controller is designed through linear control theory and the duty ratio limit on the each power switch is based on the relative amplitude of the source voltage connected to each power source. The development of the circuit is explained first followed by computed and measured results on a prototype.

Exact steady‐state analysis in multiple‐input converters applied with diverse time‐sharing switching schemes

“…Owing to page limitation, MIbC is used to serve as an illustrative example because of its straightforward circuit configuration and high-frequent appearance in MIC applications [1,5,[7][8][9]13]. The contents of the paper are organised as follows: exact steady-state analysis and derivation in MIbC, based on TEM and IDEM TSS functions and operating in CCM and DCM, will be, respectively, discussed in Section 2; followed by the proposed generalisation procedures in Section 3, series of analytical expressions for rest of the MIC topologies besides MIbC could be established (two typical ones will be listed in Appendix); a MIbC prototype with two input legs will be implemented and studied for theoretical verification in Section 4; finally, conclusions will be drawn.…”

“…The mathematical derivation therein revealed some forward‐looking relations among parameters of the common inductor current. Applied in DIbC as well, Sudareswaran et al [13] established an output‐voltage regulator via several amplifier circuits and logic‐gates to obtain a pair of switching functions with time‐varying phase shifts between both. It was certainly another eligible IDEM case, but unfortunately paid little attention to the state‐space modelling itself.…”