Journal
IET POWER ELECTRONICS
Volume 10, Issue 10, Pages 1190-1199Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-pel.2016.0858
Keywords
DC-DC power convertors; modal analysis; reliability; system reliability; nonlinear interaction behaviour; second-order interaction indices; state variables; fundamental modal analysis; converter transient behaviour; nonlinear modal series method; SEPIC DC-DC converters; transient interaction behaviour; nonlinear modal analysis
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Funding
- National Natural Science Foundation of China [51577141]
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This study investigates the transient interaction behaviours in SEPIC DC-DC converters by using non-linear modal series method. Based on the derived non-linear model, the analytical approximate solutions are obtained to characterise the transient behaviours of the converters. Then, fundamental modal analysis is performed to identify the correlation among system parameters, fundamental modes and state variables so that system key parameters are subsequently acquired. In addition, the second-order interaction indices are evaluated in order that the underlying mechanism of non-linear interaction behaviours is uncovered. Finally, theoretical analysis is verified by circuit experiments. These results are beneficial to the improvement of the transient behaviours and the system reliability.
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