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http://dx.doi.org/10.6113/JPE.2012.12.2.317

Approximate Equivalent-Circuit Modeling and Analysis of Type-II Resonant Immittance Converters  

Borage, Mangesh (Raja Ramanna Centre for Advanced Technology)
Nagesh, K.V. (Bhabha Atomic Research Centre)
Bhatia, M.S. (Bhabha Atomic Research Centre)
Tiwari, Sunil (Raja Ramanna Centre for Advanced Technology)
Publication Information
Journal of Power Electronics / v.12, no.2, 2012 , pp. 317-325 More about this Journal
Abstract
Resonant immittance converter (RIC) topologies can transform a current source into a voltage source (Type-I RICs) and vice versa (Type-II RICs), thereby making them suitable for many power electronics applications. RICs are operated at a fixed frequency where the resonant immittance network (RIN) exhibits immittance conversion characteristics. It is observed that the low-frequency response of Type-II RINs is relatively flat and that the state variables associated with Type-II RINs affect the response only at the high frequencies in the vicinity of the switching frequency. The overall response of a Type-II RIC is thus dominated by the filter response, which is particularly important for the controller design. Therefore, an approximate equivalent circuit model and a small-signal model of Type-II RICs are proposed in this paper, neglecting the high-frequency response of Type-II RINs. While the proposed models greatly simplify and speed-up the analysis, it adequately predicts the open-loop transient and small-signal ac behavior of Type-II RICs. The validity of the proposed models is confirmed by comparisons of their results with those obtained from a cycle-by-cycle simulation and with an experimental prototype.
Keywords
Current supplies; Equivalent Circuit; Immittance Converters; Resonant power conversion; Soft-switching;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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