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Current Injected Equivalent Circuit Approach to Modeling Switching DC-DC Converters

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1 Author(s)
Chetty, P.R.K. ; Sundstrand Advanced Technology Corporation

A new current injected equivalent circuit approach (CIECA) to modeling switching dc-dc converter power stages is developed, which starts with the current injected approach and results in either a set of equations which completely describe input and out-put properties or an equivalent linear circuit model valid at small signal, low frequency levels. This approach to modeling switching dc-dc converter power stages has the merits but not the demerits of both the electronic equivalent circuit state space average approach and the current injected control type approach, namely, 1) the modeling is very clear and is simple whether the converter operates in continuous or discontinuous inductor conduction modes, 2) the modeling results in an equivalent circuit which is very close to the actual converter, and 3) the equivalent circuit can be used directly in the computer for theoretical predictions like SPICE, etc.

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Aerospace and Electronic Systems, IEEE Transactions on  (Volume:AES-17 ,  Issue: 6 )