Applications and equivalent models for coupled inductor parallel interleaved converters

Finn, David, Walker, Geoff, Sernia, Paul, & Pierce, Jordan (2004) Applications and equivalent models for coupled inductor parallel interleaved converters. In Australasian Universities Power Engineering Conference (AUPEC 2004), 26-29 September 2004, University of Queensland, Brisbane, Australia.


Parallel interleaved converters are finding more applications everyday, for example they are frequently used for VRMs on PC main boards mainly to obtain better transient response.

Parallel interleaved converters can have their inductances uncoupled, directly coupled or inversely coupled, all of which have different applications with associated advantages and disadvantages. Coupled systems offer more control over converter features, such as ripple currents, inductance volume and transient response. To be able to gain an intuitive understanding of which type of parallel interleaved converter, what amount of coupling, what number of levels and how much inductance should be used for different applications a simple equivalent model is needed. As all phases of an interleaved converter are supposed to be identical, the equivalent model is nothing more than a separate inductance which is common to all phases. Without utilising this simplification the design of a coupled system is quite daunting.

Being able to design a coupled system involves solving and understanding the RMS currents of the input, individual phase (or cell) and output. A procedure using this equivalent model and a small amount of modulo arithmetic is detailed.

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ID Code: 63563
Item Type: Conference Paper
Refereed: Yes
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2004 [please consult the authors]
Deposited On: 11 Dec 2014 23:57
Last Modified: 11 Dec 2014 23:57

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