Comparative analysis of the large and small signal responses of "AC inductor" and "DC inductor" based chargers

Ilya Zeltser, Sam Ben-Yaakov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Two approaches of operating inductors in switched mode power converters are compared. The classic method, utilized in most PWM converters, is to place the inductor in a path that has a non-zero average current. Such inductors are referred to here as "DC inductors". In contrast, inductors that operate with zero average current are denoted "AC inductors". The theoretical analysis carried out in this paper compares the small signal response of the current in the DC and AC inductors as a function of various system parameters, such as input and output voltages and duty cycle, in the case of the DC inductor, and frequency in the case of the AC inductor. The analysis was supported by large and small signal model developed in this study and verified against analytically derived large and small signal equations. The small signal current response was derived by applying average models. The analytical derivations and simulations of this study were verified experimentally. Good agreement was found between the theoretical predications and the analytical results. Based on the results of this study one can conclude that "AC inductor" based topologies are optimal for current sourcing applications, such as battery chargers, where differences between the average input and output voltages are expected to exist and develop over time.

Original languageEnglish
Title of host publication2006 IEEE 24th Convention of Electrical and Electronics Engineers in Israel, IEEEI
Pages418-422
Number of pages5
DOIs
StatePublished - 1 Dec 2006
Event2006 IEEE 24th Convention of Electrical and Electronics Engineers in Israel, IEEEI - Eilat, Israel
Duration: 15 Nov 200617 Nov 2006

Publication series

NameIEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings

Conference

Conference2006 IEEE 24th Convention of Electrical and Electronics Engineers in Israel, IEEEI
Country/TerritoryIsrael
CityEilat
Period15/11/0617/11/06

Keywords

  • Average model
  • Battery chargers
  • DC-DC conversion
  • Small-signal response

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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