Laplace transform-based theoretical foundations and experimental validation-low frequency supercapacitor circulation for efficiency improvements in linear regulators

Date
2012-11-01
Authors
Kankanamge, K
Kularatna, N
Steyn-Ross, DA
Supervisor
Item type
Journal Article
Degree name
Journal Title
Journal ISSN
Volume Title
Publisher
The Institution of Engineering and Technology
Abstract

Supercapacitor circulation techniques can be used to improve the end-to-end efficiency of linear regulators based on commercial low drop-out regulators (LDO). In this approach, one or more supercapacitors are used in series and parallel to the input of an LDO IC, and circulated at a very low frequency to increase the end-to-end efficiency by a multiplication factor compared with the efficiency of a linear regulator circuit with the same input–output voltages. This study presents the essential theory of supercapacitor circulation, together with analytical results and comparisons with experimental measurements from a practical 12–5 V implementation. The new technique achieved overall end-to-end efficiencies in the range of 70 to 80%, compared with the maximum theoretical efficiency of 42% for a 12–5 V linear regulator.

Description
Keywords
Other energy storage , Integral transforms , Capacitors , Power electronics, supply and supervisory circuits
Source
IET Power Electronics, Volume 5, Issue 9, November 2012, p. 1785 – 1792
Publisher's version
Rights statement
This paper is a postprint of a paper submitted to and accepted for publication in [Citation] and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library.