DC–DC converter with a high step-down ratio for water desalination applications

Research output: Contribution to journalConference Contribution

Abstract

A single-stage 600 : 1 ratio voltage step-down dc–dc converter designed to produce a voltage of between 1 and 1.5 V from a rectified single/three-phase AC supply, for application in a desalination process, is presented. A coupled-inductor design is used, and a novel snubber circuit with energy recovery manages the effects of imperfect coupling (leakage) between the coupled windings. The circuit, which is bidirectional, allows for the power devices to be rated for either high current or high voltage. This presents significant cost and performance advantages compared to a conventional single-stage buck converter where such a large step-down ratio would require a small duty ratio and components with high ratings for both voltage and current: in this case, ratings of 1200 V to withstand input dc voltage switching, and 1000 A to deliver the output current, would be required.

Fingerprint

DC-DC converters
Desalination
Electric potential
Water
Networks (circuits)
Recovery
Costs

Keywords

  • DC-DC converters
  • desalination
  • power electronics

Cite this

@article{d761f56c2978430eb1116e52e36820ac,
title = "DC–DC converter with a high step-down ratio for water desalination applications",
abstract = "A single-stage 600 : 1 ratio voltage step-down dc–dc converter designed to produce a voltage of between 1 and 1.5 V from a rectified single/three-phase AC supply, for application in a desalination process, is presented. A coupled-inductor design is used, and a novel snubber circuit with energy recovery manages the effects of imperfect coupling (leakage) between the coupled windings. The circuit, which is bidirectional, allows for the power devices to be rated for either high current or high voltage. This presents significant cost and performance advantages compared to a conventional single-stage buck converter where such a large step-down ratio would require a small duty ratio and components with high ratings for both voltage and current: in this case, ratings of 1200 V to withstand input dc voltage switching, and 1000 A to deliver the output current, would be required.",
keywords = "DC-DC converters, desalination, power electronics",
author = "Pollock, {Richard C.} and Neville McNeill and Derrick Holliday and Williams, {Barry W.}",
year = "2019",
month = "6",
day = "30",
doi = "10.1049/joe.2018.8039",
language = "English",
volume = "2019",
pages = "4545 – 4549",
journal = "The Journal of Engineering",
issn = "2051-3305",
number = "17",

}

DC–DC converter with a high step-down ratio for water desalination applications. / Pollock, Richard C.; McNeill, Neville; Holliday, Derrick; Williams, Barry W.

In: The Journal of Engineering, Vol. 2019, No. 17, 30.06.2019, p. 4545 – 4549.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - DC–DC converter with a high step-down ratio for water desalination applications

AU - Pollock, Richard C.

AU - McNeill, Neville

AU - Holliday, Derrick

AU - Williams, Barry W.

PY - 2019/6/30

Y1 - 2019/6/30

N2 - A single-stage 600 : 1 ratio voltage step-down dc–dc converter designed to produce a voltage of between 1 and 1.5 V from a rectified single/three-phase AC supply, for application in a desalination process, is presented. A coupled-inductor design is used, and a novel snubber circuit with energy recovery manages the effects of imperfect coupling (leakage) between the coupled windings. The circuit, which is bidirectional, allows for the power devices to be rated for either high current or high voltage. This presents significant cost and performance advantages compared to a conventional single-stage buck converter where such a large step-down ratio would require a small duty ratio and components with high ratings for both voltage and current: in this case, ratings of 1200 V to withstand input dc voltage switching, and 1000 A to deliver the output current, would be required.

AB - A single-stage 600 : 1 ratio voltage step-down dc–dc converter designed to produce a voltage of between 1 and 1.5 V from a rectified single/three-phase AC supply, for application in a desalination process, is presented. A coupled-inductor design is used, and a novel snubber circuit with energy recovery manages the effects of imperfect coupling (leakage) between the coupled windings. The circuit, which is bidirectional, allows for the power devices to be rated for either high current or high voltage. This presents significant cost and performance advantages compared to a conventional single-stage buck converter where such a large step-down ratio would require a small duty ratio and components with high ratings for both voltage and current: in this case, ratings of 1200 V to withstand input dc voltage switching, and 1000 A to deliver the output current, would be required.

KW - DC-DC converters

KW - desalination

KW - power electronics

U2 - 10.1049/joe.2018.8039

DO - 10.1049/joe.2018.8039

M3 - Conference Contribution

VL - 2019

SP - 4545

EP - 4549

JO - The Journal of Engineering

T2 - The Journal of Engineering

JF - The Journal of Engineering

SN - 2051-3305

IS - 17

ER -