Design of high power density isolated DC-DC converter

The fast development in the Internet of Things (IoT) and cloud computing have caused a greater demand of server power supplies. In this project, the focus is designing an Isolated DC-DC converter to improve on the power areas by reducing the pressure on the data servers when delivering sufficient am...

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Main Author: Tan, Jia Hui
Other Authors: Siek Liter
Format: Final Year Project
Language:English
Published: 2016
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Online Access:http://hdl.handle.net/10356/67841
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-678412023-07-07T17:14:48Z Design of high power density isolated DC-DC converter Tan, Jia Hui Siek Liter School of Electrical and Electronic Engineering DRNTU::Engineering The fast development in the Internet of Things (IoT) and cloud computing have caused a greater demand of server power supplies. In this project, the focus is designing an Isolated DC-DC converter to improve on the power areas by reducing the pressure on the data servers when delivering sufficient amount of power for the rising needs. Several SMPS resonant topologies to develop an isolated DC-DC converter such as Series-Resonant, Parallel-Resonant, LCC Resonant and LLC Resonant were researched and discussed. LLC Resonant Converter topology was adopted. LLC resonant topology has the capability of reducing switching losses of the MOSFETs with wide input voltage range, and achieving high power density and efficiency of the converter. This isolated DC-DC converter consists of several stages, mainly the switching network, LLC resonant tank, full-wave rectifier and an output filter. The DC-AC section includes a switching network which uses rectangular pulses from a PFM-technique controller to switch the two power MOSFETs simultaneously. The LLC resonant tank ensures the resonant frequency is in the ZVS region to reduce switching losses as high power density and efficiency are the focuses of this project. In AC-DC section, a full-wave rectifier converts the AC waveform from the transformer back into a DC output voltage and an output filter would eliminate the voltage ripples and noises to provide a stable supply for the servers. The main features of this circuit compared to the other designs is that the selection of the power MOSFETs in the switching network which could supports high input voltage up to 500V and high switching frequency of 200 kHz. The simulation results of the isolated DC-DC converter were obtained and analysed. It is designed with a high input voltage of 380Vdc and a 12.8Vdc and 15.8A at the output of the converter. A total output power of 202.24W is obtained with a high efficiency of 94.5% during the software simulation. A software simulation model of the isolated DC-DC converter with result is presented. Bachelor of Engineering 2016-05-21T07:20:15Z 2016-05-21T07:20:15Z 2016 Final Year Project (FYP) http://hdl.handle.net/10356/67841 en Nanyang Technological University 54 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Tan, Jia Hui
Design of high power density isolated DC-DC converter
description The fast development in the Internet of Things (IoT) and cloud computing have caused a greater demand of server power supplies. In this project, the focus is designing an Isolated DC-DC converter to improve on the power areas by reducing the pressure on the data servers when delivering sufficient amount of power for the rising needs. Several SMPS resonant topologies to develop an isolated DC-DC converter such as Series-Resonant, Parallel-Resonant, LCC Resonant and LLC Resonant were researched and discussed. LLC Resonant Converter topology was adopted. LLC resonant topology has the capability of reducing switching losses of the MOSFETs with wide input voltage range, and achieving high power density and efficiency of the converter. This isolated DC-DC converter consists of several stages, mainly the switching network, LLC resonant tank, full-wave rectifier and an output filter. The DC-AC section includes a switching network which uses rectangular pulses from a PFM-technique controller to switch the two power MOSFETs simultaneously. The LLC resonant tank ensures the resonant frequency is in the ZVS region to reduce switching losses as high power density and efficiency are the focuses of this project. In AC-DC section, a full-wave rectifier converts the AC waveform from the transformer back into a DC output voltage and an output filter would eliminate the voltage ripples and noises to provide a stable supply for the servers. The main features of this circuit compared to the other designs is that the selection of the power MOSFETs in the switching network which could supports high input voltage up to 500V and high switching frequency of 200 kHz. The simulation results of the isolated DC-DC converter were obtained and analysed. It is designed with a high input voltage of 380Vdc and a 12.8Vdc and 15.8A at the output of the converter. A total output power of 202.24W is obtained with a high efficiency of 94.5% during the software simulation. A software simulation model of the isolated DC-DC converter with result is presented.
author2 Siek Liter
author_facet Siek Liter
Tan, Jia Hui
format Final Year Project
author Tan, Jia Hui
author_sort Tan, Jia Hui
title Design of high power density isolated DC-DC converter
title_short Design of high power density isolated DC-DC converter
title_full Design of high power density isolated DC-DC converter
title_fullStr Design of high power density isolated DC-DC converter
title_full_unstemmed Design of high power density isolated DC-DC converter
title_sort design of high power density isolated dc-dc converter
publishDate 2016
url http://hdl.handle.net/10356/67841
_version_ 1772827914229776384