Novel Control Method for Ultra-High Step-Down Converter

Chuang Wei Tseng; Jain Hong Liu; Ching Tsai Pan; Chia Chi Chu

doi:10.1109/IAS.2019.8912364

Novel Control Method for Ultra-High Step-Down Converter

Chuang Wei Tseng
, Jain Hong Liu
, Ching Tsai Pan
, Chia Chi Chu

National Tsing Hua University
Yuan Ze University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

A novel dual PWM control method for achieving an ultra-high step-down DC-DC converter is proposed. Both high-frequency and low-frequency PWM waveform generators are used in synthesizing the dual PWM control of buck converters. This resulting PWM waveform will lead to various switching cycles, and five operation modes of the buck converter can be defined accordingly. The operation principle of the proposed converter and its small-signal switched model are studied in details. One salient feature of the proposed design is that if the duty cycle of the high-frequency PWM is exactly equal to that of the low-frequency PWM, by exploring the volt-sec balance condition, the voltage gain can be expressed as the quadratic formula of the duty cycle. Thus, an ultra-high step-down conversion ratio and significant reductions of the inductor current ripple can be ensured simultaneously. Since no modifications of the conventional circuit topology are made, the proposed scheme is very cost effective. Simulation studies and hardware prototype circuit implementations are conducted to validate the proposed design with satisfactory performance.

Original language	English
Title of host publication	2019 IEEE Industry Applications Society Annual Meeting, IAS 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538645390
DOIs	https://doi.org/10.1109/IAS.2019.8912364
State	Published - 09 2019
Externally published	Yes
Event	2019 IEEE Industry Applications Society Annual Meeting, IAS 2019 - Baltimore, United States Duration: 29 09 2019 → 03 10 2019

Publication series

Name	2019 IEEE Industry Applications Society Annual Meeting, IAS 2019

Conference

Conference	2019 IEEE Industry Applications Society Annual Meeting, IAS 2019
Country/Territory	United States
City	Baltimore
Period	29/09/19 → 03/10/19

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

Keywords

Buck converter
dual PWM control
small-signal analysis
ultra-high step-down conversion ratio

Access to Document

10.1109/IAS.2019.8912364

Cite this

@inproceedings{f0806bc92e544b2ab9b08c2ef5c80369,

title = "Novel Control Method for Ultra-High Step-Down Converter",

abstract = "A novel dual PWM control method for achieving an ultra-high step-down DC-DC converter is proposed. Both high-frequency and low-frequency PWM waveform generators are used in synthesizing the dual PWM control of buck converters. This resulting PWM waveform will lead to various switching cycles, and five operation modes of the buck converter can be defined accordingly. The operation principle of the proposed converter and its small-signal switched model are studied in details. One salient feature of the proposed design is that if the duty cycle of the high-frequency PWM is exactly equal to that of the low-frequency PWM, by exploring the volt-sec balance condition, the voltage gain can be expressed as the quadratic formula of the duty cycle. Thus, an ultra-high step-down conversion ratio and significant reductions of the inductor current ripple can be ensured simultaneously. Since no modifications of the conventional circuit topology are made, the proposed scheme is very cost effective. Simulation studies and hardware prototype circuit implementations are conducted to validate the proposed design with satisfactory performance.",

keywords = "Buck converter, dual PWM control, small-signal analysis, ultra-high step-down conversion ratio",

author = "Tseng, \{Chuang Wei\} and Liu, \{Jain Hong\} and Pan, \{Ching Tsai\} and Chu, \{Chia Chi\}",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 2019 IEEE Industry Applications Society Annual Meeting, IAS 2019 ; Conference date: 29-09-2019 Through 03-10-2019",

year = "2019",

month = sep,

doi = "10.1109/IAS.2019.8912364",

language = "英语",

series = "2019 IEEE Industry Applications Society Annual Meeting, IAS 2019",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "2019 IEEE Industry Applications Society Annual Meeting, IAS 2019",

address = "美国",

}

Tseng, CW, Liu, JH, Pan, CT & Chu, CC 2019, Novel Control Method for Ultra-High Step-Down Converter. in 2019 IEEE Industry Applications Society Annual Meeting, IAS 2019., 8912364, 2019 IEEE Industry Applications Society Annual Meeting, IAS 2019, Institute of Electrical and Electronics Engineers Inc., 2019 IEEE Industry Applications Society Annual Meeting, IAS 2019, Baltimore, United States, 29/09/19. https://doi.org/10.1109/IAS.2019.8912364

Novel Control Method for Ultra-High Step-Down Converter. / Tseng, Chuang Wei; Liu, Jain Hong; Pan, Ching Tsai et al.
2019 IEEE Industry Applications Society Annual Meeting, IAS 2019. Institute of Electrical and Electronics Engineers Inc., 2019. 8912364 (2019 IEEE Industry Applications Society Annual Meeting, IAS 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Novel Control Method for Ultra-High Step-Down Converter

AU - Tseng, Chuang Wei

AU - Liu, Jain Hong

AU - Pan, Ching Tsai

AU - Chu, Chia Chi

PY - 2019/9

Y1 - 2019/9

N2 - A novel dual PWM control method for achieving an ultra-high step-down DC-DC converter is proposed. Both high-frequency and low-frequency PWM waveform generators are used in synthesizing the dual PWM control of buck converters. This resulting PWM waveform will lead to various switching cycles, and five operation modes of the buck converter can be defined accordingly. The operation principle of the proposed converter and its small-signal switched model are studied in details. One salient feature of the proposed design is that if the duty cycle of the high-frequency PWM is exactly equal to that of the low-frequency PWM, by exploring the volt-sec balance condition, the voltage gain can be expressed as the quadratic formula of the duty cycle. Thus, an ultra-high step-down conversion ratio and significant reductions of the inductor current ripple can be ensured simultaneously. Since no modifications of the conventional circuit topology are made, the proposed scheme is very cost effective. Simulation studies and hardware prototype circuit implementations are conducted to validate the proposed design with satisfactory performance.

AB - A novel dual PWM control method for achieving an ultra-high step-down DC-DC converter is proposed. Both high-frequency and low-frequency PWM waveform generators are used in synthesizing the dual PWM control of buck converters. This resulting PWM waveform will lead to various switching cycles, and five operation modes of the buck converter can be defined accordingly. The operation principle of the proposed converter and its small-signal switched model are studied in details. One salient feature of the proposed design is that if the duty cycle of the high-frequency PWM is exactly equal to that of the low-frequency PWM, by exploring the volt-sec balance condition, the voltage gain can be expressed as the quadratic formula of the duty cycle. Thus, an ultra-high step-down conversion ratio and significant reductions of the inductor current ripple can be ensured simultaneously. Since no modifications of the conventional circuit topology are made, the proposed scheme is very cost effective. Simulation studies and hardware prototype circuit implementations are conducted to validate the proposed design with satisfactory performance.

KW - Buck converter

KW - dual PWM control

KW - small-signal analysis

KW - ultra-high step-down conversion ratio

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DO - 10.1109/IAS.2019.8912364

M3 - 会议稿件

AN - SCOPUS:85076747582

T3 - 2019 IEEE Industry Applications Society Annual Meeting, IAS 2019

BT - 2019 IEEE Industry Applications Society Annual Meeting, IAS 2019

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2019 IEEE Industry Applications Society Annual Meeting, IAS 2019

Y2 - 29 September 2019 through 3 October 2019

ER -

Novel Control Method for Ultra-High Step-Down Converter

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