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가변 스위칭 방식을 적용한 마일드 하이브리드 차량용 양방향 DC-DC 컨버터의 디지털 제어

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Author(s)
원창현
Issued Date
2016
Abstract
ABSTRACT
Digital Variable Switching Frequency Control of the Bi-directional DC-DC Converter for Mild-Hybrid Electric Vehicle

Chang-Hyun Won
Advisor : Prof. Seongjun Lee, Ph.D.
Department of Automotive Engineering
Graduate School of Industrial Technology
Recently, the research and development of the 48V mild hybrid electric vehicle have been progressed to achieve the fuel economy and to reduce the exhaust gas due to a low cost solution compared to the full hybrid and battery electric vehicle. In the mild hybrid electric vehicle, the 48V electrical system which is composed of the starter-generator, the lithium battery and the DC-DC converter is newly added to the conventional 12V electrical system. Because the conventional generator in the 12V electrical system is substituted to the 48V starter-generator for charging the 48V lithium battery, the DC-DC converter is utilized as an energy conversion device for charging the lead acid battery of the conventional 12V electrical system.
The bi-directional power-flow control method using the 2 analog integrated circuit(IC) chips is conventionally studied. One IC is utilized to stabilize the 12V lead acid battery using the 48V lithium battery source during the step down operation mode. On the other hand, the other IC is utilized to stabilize the 48V lithium battery using the 12V battery source during the step-up operation mode. However, there is a problem to raise the device cost due to increasing the component counts, and also to reduce the power density of the converter due to increase the size of the printed control board (PCB). Also, although EMI noise mitigation method using the dedicated IC was studied, this causes a problem of increasing the cost and size.
Therefore, this paper proposes the digital variable switching frequency control method using the micro-controller. Because the functions of the step-up, step-down control operation and variable switching frequency using the linear congruential generator (LCG) are integrated for achieving the low cost and increasing the power density of the DC-DC converter. The proposed method is verified through the simulation software testbed using MATLAB/SIMULINK.
Alternative Title
Digital Variable Switching Frequency Control of the Bi-directional DC-DC Converter for Mild-Hybrid Electric Vehicle
Alternative Author(s)
Won, Chang Hyun
Affiliation
조선대학교 산업융합기술대학원
Department
산업기술융합대학원 융합자동차공학과
Advisor
이성준
Awarded Date
2017. 2
Table Of Contents
목 차

제 1 장 서 론 1
1.1. 연구배경 및 필요성 1
1.2. 연구목적 및 내용 8
1.3. 논문의 구성 9
제 2 장 하프브릿지 양방향 벅-부스트 컨버터 설계 10
2.1. 컨버터 설계 플로우 차트 10
2.2. 컨버터 하드웨어 설계 결과 15
제 3 장 가변 스위칭 디지털 제어기 설계 및 모의 실험 결과 18
3.1. 가변 스위칭 주파수 생성 18
3.2. 디지털 제어기 설계 20
3.3. 모의 실험 결과 24
제 4 장 결 론 27
참 고 문 헌 29
Degree
Master
Publisher
조선대학교 산업융합기술대학원
Citation
원창현. (2016). 가변 스위칭 방식을 적용한 마일드 하이브리드 차량용 양방향 DC-DC 컨버터의 디지털 제어
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/1956
http://chosun.dcollection.net/common/orgView/200000265925
Appears in Collections:
Engineering > Theses(Master)(산업기술창업대학원)
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