PUKYONG

GUIDE OAK 국가리포지터리 부경대학교

검색

PUKYONG Repository 산업대학원 전기공학과

Metadata Downloads

Alternative Title: Design of Low Voltage High Current LLC Resonant Converter for Green PC

Abstract: Green PC is composed of a lot of blade PCs, and it is a centralized system to manage them in computer center. Green PC should require that its power supplies have several characteristics such as low output voltage, high output current, and high power conversion efficiency.
Conventional PSFB (Phase Shift Full Bridge) converter is usually used as DC/DC converter for computer power supply because it has high power conversion efficiency thanks to ZVS (Zero Voltage Switching) operation under middle and high load conditions. However, this converter has some problems such as large switching noise and limitation of ZVS operation under light load condition.
In order to improve the performance of power supply for Green PC, a new power supply using popular high efficiency LLC resonant converter for low voltage and high current application is proposed in this paper. The proposed power supply has ZVS capability over the entire load range, thus resulting in good efficiency and high switching frequency. Experimental results verify the performance of the proposed power supply for Green PC using 2kW (19V, 105A) rated prototype converter

URI: https://repository.pknu.ac.kr:8443/handle/2021.oak/24767
http://pknu.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000001966146

Table Of Contents: 그림목차 ⅲ
표 목 차 ⅴ
Abstract ⅵ

1. 서 론 1

2. Full-Bridge LLC 공진형 컨버터 Power Stage 설계 5
2-1. 특징 및 동작원리 5
2-2. 설계사양 7
2-3. 설계 알고리즘 8
2-4. Power Stage 설계 9
2-5. 공진 네트워크 설계 및 시뮬레이션 11
2-5-1. 공진네트워크 최소, 최대 이득 산정 11
2-5-2. 변압기 권선비 산정 13
2-5-3. AC 등가 부하 저항값 산정 14
2-5-4. 공진 네트워크 값 산정 17
2-5-5. 공진 네트워크 Pspice 시뮬레이션 20
2-5-6. 변압기 설계 21
2-5-7. 공진 커패시터 설계 23
2-6. 출력측 동기 정류단 설계 25

3. Full-Bridge LLC 공진형 컨버터 전압 보상기 설계 27
3-1. 주파수 대 출력 전달 함수 27
3-2. 2극점 1영점 전압 보상기 설계 29
3-3. PSM1735를 이용한 Loop Gain 측정 32
4. Full-Bridge LLC 공진형 컨버터 병렬운전 제어 34

5. 실험 결과 35
5-1. 단일 모듈 35
5-1-1. 효율 특성 비교 38
5-2. 병렬 모듈 39

6. 결 론 42

참 고 문 헌 43

Authorize & License

qrcode