Resonance based zero-voltage zero-current switching full bridge converter Rouhollah Karimi, Ehsan Adib, Hosein Farzanehfard Department of Electrical and Computer Engineering, Isfahan University of Technology, Iran

Resonance based zero-voltage zero-current switching full bridge converter 

Rouhollah Karimi, Ehsan Adib, Hosein Farzanehfard Department of Electrical and Computer Engineering, Isfahan University of Technology, Iran E-mail: r.karimi@ec.iut.ac.ir

 Abstract: A zero-voltage and zero-current switching full bridge converter with series resonance tank is presented in this study. This converter is based on standard full bridge topology and a series capacitor is added in the primary side to reset the leakage inductance current without any additional auxiliary circuit. Leakage inductance of the transformer is used as the resonance inductance. Using series resonance tank and applying control pulses with fix frequency, zero-voltage switching for leading leg and zero-current switching for lagging leg is achieved. The output power is controlled using phase shift technique. In the proposed converter, soft-switching condition is attained for wide range of load variation. Due to its high performance and minimum additional components with respect to regular converter, this converter can be applied for medium to high-power applications. Topology and operating modes are discussed and the validity of theoretical analysis is verified by prototype experimental results. 

VIEW FULL TEXT : https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/iet-pel.2013.0301

Space High-Voltage Power Module Wenjie Zhao1*, Yuanyuan Jiang1, Jianchao Wu2, Yonghui Huang1, Yan Zhu1, Junshe An1 and Cheng-an Wan2 1 National Space Science Center, The Chinese Academy of Sciences, Beijing, China, 2 China Aerospace Science and Technology Corporation, Beijing, China

 Space High-Voltage Power Module 

Wenjie Zhao1*, Yuanyuan Jiang1, Jianchao Wu2, Yonghui Huang1, Yan Zhu1, Junshe An1 and Cheng-an Wan2 1 National Space Science Center, The Chinese Academy of Sciences, Beijing, China, 2 China Aerospace Science and Technology Corporation, Beijing, China 

ABSTRACT

With the rapid development of the world’s aerospace technologies, a high-power and high-reliability space high-voltage power supply is significantly required by new generation of applications, including high-power electric propulsion, space welding, deep space exploration, and space solar power stations. However, it is quite difficult for space power supplies to directly achieve high-voltage output from the bus, because of the harshness of the space environment and the performance limitations of existing aerospace-grade electronic components. This paper proposes a high-voltage power supply module design for space welding applications, which outputs 1 kV and 200 W when the input is 100 V. This paper also improves the efficiency of the high- voltage converter with a phase-shifted full-bridge series resonant circuit, then simulates the optimized power module and the electric field distribution of the high-voltage circuit board.

VIEW FULL TEXT: https://www.frontiersin.org/articles/10.3389/fenrg.2021.642920/pdf

Powerful Knowledge 9 - Magnetics Design for High Performance Power Converters

 

 Magnetics design is often the most overlooked aspect of the design of power electronic converters. This is episode 9 of our 'Powerful Knowledge' series and we go into some depths of how to approach magnetics design using energy storage as a starting point with an example of a mains input 50W flyback converter running at 100kHz switching frequency. We cover aspects such as winding structure, basic core loss modelling, impacting of fringing fields near the airgap and practical characterization.

급속충전기용 파워 모듈을 위한 단일단 AC-DC 컨버터 레덧탕1, 최세완✝ A Single-Stage AC-DC Power Module Converter for Fast-Charger Tat-Thang LE and Sewan Choi-The Transactions of the Korean Institute of Power Electronics, Vol. 27, No. 5, October 2022

 

급속충전기용 파워 모듈을 위한 단일단 AC-DC 컨버터 레덧탕1 , 최세완✝ 

A Single-Stage AC-DC Power Module Converter for Fast-Charger Tat-Thang LE and Sewan Choi

The Transactions of the Korean Institute of Power Electronics, Vol. 27, No. 5, October 2022

 Abstract 

In this study, a single-stage, four-phase, interleaved, totem-pole AC-DC converter is proposed for a super-fast charger station that requires high power, a wide voltage range, and bidirectional operation capabilities and adopts various types of electric transport vehicles. The proposed topology is based on current-fed push-pull dual active bridge converter combined with the totem-pole operation. Owing to the four-phase interleaving effect, the bridge on the grid side can switch at 0.25, 0.5, and 0.75 to achieve a ripple-free grid current. The input filter can be removed theoretically. Switching methods for the duty of the secondary-side duty cycle are proposed, and they correspond to the primary duty cycle for reducing the circulating power and handling the total harmonic distortion. Therefore, the converter can operate under a wide voltage range. Experimental results from a 7.5 kW prototype are used to validate the proposed concept.

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https://www.kstudy.com/fbook/KIPE/27-5/3.pdf

3.3kW Bidirectional OBC Design with Active Clamp Flyback Converter Hyeok-Min Kwon, So-Jeong Kong, Jae-Hyuck Choi, Dae-Young Hong and Jun-Young Lee† Myongji University Electrical Engineering

3.3kW Bidirectional OBC Design with Active Clamp Flyback Converter Hyeok-Min Kwon, So-Jeong Kong, Jae-Hyuck Choi, Dae-Young Hong and Jun-Young Lee† Myongji University Electrical Engineering 

 액티브 클램프 플라이백 컨버터를 이용한 3.3kW 양방향 OBC 설계 권혁민, 공소정, 최재혁, 홍대영, 이준영† 명지대학교 전기공학과 

 ABSTRACT 

본 논문은 3.3kW급 OBC에 사용되는 DC-DC 양방향 Flyback 컨버터를 제안한다. 기존 Flyback 컨버터에서 보조 스 위치를 사용한 회로를 적용하여 변압기 누설 값에 저장된 에너 지를 재활용하여 메인 스위치 전압 스파이크를 최소화하는 방 식을 사용했고 이를 대칭구조로 적용하였다. 모든 전력반도체 소자는 SiC-MOSFET을 적용하였다. 스위칭 주파수 70kHz 조 건에서 입력전압은 400V이며 배터리 전압 100V, 250V, 330V, 450V 네 구간에서 정상 동작을 확인하였으며 정방향 최대 효 율:97.58%, 역방향 최대 효율 97.48%를 달성하였다.

ABSTRACT

This paper proposes a DC-DC bi-directional flyback converter used in a 3.3kW class OBC. In the existing flyback converter, a circuit using an auxiliary switch was applied to recycle the energy stored in the transformer leakage value to minimize the main switch voltage spike, and this was applied in a symmetrical structure. All power semiconductor devices applied SiC-MOSFETs. Under the condition of the switching frequency of 70kHz, the input voltage was 400V, and normal operation was confirmed in four sections of battery voltage 100V, 250V, 330V, and 450V, and the maximum forward efficiency: 97.58% and the maximum reverse efficiency 97.48% were achieved.

VIEW FULL TEXT:

 http://conf2022s.kipe.or.kr/pdfs/output/OS1.2_%EA%B6%8C%ED%98%81%EB%AF%BC.pdf