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.