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- 검색키워드
- 저자 : Farzad Sedaghati (검색결과 2 건)
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Switched Inductor Z-Source AC-DC Converter
Sedaghati, Farzad,Hosseini, Seyed Hossein,Sarhangzadeh, Mitra Journal of International Conference on Electrical 2012 Journal of international Conference on Electrical Vol.1 No.1
Due to the increasing amount of applications of power electronic ac-dc converters, it is necessary to design a single-stage converter that can reliably perform both buck and boost operations. Traditionally, this can be achieved by double-stage conversion (ac/dc-dc/dc) which ultimately leads to less efficiency and a more complex control system. This paper discusses two types of modern ac-dc converters. First, the novel impedance-source ac-dc converter, abbreviated as custom Z-source rectifier, is analyzed; and then, switched inductor (SL) Z-source ac-dc converter is proposed. This paper describes the Z-source rectifiers' operating principles, the concepts behind them, and their superiorities. Analysis and simulation results show that the proposed custom Z-source rectifier can step up and step down voltage; and the main advantage of the SL Z-source ac-dc converter is its high step-up capability. Low ripple of the output dc voltage is the other advantage of the proposed converters. Finally, the SL Z-source ac-dc converter is compared with the custom Z-source ac-dc converter.
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A Modular DC-DC Converter with Zero Voltage Switching Capability
Seyed Hossein Hosseini,Farzad Sedaghati,Mehran Sabahi,G. B. Gharehpetian 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
A Modular DC-DC converter with a high-frequency link and bidirectional power flow capability is presented in this paper. Zero voltage switching (ZVS) operation without using any auxiliary circuit, is one of the most important specifications of the proposed modular DC-DC converter. Also, compatibility for high power applications and less number of switching devices are the other merits of the proposed converter. ZVS analysis of the modular converters is necessary because of their high power applications and high number of power switches. The ZVS condition of the proposed modular DC-DC converter is studied and its criteria are derived in detail. The operation principle of the proposed converter, and its ZVS operation are verified using both simulation and experimental measurement.
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