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引用次数: 0
摘要
本文提出了一种具有高电压转换率和软开关能力的扩展直流-直流转换器。该转换器在传统的高增益转换器中加入了有源开关电感器和开关电容器，并以连续导通模式（CCM）运行。在转换器的初级脚上添加了简单的辅助谐振元件，为软开关操作提供了设计自由度。该转换器的主要优点是电压和电流应力较小、电压增益高、元件数量少、效率高。该转换器的另一个特点是可在不同负载条件和占空比下进行软开关操作，而不会大幅增加应力。所有开关器件均可实现零电压开关（ZVS）接通操作。因此，开关功率损耗大大降低。本文介绍了与现有高增益转换器比较的说明、工作原理和稳态分析。输入电压为 20 V，输出电压为 220 V，350 W 的原型验证了理论分析。获得的结果证实了 ZVZCS 在满负荷下的运行。
Extended high gain DC-DC converter with switched-inductors, switched-capacitors and soft-switching: Analysis and implementation
This paper proposes an extended DC-DC converter with high voltage conversion ratio and soft-switching ability. The proposed converter has active switched-inductors, switched-capacitors included in the conventional high gain converter and operates in continuous conduction mode (CCM). Simple auxiliary resonant elements are added on the primary leg of the converter to provide design freedom for soft-switching operation. The significant merits of the proposed converter are lesser voltage and current stresses, high voltage gain with reduced component count and better efficiency. Additional feature of this converter is soft-switching operation under different load conditions and duty ratios without considerably increasing stresses. The zero voltage switching (ZVS) turn-on operation is obtained for all switching devices. Therefore, switching power losses are minimized greatly. This paper presents the description, principles of operation and steady state analysis in comparison with the existing high gain converters. The theoretical analysis is verified with a 350 W prototype operated at input is 20 V and output is 220 V. The overall efficiency achieved is 96.7%. The obtained results confirm ZVZCS operation at full load.
期刊介绍：
IET Power Electronics aims to attract original research papers, short communications, review articles and power electronics related educational studies. The scope covers applications and technologies in the field of power electronics with special focus on cost-effective, efficient, power dense, environmental friendly and robust solutions, which includes:
Applications:
Electric drives/generators, renewable energy, industrial and consumable applications (including lighting, welding, heating, sub-sea applications, drilling and others), medical and military apparatus, utility applications, transport and space application, energy harvesting, telecommunications, energy storage management systems, home appliances.
Technologies:
Circuits: all type of converter topologies for low and high power applications including but not limited to: inverter, rectifier, dc/dc converter, power supplies, UPS, ac/ac converter, resonant converter, high frequency converter, hybrid converter, multilevel converter, power factor correction circuits and other advanced topologies.
Components and Materials: switching devices and their control, inductors, sensors, transformers, capacitors, resistors, thermal management, filters, fuses and protection elements and other novel low-cost efficient components/materials.
Control: techniques for controlling, analysing, modelling and/or simulation of power electronics circuits and complete power electronics systems.
Design/Manufacturing/Testing: new multi-domain modelling, assembling and packaging technologies, advanced testing techniques.
Environmental Impact: Electromagnetic Interference (EMI) reduction techniques, Electromagnetic Compatibility (EMC), limiting acoustic noise and vibration, recycling techniques, use of non-rare material.
Education: teaching methods, programme and course design, use of technology in power electronics teaching, virtual laboratory and e-learning and fields within the scope of interest.
Special Issues. Current Call for papers:
Harmonic Mitigation Techniques and Grid Robustness in Power Electronic-Based Power Systems - https://digital-library.theiet.org/files/IET_PEL_CFP_HMTGRPEPS.pdf
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