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【24h】ZVT Resonant Core Reset Forward Converter With a Simple Auxiliary Circuit

机译具有简单辅助电路的ZVT谐振铁芯复位正激转换器

【摘要】In this paper, a new zero-voltage switching and resonant core reset pulse width modulation forward converter with a simple auxiliary circuit is introduced. The proposed auxiliary circuit can be applied to both single-switch and two-switch forward converters. The main and the auxiliary mosfets of the proposed converters operate under soft switching condition independent of line and load variation. Also, due to the capability of operating at duty cycles higher than 0.5, the proposed converters can be used for wide input voltage applications. In comparison to the existing zero-voltage transition (ZVT) forward converters, this auxiliary circuit has low number of components and also does not require any additional magnetic element which has improved the power density. The proposed converter is compared with exiting ZVT forward converters in details. The converter steady-state operation is analyzed and various operating modes are explained. Also, in addition to a design example, a comprehensive design procedure is presented. The experimental results of a laboratory prototype of the converter with 85-180 V input voltage and 24 V output voltage at 150 W are provided which verify the theoretical analysis and confirm the converter operation. The overall efficiency of 93.5% is achieved for the proposed converter at full load.

【摘要机译】本文介绍了一种新型的具有简单辅助电路的零电压开关和谐振核心复位脉宽调制正激变换器。所提出的辅助电路可以同时应用于单开关和双开关正激转换器。所提出的转换器的主MOSFET和辅助MOSFET在软开关条件下工作,与线路和负载变化无关。同样,由于能够以高于0.5的占空比工作,因此建议的转换器可用于宽输入电压应用。与现有的零电压过渡(ZVT)前向转换器相比,该辅助电路的组件数量少,并且不需要任何其他可提高功率密度的磁性元件。将拟议的转换器与现有的ZVT正向转换器进行详细比较。分析了转换器的稳态运行并解释了各种运行模式。此外,除了一个设计实例,还提出了一个全面的设计程序。提供了转换器电压为85-180 V,输出电压为150 V时为24 V的转换器的实验室原型的实验结果,验证了理论分析并确认了转换器的运行。拟议的转换器在满负载下的总效率达到93.5%。

【作者】Ramin Rahimzadeh Khorasani;Ehsan Adib;Hosein Farzanehfard;

【作者单位】;

【年(卷),期】2018(65),1

【年度】2018

【页码】242-250

【总页数】9

【原文格式】PDF

【正文语种】eng

【中图分类】;

【关键词】Switches;Soft switching;Inductors;Zero voltage switching;Zero current switching;Capacitors;

机译 开关;软开关;电感器;零电压开关;零电流开关;电容器;
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