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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Soft-Switching Bridgeless Buck–Boost PFC Converter Using Single Magnetic Core
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Soft-Switching Bridgeless Buck–Boost PFC Converter Using Single Magnetic Core

机译:使用单磁芯的软切换无灰度降压-BOOST PFC转换器

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摘要

In this article, a new bridgeless single-phase buck-boost power factor correction (PFC) converter with one magnetic core is introduced. The proposed converter is designed to operate in discontinuous capacitor voltage mode (DCVM) to achieve low total harmonic distortion (THD) and continuous input current with a simple structure. The DCVM operation gives additional advantages, such as inherent PFC, low turn-off losses, and reduced complexity of the control circuitry. Unlike the buck converter, the proposed converter eliminates the dead angle of input current without adding any extra circuits. Also, by eliminating two input diodes in power flowing path, the efficiency is further improved. Due to achieved almost zero current switching at the turn-on and almost zero voltage switching at the turn-off, the switching losses are eliminated. In this article, theoretical analysis and principal operation of the converter are discussed. An experimental prototype is implemented to verify the performance of the proposed converter. Experimental results are presented for a 120-W prototype at 110-V-rms input and 48-V output.
机译:在本文中,引入了一种新的无灰度单相降压 - 升压功率因数校正(PFC)转换器,具有一个磁芯。所提出的转换器设计用于不连续电容器电压模式(DCVM),以实现具有简单结构的低总谐波失真(THD)和连续输入电流。 DCVM操作提供了额外的优点,例如固有的PFC,低关断损耗以及控制电路的复杂性降低。与降压转换器不同,所提出的转换器消除了输入电流的死角而不添加任何额外电路。而且,通过消除功率流动路径中的两个输入二极管,效率进一步提高。由于在关闭时达到几乎零电流切换,几乎零电压切换在关闭时,消除了开关损耗。在本文中,讨论了转换器的理论分析和主要操作。实施实验原型以验证所提出的转换器的性能。在110V-RMS输入和48V输出时,在120-W原型提出了实验结果。

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