A Family of Isolated Buck-Boost Converters Based on Semiactive Rectifiers for High-Output Voltage Applications
A Family of Isolated Buck-Boost Converters Based on Semiactive Rectifiers for High-Output Voltage Applications
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适用于高输出电压应用的一系列基于半有源整流器的隔离式降压-升压转换器
DOI：
10.1109/tpel.2015.2501405
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发表时间：
2016-09-01
影响因子：
6.7
通讯作者：
Xing, Yan
中科院分区：
文献类型：
--
作者：
Lu, Yangjun;Wu, Hongfei;Xing, Yan
本文提出了一种系统的方法，用于开发隔离降压升压（伊布）转换器，和单级功率转换，软开关操作，和高效率的性能，可以实现与建议的转换器的家庭。在非隔离双开关Buck-Boost变换器的基础上，将非IBB变换器中的直流降压单元和升压单元分别替换为交流降压单元和升压单元，从而得到了IBB变换器。此外，一个家庭的半有源整流器（SAR）的建议，作为副边整流电路的伊布转换器，这有助于扩大转换器的电压增益，并减少在整流电路中的设备上的电压应力。因此，通过采用具有较小匝数比和减小的寄生参数的Transformer，通过使用具有更好的开关和传导性能的低电压额定值MOSFET和二极管，提高了效率。以全桥伊布变换器为例进行了详细分析。将移相调制策略应用于全桥伊布变换器，实现伊布变换。此外，软开关性能的所有有源开关管和二极管可以实现在一个宽的负载和电压范围内，建议的转换器和控制策略。一个380 V输出的原型制作，以验证所提出的家庭的伊布转换器，SAR，和控制策略的有效性。
A systematic method for developing isolated buck-boost (IBB) converters is proposed in this paper, and single-stage power conversion, soft-switching operation, and high-efficiency performance can be achieved with the proposed family of converters. On the basis of a nonisolated two-switch buck-boost converter, the proposed IBB converters are generated by replacing the dc buck-cell and boost-cell in the non-IBB converter with the ac buck-cell and boost-cell, respectively. Furthermore, a family of semiactive rectifiers (SARs) is proposed to serve as the secondary rectification circuit for the IBB converters, which helps to extend the converter voltage gain and reduce the voltage stresses on the devices in the rectification circuit. Hence, the efficiency is improved by employing a transformer with a smaller turns ratio and reduced parasitic parameters, by using low-voltage rating MOSFETs and diodes with better switching and conduction performances. A full-bridge IBB converter is proposed and analyzed in detail as an example. The phase-shift modulation strategy is applied to the full-bridge IBB converter to achieve IBB conversion. Moreover, soft-switching performance of all active switches and diodes can be achieved over a wide load and voltage range by the proposed converter and control strategy. A 380-V-output prototype is fabricated to verify the effectiveness of the proposed family of IBB converters, the SARs, and the control strategies.