Three-Port Rectifier-Based AC–DC Power Converters With Sigma Architecture and Reduced Conversion Stages
Three-Port Rectifier-Based AC–DC Power Converters With Sigma Architecture and Reduced Conversion Stages
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DOI：
10.1109/jestpe.2017.2648859
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发表时间：
2017-01
影响因子：
5.5
通讯作者：
Hongfei Wu;Meng Han;Yanfeng Zhang
中科院分区：
文献类型：
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作者：
Hongfei Wu;Meng Han;Yanfeng Zhang
本文提出了一种新颖的具有Sigma结构和三端口整流器(TPR)的AC-DC功率转换器。TPR由交流输入端口、低压直流输出端口和高压直流输出端口组成。将电压低于交流端口峰值线电压的低压直流端口连接到直流负载，使得输入功率可以在单级功率变换中通过TPR直接馈送到直流负载。TPR负责线路电流调节和直流负载电压控制，另一个DC-DC转换器用于调节TPR的高压直流端口。由于TPR的单级功率变换和三个电压电平特性，本文提出的Sigma AC-DC转换器具有减少变换级数和降低开关损耗的优点。此外，由于DC-DC转换器只需要处理部分功率，因此大大降低了下游DC-DC转换器的额定功率。详细分析了所提出的AC-DC转换器的工作原理和特点。搭建了一台2kW的样机并进行了测试，验证了该方法的有效性和优越性。
Novel ac–dc power converters with sigma architecture and three-port rectifier (TPR) are proposed in this paper. The TPR is composed of an ac input port, a low-voltage dc output port, and a high-voltage dc output port. The low voltage dc port, whose voltage is lower than the peak line voltage of the ac port, is connected to the dc load so that the input power can be directly fed to the dc load through the TPR within single-stage power conversion. The TPR is responsible for line current regulation and dc load voltage control, while another dc–dc converter is used to regulate the high-voltage dc port of the TPR. The proposed sigma ac–dc converter has the merits of reduced conversion stages and lower switching losses because of the single-stage power conversion and three voltage-level characteristics of the TPR. Furthermore, the power rating of the down-stream dc–dc converter is reduced significantly because only partial power needs to be processed by the dc–dc converter. The operation principles and characteristics of the proposed ac–dc converter are analyzed in detail. A 2-kW prototype is built and tested to verify the effectiveness and advantage of the proposed method.