Dual-Buck Three-Switch Leg Converters With Reduced Number of Passive Components
Dual-Buck Three-Switch Leg Converters With Reduced Number of Passive Components
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DOI：
10.1109/tpel.2022.3183834
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发表时间：
2022-11
影响因子：
6.7
通讯作者：
F. Akbar;U. Khan;Ashraf Ali Khan;H. Ahmed;Ahmad Elkhateb;Honnyong Cha;Jung-Wook Park
中科院分区：
文献类型：
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作者：
F. Akbar;U. Khan;Ashraf Ali Khan;H. Ahmed;Ahmad Elkhateb;Honnyong Cha;Jung-Wook Park
与传统的双开关桥臂变换器一样，三开关桥臂变换器也具有短路风险，并且如果同一桥臂的开关同时导通，则会产生危险的直通电流。本文提出了一种新的双降压结构，用于三开关桥臂变换器。所提出的结构是可靠的，因为没有直通的关注和高质量的输出波形可以得到由于减少脉宽调制死区时间。与传统的双降压三开关桥臂使用许多无源元件（如四个限流电感和三个外部二极管）不同，新的双降压三开关桥臂仅使用一个限流电感和两个外部二极管。为了验证性能，建议的三个开关桥臂用于单相双输出逆变器和详细的理论分析，仿真和实验进行。连续和不连续调制方案都适用，它已经计算出，不连续调制方案可以提高直流母线电压利用率在同频操作模式。
Like conventional two-switch leg converters, the three-switch leg converters also have short-circuit risks and a dangerous shoot-through current is generated if switches of the same leg are turned on simultaneously. In this article, a new dual-buck structure is proposed for three-switch leg converters. The proposed structure is reliable because of no shoot-through concerns and high quality of output waveforms can be obtained due to the reduction in pulsewidth modulation deadtime. Unlike the conventional dual-buck three-switch leg that uses many passive components such as four current limiting inductors and three external diodes, the new dual-buck three-switch leg uses only one current limiting inductor with two external diodes. To verify the performance, the proposed three-switch legs are used in single-phase dual-output inverter and detailed theoretical analysis, simulation, and experiments are performed. Both continuous and discontinuous modulation schemes are applied and it has been figured out that discontinuous modulation scheme can improve the dc-link voltage utilization in the common-frequency mode of operation.