Dual-Buck Full-Bridge Inverter With Hysteresis Current Control
Dual-Buck Full-Bridge Inverter With Hysteresis Current Control
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DOI：
10.1109/tie.2009.2022072
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发表时间：
2009-05
影响因子：
7.7
通讯作者：
Zhilei Yao;Lan Xiao;Yangguang Yan
中科院分区：
文献类型：
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作者：
Zhilei Yao;Lan Xiao;Yangguang Yan
为了解决传统桥式逆变器的通射问题，降低双降压半桥逆变器电源器件的电压应力，提出了一种双降压全桥逆变器（DBFBI）。DBFBI采用磁滞电流控制。所有开关和二极管都在每半线周期工作，并且自由流动电流通过独立的自由流动二极管而不是开关的主体二极管，因此可以潜在地提高效率。由于DBFBI中不存在穿透问题，因此不需要设置开关之间的死区时间。在相同输出电压条件下，DBFBI的输入电压利用率是DBHBI的两倍，即DBFBI中功率器件的电压应力是DBHBI中的一半。给出了工作原理、稳定性和相对稳定性分析、设计指南和设计实例。1 kva DBFBI的实验结果验证了理论分析。与其他逆变器和DBFBI的比较表明，该逆变器在不间断电源和并网逆变器等220-240 vrms输出电压和高可靠性应用中非常有前景。
This paper presents a dual-buck full-bridge inverter (DBFBI) to solve the shoot-through problem in conventional bridge-type inverters and reduce the voltage stress of the power device in the dual-buck half-bridge inverter (DBHBI). Hysteresis current control is used in the DBFBI. All switches and diodes operate at each half line cycle, and the freewheeling current flows through the independent freewheeling diodes instead of the body diodes of the switches, so the efficiency can be increased potentially. As the shoot-through problem does not exist in the DBFBI, dead time between the switches need not be set. The input-voltage utilization rate of the DBFBI is twice that of the DBHBI under the same output-voltage condition, i.e., the voltage stress of the power device in DBFBI is half that in the DBHBI. The operating principle, stability and relative stability analyses, and design guidelines and example are provided. Experimental results of a 1-kVA DBFBI verify the theoretical analysis. The comparisons among other inverters and the DBFBI show that the proposed inverter is very promising in 220-240-Vrms output-voltage and high-reliability applications, such as uninterruptible power supplies and grid-connected inverters.