基于载波移相控制的高功率密度双降压式全桥逆变器

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Abstract The dual buck full-bridge inverter (DBFBI) has great advantages in reliability and efficiency because of no shoot-through concerns, high utilization rate of DC input voltage, and optimal choice of its free-wheeling diodes.However, the four filter inductors make the inverter large and heavy, which limits its applications in high power density conditions.The carrier phase-shifted sinusoidal pulse width modulation (CPS-SPWM) control is applied to DBFBIs in this paper.With the CPS-SPWM control, the equivalent operating frequency of the output filter inductors is twice of the switching frequency, which effectively reduces the size and weight of the filter inductor.In addition, only two switches work in the high-frequency switching state during the half line cycle of the filter-inductor current, which can effectively reduce the inverter switching losses.The circulating current introduced by this control is analyzed in detail.By separating a common filter inductor (CFI) from the four primary inductors, the circulating current losses can be effectively reduced.The design guidelines of the filter inductors are provided.Finally, the remaining four filter inductors are realized by two coupled inductors in order to further utilize the magnetic core.Experimental results verify the theoretical analysis.

Key words： Dual buck full-bridge inverter carrier phase-shifted SPWM circulating current filter inductor coupled-inductor

Received: 18 July 2014 Published: 15 July 2016

PACS:

TM464

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	Xie Jianghua
	Zhang Fanghua
	Zhang Shuai
	Chen Fei
	Lei Ming

Cite this article:

Xie Jianghua,Zhang Fanghua,Zhang Shuai等. A High Power Density Dual-Buck Full-Bridge Inverter Based on Carrier Phase-Shifted Control[J]. Transactions of China Electrotechnical Society, 2016, 31(13): 1-9.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I13/1

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