Transactions of China Electrotechnical Society  2016, Vol. 31 Issue (13): 1-9    DOI:
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A High Power Density Dual-Buck Full-Bridge Inverter Based on Carrier Phase-Shifted Control
Xie Jianghua,Zhang Fanghua,Zhang Shuai,Chen Fei,Lei Ming
Jiangsu Key Laboratory of New Energy Generation and Power Conversion Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

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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 wordsDual 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
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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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