双Buck半桥逆变器输入电容电压脉动的分析

doi:10.7527/S1000-6893.2016.0199

Abstract

Abstract:

Dual-buck inverter (DBI) is one of the widely adopted topologies in aeronautical static inverters (ASIs). With discrete AC filter inductor, the volume and weight of dual buck-half bridge inverters (DBHBIs) are further reduced. However, there will be voltage ripple on input capacitors when a dual-buck half bridge inverter is normally operated, especially when the load is shorted, and the ripple is at the same frequency as the output voltage. In this paper, a DBHBI with discrete AC filter inductor is taken as an example, which operates on the conditions of nominal load, short circuit and cascade. The cause for voltage ripple on input capacitors is analyzed, and the mathematical calculation method and the guidelines for capacitor design is proposed. The analysis is verified by the results of simulations and experiments. The method in this paper can be also applied to other half bridge inverters.

Key words: dual-buck inverter, aeronautical static inverter, half bridge, capacitor voltage ripple, short circuit, two-stage

CLC Number:

V242.2
TM464

MENG Wuji, ZHANG Fanghua, XIE Jianghua, WANG Jinlong. Analysis of voltage ripple on input capacitors in dual-buck half bridge inverters[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(1): 320054-320054.

References

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Analysis of voltage ripple on input capacitors in dual-buck half bridge inverters

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