Minimum flying capacitor for N-level capacitor DC/DC boost converter
Minimum flying capacitor for N-level capacitor DC/DC boost converter
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N级电容DC/DC升压转换器的最小飞跨电容
DOI：
10.1109/tia.2016.2555789
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Itoh
中科院分区：
文献类型：
--
作者：
A. Ponniran;K. Orikawa;J. Itoh
本文提出了一种小容量飞电容DC/DC升压变换器（FCBC）。因此，所提出的转换器的尺寸和重量可以减少。飞行电容的电容设计基于开关器件额定电压，而不考虑输出电压纹波的影响。此外，在输出功率为1kw时，所设计的3级FCBC的最大效率为98.5%。最后，研究了小电容飞行电容器在3级和5级FCBCs中的有效性。利用三电平和五电平FCBCs的几种飞行电容，研究了输入电压源和输入电感两端的畸变电压特性以及输出端输出电容和负载端的畸变电流特性。实验结果表明，通过增加电平数，大大减小了输入电压源和输入电感之间的电压畸变。另一方面，即使电平数增加，电流对输出端（即输出电容和负载）的失真也几乎相同。因此，实验结果表明，小电容的飞行电容器可以用于n级FCBC。
This paper proposes a Flying Capacitor DC/DC Boost Converter (FCBC) with a small capacitance of the flying capacitor. As a result the size and weight of the proposed converter can be reduced. The capacitance of the flying capacitor is designed based on switching device voltage rating and regardless of the output voltage ripple influences. Moreover, the achieved maximum efficiency of the designed 3-level FCBC is 98.5% at the output power of 1 kW. Finally, the effectiveness of small capacitances of the flying capacitor in the 3-level and 5-level FCBCs are investigated. The characteristics of the distorted voltage across an input voltage source and an input inductor and the distorted current to the output side which is an output capacitor and a load are investigated with several capacitances of the flying capacitors for 3-level and 5-level FCBCs. As a result, it is experimentally confirmed that the distortion of the voltage across the input voltage source and the input inductor is drastically reduced by increasing the number of level. On the other hand, the distortion of the current to the output side which is the output capacitor and the load is almost same even the number of level is increased. Therefore, the experimental results show that small capacitance of the flying capacitor can be used in the n-level FCBC.