Comparison of Ripple and Stress of a Non-isolated Basic Quasi-Z-Source Converter with a Diode or Inductor as Output Filter

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Se-Jin Kim, Young-Gook Jung
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Abstract

In this study, the electrical characteristics of a non-isolated basic quasi-Z-source converter (qZSC) with an inductor output filter and a non-isolated basic qZSC with a diode output filter are compared. The electrical characteristics of the non-isolated qZSC are the input current and voltage ripple of the qZ-network, the current stress of the output filter, and the efficiency of the converter. The circuit equation of each converter was obtained, and the voltage gain, maximum current, minimum current, and required element ratings were calculated. Under the conditions of input voltage 80 V and output voltage 120 V, the shoot-through duty ratio for the same voltage boost gain was much lower for the diode filter qZSC, and the input current, qZ-network capacitor voltage, and the required minimum element ratings were also more advantageous than the inductor filter qZSC. However, in terms of the output filter, the inductor filter qZSC has a current stress advantage over the diode filter qZSC. A DSP-based experiment was performed to verify the validity of this study. The capacitor voltage and inductor current of the qZ-network and the voltage of each converter and the current of the output filter were compared under the condition of an input voltage of 80 V and an output voltage of 120 V. Finally, as a result of comparing the efficiency of voltage gain change or input voltage change for the same load and the efficiency according to load change at a constant duty ratio, it was found that the diode filter qZSC is advantageous by about 1%.

Abstract Image

使用二极管或电感器作为输出滤波器的非隔离式基本准 Z 源转换器的纹波和应力比较
本研究比较了带电感输出滤波器的非隔离基本准 Z 源转换器(qZSC)和带二极管输出滤波器的非隔离基本 qZSC 的电气特性。非隔离式 qZSC 的电气特性包括 qZ 网络的输入电流和电压纹波、输出滤波器的电流应力以及转换器的效率。我们得到了每个转换器的电路方程,并计算了电压增益、最大电流、最小电流和所需元件的额定值。在输入电压 80 V 和输出电压 120 V 的条件下,二极管滤波器 qZSC 在相同电压升压增益下的击穿占空比要低得多,输入电流、qZ 网络电容器电压和所需的最小元件额定值也比电感滤波器 qZSC 更具优势。不过,在输出滤波器方面,电感滤波器 qZSC 比二极管滤波器 qZSC 具有电流应力优势。为了验证这项研究的有效性,我们进行了基于 DSP 的实验。在输入电压为 80 V 和输出电压为 120 V 的条件下,比较了 qZ 网络的电容器电压和电感器电流,以及每个转换器的电压和输出滤波器的电流。最后,通过比较相同负载下电压增益变化或输入电压变化的效率,以及在占空比不变的情况下负载变化的效率,发现二极管滤波器 qZSC 的优势约为 1%。
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来源期刊
Journal of Electrical Engineering & Technology
Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-
CiteScore
4.00
自引率
15.80%
发文量
321
审稿时长
3.8 months
期刊介绍: ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.
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