A New Variant of Turns-Ratio Independent Shoot-Through Current-Based Magnetically-Coupled Z-Source Inverter With Smooth DC-Link Voltage and Enhanced High-Gain

IF 4 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2025-04-15 DOI:10.1109/TCSII.2025.3560895

S. Konar;P. K. Gayen;S. S. Saha

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Abstract

In a magnetically coupled impedance-source (MCIS) inverter, the low value of shoot-through (ST) current is desired to reduce the ratings and losses of the power converter. In this regard, turns-ratio-independent ST current is an important requirement. Very few inverters (active-switched Y-source MCIS inverters) are found in a recent article, which claims turns-ratio-independent ST current as a figure of merit. But it is observed that the voltage gain of the turn-ratio-independent ST current-based configuration is lesser than the turns-ratio-dependent ST current-based inverters. Therefore, this brief proposes a new variant of an active-switched MCIS inverter with a smooth DC-link voltage, which simultaneously exhibits enhanced voltage gain and a turns ratio-independent ST current. The voltage gain of the suggested network is higher than that of the recent equivalent MCIS inverters for the same magnitude and duration of shoot-through current, i.e., the voltage gains per shoot-through current (combined figure of merit) are significantly improved in the proposed inverter. The switching device power (SDP) is also reduced in the suggested inverter. Its desired operation is experimentally verified.

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一种基于圆滑直流链路电压和增强高增益的磁耦合z源逆变器的新型匝比无关击穿电流

在磁耦合阻抗源（MCIS）逆变器中，为了降低功率变换器的额定值和损耗，需要较低的通射电流值。在这方面，与匝数比无关的ST电流是一个重要的要求。在最近的一篇文章中发现很少的逆变器（有源开关y源MCIS逆变器），该文章声称与匝比无关的ST电流是一种优点。但是可以观察到，与匝比无关的基于ST电流的配置的电压增益小于基于匝比相关的基于ST电流的逆变器。因此，本文提出了一种具有光滑直流链路电压的有源开关MCIS逆变器的新变体，同时具有增强的电压增益和与匝数比无关的ST电流。在相同的通断电流幅度和持续时间下，所提出的网络的电压增益高于最近的等效MCIS逆变器，即，在所提出的逆变器中，每个通断电流的电压增益（综合优值）显着提高。在建议的逆变器中，开关器件功率（SDP）也降低了。实验验证了其理想的运行效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.