Differential mode gamma source inverter with reduced switching stresses

Reddiprasad Reddivari, D. Jena
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引用次数: 4

Abstract

Impedance source inverters are covered with entire spectrum of power conversion process (dc-dc, dc-ac, ac-dc, and ac-ac). The traditional impedance source inverter suffers from high switching stresses and poor efficiency during high boost requirements. Compared to traditional impedance source inverters, the transformer based impedance source inverters are able to boost the output voltage gain and modulation index simultaneously with reduced passive components. The applications of transformer based gamma source impedance inverters are limited due to the difficulty in maintaining tight coupling, high instantaneous currents, increasing turn's ratio, high cost and large size. However, the gamma source inverter increases voltage gain by reducing turns ratio. This paper presents the operational modes of gamma source inverter in electric and magnetic domains, which helps the researchers to understand effects of transformer coupling in converter performance. In addition, the differential mode gamma source inverter is proposed that reduces the switching stresses. The operating principles of the proposed converter have been analyzed mathematically. Finally the theoretical analysis of proposed impedance inverter is validated by using MATLAB/SIMULINK.
具有降低开关应力的差分模式伽马源逆变器
阻抗源逆变器涵盖了整个功率转换过程(dc-dc, dc-ac, ac-dc和ac-ac)。传统的阻抗源逆变器在高升压条件下存在开关应力大、效率差的问题。与传统的阻抗源逆变器相比,基于变压器的阻抗源逆变器能够在减少无源元件的情况下同时提高输出电压增益和调制指数。基于变压器的伽马源阻抗逆变器由于难以保持紧密耦合、瞬时电流大、匝数比增大、成本高和体积大等问题,限制了逆变器的应用。然而,伽马源逆变器通过降低匝数比来增加电压增益。本文介绍了伽马源逆变器在电域和磁域的工作模式,有助于研究人员了解变压器耦合对变换器性能的影响。此外,还提出了一种减小开关应力的差模伽马源逆变器。对该变换器的工作原理进行了数学分析。最后利用MATLAB/SIMULINK对所提出的阻抗逆变器进行了理论分析验证。
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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