A Single-Source Nine-Level Boost Inverter With a Low Switch Count

Manxin Chen; Yongheng Yang; Poh Chiang LohFrede Blaabjerg

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A Single-Source Nine-Level Boost Inverter With a Low Switch Count

机译：A Single-Source Nine-Level Boost Inverter With a Low Switch Count

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摘要

Switched-capacitor-based multilevel inverters for boost-type dc#x2013;ac power conversions usually exhibit a trade-off between the switch count and switch-voltage rating, i.e., a reduction of one necessitating an increase of the other. Such a dilemma is well addressed in this article by proposing a novel single-phase nine-level inverter based on a switched-capacitor network with a single switch. The proposed inverter then reduces the number of switches while generating a boosted dc-link voltage. A unique six-switch full-bridge cooperating with a low-frequency half-bridge further steps-up the output voltage with a quadruple gain. The voltage stresses on the power devices are, however, maintained low even under the boosted high output voltage, as all the switches#x002F;diodes can be clamped to any of the low-voltage capacitors. Consequently, low-voltage power devices can be utilized, reducing the overall power loss. Detailed theoretical analysis, calculations, and design considerations of the proposed inverter are provided. Comparisons with the prior-art inverters illustrate its advantages. Simulations and experimental tests on a 1-kVA inverter prototype verify the above-claimed benefits.

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来源
《IEEE Transactions on Industrial Electronics》 |2022年第3期|2644-2658|共15页
作者
Manxin Chen; Yongheng Yang; Poh Chiang LohFrede Blaabjerg;
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作者单位

The Chinese University of Hong Kong;

Zhejiang University;

Aalborg University;

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原文格式 PDF
正文语种英语
中图分类无线电电子学、电信技术;
关键词
Boost multilevel inverter (MLI); low switch count; low-voltage stresses; switched capacitor (SC); Switches; Inverters; Capacitors; Low voltage; Switching circuits; Stress; Boosting;

A Single-Source Nine-Level Boost Inverter With a Low Switch Count

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