Journal ArticleDOI
Quasi-Z-Source Inverter With a T-Type Converter in Normal and Failure Mode
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TLDR
In this article, a three-phase multilevel quasi-Z-source inverter (qZSI) topology operating in normal and fault-tolerant operation mode is presented.Abstract:
This paper presents a three-phase multilevel quasi-Z-source inverter (qZSI) topology operating in normal and fault-tolerant operation mode. This structure is composed by two symmetrical quasi-Z-source networks and a three-phase T-type inverter. Besides the intrinsic advantages of multilevel voltage source inverters, the proposed structure is also characterized by their semiconductor fault tolerance capability. This feature is only obtained through changes on the modulation scheme after the semiconductor fault and does not require additional extra-phase legs or collective switching states. In certain fault types, the reduction of the output power capacity will be compensated by the boost characteristic of the qZSI. The fault-tolerant behavior of the proposed topology is demonstrated by several simulation results of the converter in normal and fault condition. To validate the characteristics of this multilevel qZSI, an experimental prototype was also built to experimentally confirm the results.read more
Citations
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Journal ArticleDOI
Voltage Source Multilevel Inverters With Reduced Device Count: Topological Review and Novel Comparative Factors
TL;DR: This article updates and summarizes the recently developed multilevel topologies with a reduced component count, based on their advantages, disadvantages, construction, and specific applications, and proposes a comparative method with novel factors to take component ratings into account.
Journal ArticleDOI
A Space Vector Modulation Scheme of the Quasi-Z-Source Three-Level T-Type Inverter for Common-Mode Voltage Reduction
TL;DR: A space vector modulation (SVM) scheme for the quasi-Z-source 3LT to reduce the magnitude and slew rate of common-mode voltage (CMV) and high dc-link voltage utilization can be maintained.
Journal ArticleDOI
Simultaneous Common-Mode Voltage Reduction and Neutral-Point Voltage Balance Scheme for the Quasi-Z-Source Three-Level T-Type Inverter
TL;DR: A novel modulation scheme for the quasi-Z-source three-level T-type inverter to realize voltage boosting, reduce the common-mode voltage (CMV), and control the neutral-point voltage balance simultaneously.
Journal ArticleDOI
Three-Level Quasi-Switched Boost T-Type Inverter: Analysis, PWM Control, and Verification
Duc-Tri Do,Minh-Khai Nguyen +1 more
TL;DR: By controlling the duty cycles of the two additional switches, the voltage gain of the proposed qSBT2 I can be improved to a value larger than that of the conventional 3L impedance source inverters.
Journal ArticleDOI
A Three-Level LC -Switching-Based Voltage Boost NPC Inverter
TL;DR: A continuous current input three-level LC-switching-based voltage boost neutral-point-clamped inverter is proposed, which uses comparatively less number of high-power passive components at the same time retains all the advantages of multilevel QZSI/ZSI.
References
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Journal ArticleDOI
Z-source inverter
TL;DR: The Z-source converter employs a unique impedance network to couple the converter main circuit to the power source, thus providing unique features that cannot be obtained in the traditional voltage-source (or voltage-fed) and current-source converters where a capacitor and inductor are used, respectively.
Proceedings ArticleDOI
Four quasi-Z-Source inverters
J. Anderson,Fang Zheng Peng +1 more
TL;DR: In this paper, theoretical results are shown for several novel inverters, which are similar to the Z-source inverters presented in previous works, but have several advantages, including in some combination; lower component ratings, reduced source stress, reduced component count and simplified control strategies.
Journal ArticleDOI
Fault tolerant three-phase AC motor drive topologies; a comparison of features, cost, and limitations
TL;DR: In this paper, the authors compared the output voltage and current space in terms of dq components for each topology and fault, and used a silicon overrating cost factor to compare the relative switching device costs of the topologies compared to a standard three-phase inverter.
Journal ArticleDOI
Constant boost control of the Z-source inverter to minimize current ripple and voltage stress
TL;DR: In this article, the authors proposed two constant boost control methods for the Z-source inverter, which can obtain maximum voltage gain at any given modulation index without producing any low-frequency ripple that is related to the output frequency and minimize the voltage stress at the same time.
Journal ArticleDOI
Survey on Reliability of Power Electronic Systems
Yantao Song,Bingsen Wang +1 more
TL;DR: A comprehensive review of reliability assessment and improvement of power electronic systems from three levels: 1) metrics and methodologies of reliability assess of existing system; 2) reliability improvement of existing systems by means of algorithmic solutions without change of the hardware; and 3) reliability-oriented design solutions that are based on fault-tolerant operation of the overall systems.