Operational Analysis of Improved Γ-Z-Source Inverter With Clamping Diode and Its Comparative Evaluation

Zhou

IEEE Trans. Power Electron.

et al. 2019

Impedance-source inverters using coupled inductors have been investigated as alternatives for providing high step-up voltages. However, leakage inductances of the coupled inductors have commonly led to lower overall effectiveness, in addition to generating high dc-link voltage spikes. The latter raises voltage stresses of switches, which in turn, may reduce the power levels of the inverters. A high step-up Y-source inverter (HS-YSI) has therefore been proposed in this paper to provide a high boost with a smooth dc-link voltage ensured by proper recycling of the leakage energy. These features have been verified by comparing simulation and experimental results of an existing Y-source and the proposed inverters. Factors compared are their respective boost ratios, voltage stresses, current stresses and dc-link voltage spikes.

Section: Introductionmentioning

confidence: 93%

“…2. Illustration of passive absorbing (a) Circuit 1 [20], (b) Circuit 2 [21], (c) Circuit 3 [22], and (d) Circuit 4 [23].…”

Section: Leakage Effects From Coupled Inductormentioning

confidence: 99%

See 1 more Smart Citation

High Step-Up Y-Source Inverter With Reduced DC-Link Voltage Spikes

Zhou

IEEE Trans. Power Electron.

et al. 2019

Int Trans Electr Energ Syst

“…Z‐source structure has received a lot of attention because of its numerous benefits including single‐stage power conversion and improved reliability. Thus, researchers have used Z‐Source Inverters (ZSIs) in many different applications . It employs five bidirectional switches, an impedance network consisting of two inductors and capacitors, LC filter, and load.…”

Section: Categories Of Mcsmentioning

confidence: 99%

“…Thus, researchers have used Z-Source Inverters (ZSIs) in many different applications. [39][40][41][42] It employs five bidirectional switches, an impedance network consisting of two inductors and capacitors, LC filter, and load. The storage elements in the impedance network provides the boosting feature.…”

Section: Single-phase Z-source MCmentioning

confidence: 99%

Matrix converters for electric power conversion: Review of topologies and basic control techniques

Alammari

Aleem

Iqbal

et al. 2019

Self Cite

Summary A matrix converter (MC) is a topology for ac‐ac power conversion that has been widely investigated and compared with conventional ac‐dc‐ac topologies because of its attractive features. The MC is formed of controlled active devices and does not include any sizeable passive components. The converter can be used to directly control single/three/multiphase loads. MCs are highly effective in controlling the power factor and providing sinusoidal input and output currents. This paper provides a comprehensive state of the art review of the MC and discusses the main topology variations including single‐phase conventional and isolated MCs, three‐phase direct and indirect MCs, impedance source (Z‐source) MCs, multiphase MCs, and multilevel MCs (MMCs). The aim of this research article is to provide a one‐stop information on single/three/multiphase matrix, Z‐source matrix, and multilevel MCs for potential readers, researchers, and practicing engineers.

A cost‐effective single‐phase semi flipped gamma type magnetically coupled impedance source inverters

Gautham

Reddivari

Jena

2020

Circuit Theory & Apps

Summary This paper presents a new two winding coupled inductor architecture for a semi magnetically coupled impedance source (SMCIS) inverter by connecting the coupled inductor windings in flipped gamma fashion. The proposed topology is derived from the conventional MCIS inverters. It can produce sinusoidal output voltage/current without using any shoot‐through operation and output LC filter, which improves the system reliability. Further, a doubly grounded feature, no start‐up inrush current, reduced component count, low input current ripple, continuous output currents, and small leakage currents are the major advantages of the proposed inverter. However, the proposed semi flipped gamma MCIS inverters still suffer from limited output voltage gain problem. The voltage‐boosting feature is added to the proposed inverter by connecting two converter modules in differential boost configuration through the embedded structure. The voltage‐boosting ability is the major advantage of this differential boost embedded configuration. It has flexibility in choosing a wide range of duty cycle operation from zero to one (whereas, the duty cycle was limited to 0.666 in case of semi‐Z‐source inverter [ZSI]). The modes of operation, design procedure, and feature comparisons of proposed inverters are discussed in this paper. Finally, the effectiveness of proposed inverters is validated through simulation and experimental results in terms of component count, voltage gain, and feature comparison.