Enhanced-Boost Z-Source Inverters With Alternate-Cascaded Switched- and Tapped-Inductor Cells

“…Although this topology has several advantages, there are some disadvantages too. In previous studies, [16][17][18][19][20][21][22][23][24][25][26][27] several topologies based on transformer and tapped inductors have been presented. Moreover, input current is not continuous and has high ripple.…”

Section: Introductionmentioning

confidence: 99%

“…For example, this topology cannot generate zero voltage level in output. Some of the introduced topologies in previous studies [16][17][18][19][20][21][22][23][24][25][26][27] are developed topologies based on multiple and cascaded arrangements of basic topology. In Babaei and Shokati Asl, 10 modified topology for half-bridge Zsource inverter has been presented.…”

Section: Introductionmentioning

confidence: 99%

A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology

Sedaghati

Asl

2018

Circuit Theory & Apps

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In this paper, 2 types of half-bridge quasi-Z-source inverters with detailed analysis are proposed. Unlike the classical half-bridge inverter, both types of proposed half-bridge inverters can generate zero voltage level in output. Moreover, lack of continuous input current in conventional half-bridge inverters is resolved by the second type of proposed inverters. One of the important advantages of proposed inverters is using the 1 impedance network only with 2 capacitors and 2 inductors; whereas, most of the half-bridge Z-source inverters have more than 1 impedance network or use additional semiconductor elements. In this paper, operation principles of proposed inverters in different operating modes are discussed. Then, design considerations and calculation of critical Inductance in boundary conditions between 2 different states are provided. Next, power circuit of general topology with multiple DC sources and derivation of subcircuits are proposed. Finally, to verify validity of derived equations, simulation results using PSCAD/EMTDC software and experimental results are provided.KEYWORDS half-bridge inverter, quasi-Z-source inverter, shoot-through, Z-source inverter

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“…The impedance source networks are widely used in the inverters [13][14][15][16] to increase the voltage boost inversion ability. Likewise, the impedance source networks can also be used in high step-up DC-DC converters to achieve high voltage gain [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Non-isolated high step-up DC–DC converter adopting auxiliary capacitor and coupled inductor

Ruan

2017

J. Mod. Power Syst. Clean Energy

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For grid-connected power system based on photovoltaic (PV) source and fuel cells, high step-up and high-efficiency DC-DC converters are needed, due to the bus voltage of the grid-connected inverter is much higher than the output voltage of PV and fuel cells. In this paper, a novel high step-up converter is proposed. An auxiliary capacitor is introduced into the boost converter, which serves as a voltage source. It is in series with the input voltage source with the same voltage polarities. Thus, the input voltage is increased equivalently and the voltage gain is increased accordingly. To reduce the voltage stresses of the switch and the diode, multiple output capacitors are introduced. The voltage of each output capacitor is degraded leading to the reduced voltage stress. To replenish energy for the multiple output capacitors, a coupled inductor is adopted. Based on this, high step-up converter adopting auxiliary capacitor and coupled inductor is derived. The operating principles and voltage gain of the proposed converters are analyzed in this paper. In the end, experiment results are given to verify the theoretical analysis.

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Enhanced-Boost Z-Source Inverters With Alternate-Cascaded Switched- and Tapped-Inductor Cells

Cited by 65 publications

References 28 publications

Impedance networks and its Application in Power for Electric Traction Systems

Impedance networks and its Application in Power for Electric Traction Systems

A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology

Non-isolated high step-up DC–DC converter adopting auxiliary capacitor and coupled inductor

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