This paper deals with a new family of high boost voltage inverters called switched-inductor quasi-Z-source (SL-qZSIs). The proposed SL-qZSI is based on the well-known qZSI topology and adds only one inductor three diodes. In comparison to SL-ZSI, for same input output voltages, provides continuous current, common ground dc source, reduced passive component count, stress capacitors, lower shoot-through current inductors addition, can suppress inrush at startup, which might destroy devices....

A switched boost inverter (SBI) can replace a Z-source (ZSI) in low-power applications because it has one less LC pair than the ZSI. This paper presents class of quasi-SBIs (qSBIs) that offers several advantages when compared with conventional SBI, including reducing voltage stress on capacitor, increasing factor, and improving input current profiles. Operating principles, steady-state analysis, comparisons inverters are presented. prototype based TMS320F28335 digital signal processor is...

A switched-capacitor-based dual-switch dc-dc converter with a high-boost voltage gain is proposed in this paper. The can obtain high-voltage small duty cycle, which decreases the stress and conduction loss on power switches. This paper presents key waveforms, operating principles at continuous mode discontinuous mode, parameter design. Moreover, comparison between other nonisolated converters has been completed. To verify principle, 200 W prototype constructed an input of 25-50 V output V....

A new family of single-stage high-step-up boost voltage inverters based on transformers is proposed, called TZ-source inverters. By replacing two inductors in the classical Z-source inverter with transformers, proposed produces a very high gain when turn ratio larger than 1. Compared to trans-Z-source inverters, uses lower transformer ratio, which reduces transformer's size and weight while producing same output gain. The extension topology dc-link-type embedded-type topologies presented....

This paper deals with a new family of high boost voltage inverters that improve upon the conventional trans-Z-source and trans-quasi-Z-source inverters. The improved inverter provides continuous input current higher inversion capability. In addition, can suppress resonant at startup, which might destroy device. comparison to trans-Z-source/-trans-quasi-Z-source inverters, for same transformer turn ratio output voltages, has modulation index reduced stress on dc link, lower flow windings...

This paper deals with a new family of single-phase ac-ac converters called quasi-Z-source converters. The proposed converter inherits all the advantages traditional Z-source converter, which can realize buck-boost, reversing, or maintaining phase angle. In addition, has unique features that input voltage and output share same ground operation is in continuous current mode. operating principles are described, circuit analysis provided. order to verify performance laboratory prototype was...

In this study, two topologies are presented for switched-inductor quasi-Z-source inverters, namely a ripple input current inverter (rSL-qZSI) and continuous (cSL-qZSI). The proposed inverters possess high boost voltage inversion ability lower stress across the active switching devices. Compared with conventional ZSI, SL-qZSIs same output provide reduced on capacitors. Moreover, can overcome startup inrush problem but SL-qZSI cannot this. This study presents operating principles analysis,...

The properties of a single-phase quasi Z-source inverter (qZSI) and quasi-switched boost (qSBI), both which are single-stage buck-boost inverters, investigated compared. For the same operating conditions, qSBI has following advantages over qZSI: 1) Three capacitors saved; 2) current rating on its switches diodes is lower; 3) factor higher with an equivalent parasitic effect; 4) efficiency higher. However, one more active switch diode than Z-source/ qZSIs. In addition, capacitor voltage...

A modified single-phase quasi-Z-source ac-ac converter is proposed in this paper. The has the main features that output voltage can be bucked or boosted and both in-phase out-of-phase with input voltage. share same ground, size of a reduced, it operates continuous current mode. safe-commutation strategy for used instead snubber circuit. operating principles steady-state analysis are presented. laboratory prototype, tested using resistive load, passive nonlinear was constructed an 70 V <sub...

This paper proposes a new type of converter called single-phase Z-source buck-boost matrix converter. The can buck and boost with step-changed frequency, both the frequency voltage be stepped up or down. In addition, employs safe-commutation strategy to conduct along continuous current path, which results in elimination spikes on switches without need for snubber circuit. operating principles proposed are described, circuit analysis is provided. To verify performance converter, laboratory...

This study deals with a class of the switched-inductor boost inverters (SLBIs) including DC-linked type, continuous, discontinuous and ripple input current topologies. Compared conventional switched inverters, SLBIs add only three diodes one inductor to obtain strong factor. In comparison Z-source (ZSIs) for same voltage gain at modulation indexes, proposed use more active switch less passive components which results in reducing size cost. Moreover, efficiency is improved ZSIs. Analysis...

This paper documents a new three-switch, isolated boost dc-dc converter. The major features of the proposed converter are as follows: 1) continuous input current; 2) reduced one active switch, additional diode, and capacitor; 3) unchanged primary secondary voltage waveforms transformer when duty cycle is changed; 4) removal snubber circuit. presents operating principles, analysis, parameter design guidelines, simulation results for To verify performance converter, 400 W prototype was...

Latterly, multilevel inverters have become more attractive for researchers due to low total harmonic distortion in the output voltage and electromagnetic interference. This paper proposes a novel single-stage quasi-cascaded H-bridge five-level boost inverter (qCHB-FLBI). The proposed has advantages over CHB quasi-Z-source cutting down passive components. Consequently, size, cost, weight of are reduced. Additionally, qCHB-FLBI can work shoot-though state. A capacitor with rating is added...

In this paper, a three-level quasi-switched boost T-type inverter (3L qSBT <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> I) is proposed. A new pulse-width modulated (PWM) control method presented to reduce the inductor current ripple of I. introduced PWM technique, shoot-through duty cycle maintained constant keep modulation index as high possible. Then, only parameters I are cycles two additional switches. By controlling switches,...

In this paper, two switched-capacitor quasi-switched boost inverters (qSBIs) are proposed. By adding one capacitor and diode to the qSBIs, proposed achieve high voltage gain with low stress on active switches, capacitors, diodes. The can extend n-cell for improvement. operating principle, steady-state analysis, impedance parameter selections of inverter presented. A full comparison between other impedance-source is addressed. 500-W prototype built verify theory in both standalone mode...

Two high voltage gain quasi-switched boost inverters (HG-qSBIs) are introduced in this paper. The proposed HG-qSBIs has the following characteristics: 1) continuous input current with low ripple; 2) reduced stress on capacitor, switch, and diodes; 3) shoot-through immunity; 4) achieved single-stage conversion; 5) improve output capability using modulation index. A novel pulse-width modulationcontrol technique is for HG-qSBI. Operating principle, circuit analysis, passive component design...

In this paper, a new isolated high step-up dc-dc converter is proposed based on the quasi-switched-boost network. The has following features: 1) continuous input current; 2) reduced turn ratio of transformer; 3) increased reliability, as it can operate in either short-circuit mode or open-circuit without causing damage to power converter; and 4) unchanged primary secondary voltage waveforms transformer, although shoot-through duty cycle variable. Compared quasi-Z-source-based converter, uses...

This study proposes a new topology for multilevel inverters based on switched‐capacitor structure. The proposed uses capacitor charged/discharged characteristic to boost the output voltage without employing magnetic elements. circuit configuration has fewer components, including switches, sources, and capacitors comparing with conventional similar topologies. A phase disposition pulse‐width modulation method is used enhance waveform quality of inverter. Nine‐level 17‐level configurations are...

This paper proposes a new single-phase single-stage switched-boost inverter with four switches. Like the quasi-Z-source and quasi-switched boost (qSBI), proposed has main features as continuous input current, buck/boost voltage conversion, shoot-through immunity. Compared to qSBI, uses one more capacitor less switch. presents operating principles, pulse-width modulation control strategy, parameter design guidelines, simulation results for inverter. To verify performance of inverter, an 800-W...

High-frequency common mode voltage elimination is one of the most important issues for transformerless PV grid-connected inverters. Many interesting single-phase inverter topologies have been reported to reduce voltage. However, them are voltage-source inverters, which suffer from a limited lifetime and reliability. In order solve problem, new six-switch current source proposed. A one-dimensional space vector modulation strategy also presented so as eliminate high-frequency The proposed...

DC-DC CONVERTERS ARE SOLID-STATE DC "transformers" that convert one type of dc electricity into another via power electronic circuits. They have been used in a broad range applications, from IT devices (such as supply to provide different voltage levels inside personal computer or data center server) medical equipment (e.g., solar charger for cardiac pacemaker) and consumer electronics chargers various smart mobile devices) high-power industrial which is the focused area this article. As...

This paper proposed a novel family of pulsewidth modulation (PWM) strategies for single-phase quasi-switched boost inverter (qSBI). By combining shoot-through (ST) mode in the inverter's switches and turning-on state an additional switch, qSBI produced high voltage gain without adding any passive components. Compared to conventional PWM strategy same input output gain, introduced could reduce stress across semiconductors capacitor with following merits: having smaller high-frequency inductor...

The simple boost control (SBC) method is usually used to the shoot-through state in a single-phase single-stage quasi-switched inverter (qSBI). This paper proposes new pulse-width modulation (PWM) scheme improve index for qSBI. advantages of proposed qSBI over conventional SBC are as follows: 1) larger; 2) voltage stress on capacitor, diodes, and switches reduced significantly; 3) high-frequency peak-to-peak inductor current capacitor ripples smaller; 4) lower; 5) efficiency higher....

Conventional switched boost inverters (SBIs) employ a single LC-pair in the impedance network to input voltage by setting shoot-through interval inverter bridge switches. This study extends concept of SBIs transformer-based (trans-SBIs). By changing turn ratio transformer, proposed trans-SBIs can produce strong gain. Compared with tapped-inductor Z-source same gain at transformer ratio, have only one extra active switch but significantly fewer passive components. trans-ZSI, use lower achieve...