New step-up DC/DC converter with high-frequency isolation

Vinnikov, Dmitri; Roasto, Indrek; Jalakas, Tanel

doi:10.1109/iecon.2009.5415000

Cited by 14 publications

(21 citation statements)

References 10 publications

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“…The main purpose of capacitors (C1 and C2) in the qZSnetwork is to absorb the current ripple and limit the voltage ripple across the inverter bridge [17]. Caused by transient processes, the high voltage overshoots could occur on the qZS-network capacitors (Fig.…”

Section: Selection Of Capacitorsmentioning

confidence: 99%

“…The difference between the proposed converter and the conventional voltage stepping-up converter is in the use of the unique connection of coupled inductor (L1 and L2), two capacitors (C1 and C2) and the diode (D1), called quasi-Z-source (qZS) network [2], [3]. The qZS-network allows utilizing an extra switching state of converter called -shoot-through state.…”

Section: Introductionmentioning

confidence: 99%

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Practical Design Guidelines of qZSI Based Step-Up DC/DC Converter

Zaķis

Vinnikov

Roasto

et al. 2010

Scientific Journal of Riga Technical University. Power and Electrical Engineering

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Abstract. This paper presents some design guidelines for a new voltage fed step-up DC/DC isolated converter. The most significant advantage of proposed converter is voltage buck-boost operation on single stage. The most promising application for proposed converter is in the field of distributed power generation e.g. fuel cells or photovoltaic.The most sensitive issues -such as power losses caused by high currents in the input side of converter and high transient overvoltages across the inverter bridge caused by stray inductances were discussed and solved. The proposals and recommendations to overcome these issues are given in the paper. The Selection and design guidelines of converter elements are proposed and explained.The prototype of proposed converter was built and experimentally tested. Some results are presented and evaluated.

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Section: Selection Of Capacitorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Practical Design Guidelines of qZSI Based Step-Up DC/DC Converter

Zaķis

Vinnikov

Roasto

et al. 2010

Scientific Journal of Riga Technical University. Power and Electrical Engineering

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“…The impedance-source (IS) galvanically isolated DC-DC converter was proposed in [1] as an alternative power conversion approach for the renewable energy applications, in particular, for PV power systems. In general, the new topology was derived from a classical voltage source full-bridge isolated DC-DC converter by adding a passive IS network (ISN) to its input terminals.…”

Section: Introductionmentioning

confidence: 99%

“…According to the topology of the ISN, the existing IS DC-DC converters could be categorized as Z-Source [1,2], quasi-Z-Source [3], Trans-Z-Source [4], Trans-quasi-Zsource [4], and Y-source based converters [5]. The quasi-Z-Source (qZS) approach has gained its popularity fast in the renewable energy applications since it features the continuous input current during the shoot-through operation mode and reduced component stresses.…”

Section: Introductionmentioning

confidence: 99%

Quasi-Z-source half-bridge DC-DC converter for photovoltaic applications

Vinnikov

Chub

Huse

et al. 2015

2015 IEEE International Conference on Industrial Technology (ICIT)

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This paper presents a novel quasi-Z-source halfbridge galvanically isolated DC-DC converter intended for the photovoltaic applications. The topology could be envisioned as an alternative to the boost half-bridge DC-DC converter but the benefit of its symmetric structure reduces the threat of transformer saturation due to the dc flux. The proposed converter features the continuous input current and could be used either with one or two input voltage sources.

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“…1) is an inability to operate in the step-down (buck) mode because the VDR tends to keep the output voltage on the level of the twofold transformer voltage amplitude. Buck mode could be possible if a full-bridge rectifier and LC-filter are combined on the secondary side of the converter [8], [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of buck mode realization possibilities in quasi-Z-source DC-DC converters with voltage doubler rectifier

Zaķis

Raņķis

Liivik

et al. 2015

2015 IEEE 5th International Conference on Power Engineering, Energy and Electrical Drives (POWERENG)

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A series resonant tank in the quasi-Z-source (qZS) DC-DC converter with a voltage doubler rectifier could significantly increase the input voltage regulation range by adding the buck mode realization possibility. This paper discusses two different control approaches of the qZS series resonant DC-DC converter in the buck mode: variable frequency control and phase shift modulation. Both methods are explained by means of steady-state analysis. To verify the theoretical background, a 200 W experimental prototype was built. Experimental results are compared with theoretical predictions.

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New step-up DC/DC converter with high-frequency isolation

Cited by 14 publications

References 10 publications

Practical Design Guidelines of qZSI Based Step-Up DC/DC Converter

Practical Design Guidelines of qZSI Based Step-Up DC/DC Converter

Quasi-Z-source half-bridge DC-DC converter for photovoltaic applications

Analysis of buck mode realization possibilities in quasi-Z-source DC-DC converters with voltage doubler rectifier

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