Active-Clamping ZVS Flyback Converter Employing Two Transformers

Lo, Yu‐Kang; Lin, Jing‐Yuan

doi:10.1109/tpel.2007.909285

Cited by 109 publications

(26 citation statements)

References 12 publications

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“…MPPT, voltage boosting and dc to ac conversion are done in one stage. Such microinverters are very promising due to reduced switch count and high power density [14,15]. Other type of microinverters utilize active power decoupling that enables the use of thin film capacitors instead of electrolytic capacitors to increase the life span of the microinverter.…”

Section: Introductionmentioning

confidence: 99%

A Single-Stage CCM Zeta Microinverter for Solar Photovoltaic AC Module

Surapaneni

Rathore

2015

IEEE J. Emerg. Sel. Topics Power Electron.

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Microinverter mounted on each photovoltaic (PV) panel, i.e., microinverter is gaining popularity due to increased energy harvest. This paper proposes a novel single stage zeta microinverter for PV applications. The proposed topology is based on zeta converter with high frequency (HF) transformer isolation and a single low side switch on the primary side of transformer. The most distinctive feature of the proposed inverter is its ability to work in continuous conduction mode (CCM) over a wide load range, which results in high efficiency, reduced current stress, and components' rating. All the secondary switches operate at line frequency, thus reducing switching losses significantly. A comprehensive study of the proposed microinverter including steady-state analysis and design has been reported. A 220 W microinverter was designed, developed, and tested in the laboratory. Experimental results are demonstrated to verify the CCM operation of the inverter and its performance over a wide load range. Index Terms-Photovoltaic (PV), AC module, Zeta, Microinverter, Continuous Conduction Mode (CCM).I.

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Section: Introductionmentioning

confidence: 99%

A Single-Stage CCM Zeta Microinverter for Solar Photovoltaic AC Module

Surapaneni

Rathore

2015

IEEE J. Emerg. Sel. Topics Power Electron.

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“…In order to avoid these drawbacks, soft-switching techniques can be considered as an effective solution. These techniques are classified into two types of topologies: constant switching frequency and variable frequency converters [3][4][5][6][7][8][9][10][11][12][13][14][15]. However, the converters with constant frequency employ extra components for the soft switching that cause complex control and cost increases [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Single-Switch ZVZCS Quasi-Resonant CLL Isolated DC-DC Converter for 32'' LCD TV

Ryu¹,

Ahn²,

Cho³

et al. 2015

Journal of Electrical Engineering and Technology

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-In this paper, a single-switch ZVZCS quasi-resonant CLL isolated DC-DC converter for driving a low-power (less than 100 W) 32'' LED backlighting liquid crystal display television (LCD TV) is proposed. The proposed converter exhibits both forward and flyback operational characteristics. All semiconductors are activated and deactivated under the soft switching conditions during the switching transition without additional active devices. The switching frequency varies less than about 10 kHz for load variations, leading to minimizing the efficiency reduction under light load. Furthermore, the low di/dt and dv/dt by soft switching enhance the electromagnetic interference (EMI) performance above 1 MHz. A theoretical analysis is described in detail, and a 72-W prototype converter verifies the validity of the analysis.

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“…Until now, there have been many studies to solve the two aforementioned drawbacks [11]- [18]. However, these approaches to add many components could increase its production 0885-8993/$31.00 © 2012 IEEE cost and reduce its power density.…”

Section: Introductionmentioning

confidence: 99%

“…However, these approaches to add many components could increase its production 0885-8993/$31.00 © 2012 IEEE cost and reduce its power density. That is, the conventional approaches [11]- [18] are not practical in the standby stage. Therefore, a new approach is required to overcome these drawbacks and to maintain high-power density.…”

Section: Introductionmentioning

confidence: 99%

A New Standby Structure Based on a Forward Converter Integrated With a Phase-Shift Full-Bridge Converter for Server Power Supplies

Cho

Lee

Kim

et al. 2013

IEEE Trans. Power Electron.

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This paper presents a new standby structure where a forward converter is integrated with a dc-dc phase-shift fullbridge (PSFB) converter for server power supplies. While a typical standby structure consists of an independent flyback converter, the proposed standby structure is integrated with one leg of the dc-dc PSFB converter. Its main advantages are that the voltage across a standby switch is clamped at the link voltage across the link capacitor and that the standby switch achieves zero-voltage switching over entire load range. The validity of the proposed standby structure is confirmed by the experimental results from 12 V/58 A for the dc-dc output prototype and 11.5 V/1.5 A for the standby output prototype.Index Terms-Forward, high efficiency, integration, server power supply, standby power, zero voltage switching.

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Active-Clamping ZVS Flyback Converter Employing Two Transformers

Cited by 109 publications

References 12 publications

A Single-Stage CCM Zeta Microinverter for Solar Photovoltaic AC Module

A Single-Stage CCM Zeta Microinverter for Solar Photovoltaic AC Module

Single-Switch ZVZCS Quasi-Resonant CLL Isolated DC-DC Converter for 32'' LCD TV

A New Standby Structure Based on a Forward Converter Integrated With a Phase-Shift Full-Bridge Converter for Server Power Supplies

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