A ZVT–ZCT PWM synchronous buck converter with a simple passive auxiliary circuit for reduction of losses and efficiency enhancement

Kumar, Sandeep; Panda, Anup Kumar; Ramesh, T.

doi:10.1016/j.asej.2014.10.018

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…This paper mainly introduces ZVT-PWM. The reason why the ZVT-PWM converter is adopted is that the ZVT converter can avoid the problem of excessive turn-off loss caused by diode reverse recovery and greatly improves conversion efficiency (Ismail and Sebzali, 1998;Jahdi et al, 2011;Kumar et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Research on Efficient Soft Switching Based on MPPT of PV Power Generation System

2021

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In this paper, basic soft-switching technology is proposed based on hard switching, and then the basic soft-switching technology is optimized, and an improved soft-switching technology is proposed to improve the conversion efficiency by reducing the switching loss. The simulation results show that the conversion efficiency of hard and basic soft switching is 94.3 and 96.1%, but the conversion efficiency of improved soft switching optimized on the basis of basic soft switching is only 95.8%. To solve this problem, an innovative soft-switching technology is put forward in this paper, and its conversion efficiency is as high as 96.3%, which is superior to the basic soft-switching technology.

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Section: Introductionmentioning

confidence: 99%

Research on Efficient Soft Switching Based on MPPT of PV Power Generation System

2021

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“…The most prohibitive feature of such converters is hard commutation of switching devices, being a source of high losses as well as electromagnetic interference (EMI). The mitigation of hard switching shortcomings by introduction of various snubbing circuits to provide resonant switching transitions is not helpful due to added complexity and need for additional active elements to be commutated in the very same way (Pavlovic et al 2012;Shiva Kumar et al 2015;Bodur et al 2003;Akın 2014;Goryashin and Khoroshko 2011). The commutation itself becomes too long and quite often creates unwanted oscillations thus increasing safety margin required and limiting conversion frequency as well as regulation range.…”

Section: Introductionmentioning

confidence: 99%

LCL-T Resonant Converter Based on Dual Active Bridge Topology in Solar Energy Applications

Shinyakov

Shkolniy

et al. 2017

J.Aerosp. Technol. Manag.

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Resonant LCL-T converter can operate as stable voltage source, being fed from current, for instance, the photovoltaic battery. It is shown that LCL-T resonant tank has intrinsic ability to convert stable AC current into stable AC voltage thus parametrically regulating output voltage at a fixed value. This mode of operation is made possible by the use of active (synchronous) rectifier to recoup energy from the output back to the LCL-T resonant tank. Basic characteristics of resonant LCL-T converter regulated by phase shift between inverter and rectifier regardless of a solar battery current drift have been defined. It is shown that phase control guarantees 0 voltage and 0 current on switching; however, turn-off current could be substantial. Calculations and assumptions made in this study have been confirmed by simulation and hardware prototype.

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FITF-PDM: Unified controller design for non-isolated bidirectional DC-DC converter

Sundaramurthy¹,

Sigamani²

2017

Int Trans Electr Energ Syst

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Summary High quality and reliability of distributed power systems (DPS) play the major role in the telecommunications, industries, and home applications. The controlling of bidirectional power flow with the varied input and output voltage is the major issue in the distributed power systems due to the low settling time and the harmonics generated in them. The control signal provided to the switching devices used in the DC‐DC converter topologies is responsible for controlling the power flow. This paper presents the enhanced controller that receives the feedback signal as the input and generates the pulses necessary for the switching devices in the converter. The modeling of the feedback signal with the feedback‐integrated transfer function (FITF) provides the pulse density‐modulation (PDM) pulses to the switching section. The DC‐DC converter uses the DPS as front end, and this is a microgrid system. The FITF‐PDM reduces the losses in the switches and improves the output voltage level of the isolated bidirectional DC‐DC converter with the minimum settling time. The employment of zero current transition (ZCT) with the FITF‐PDM pulses boosts up the input voltage level to control the bidirectional power flow. The variations in the pulse density with respect to the variations in the feedback signal (error signal) are responsible for the update of the controlling function. The proposed FITF‐PDM is processes in simulation and compared with the existing control structures in terms of regulation efficiency assures the effectiveness of proposed DC‐DC modeling in the real‐time applications.

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A ZVT–ZCT PWM synchronous buck converter with a simple passive auxiliary circuit for reduction of losses and efficiency enhancement

Cited by 8 publications

References 29 publications

Research on Efficient Soft Switching Based on MPPT of PV Power Generation System

Research on Efficient Soft Switching Based on MPPT of PV Power Generation System

LCL-T Resonant Converter Based on Dual Active Bridge Topology in Solar Energy Applications

FITF-PDM: Unified controller design for non-isolated bidirectional DC-DC converter

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