Results 1 to 10 of about 1,018 (138)

Light and polyphosphate kinase 2 cooperatively regulate the production of zero-valent sulfur in a deep-sea bacterium [PDF]

open access: yesmSystems
It is well established that different wavelengths of light exist in various deep-sea environments, and many deep-sea microorganisms have evolved specialized mechanisms for sensing and utilizing light energy.
Tianhang Zhang, Ruining Cai, Chaomin Sun
doaj   +2 more sources

Performance analysis of ZVS and ZCS boost converters for Solar Photo Voltaic Applications [PDF]

open access: yesE3S Web of Conferences, 2023
This paper describes a useful modulated, asymmetric full-bridge converter for sustainable solar PV applications. The suggested converter achieves zero-voltage switching (ZVS) on the main side’s power switches and reduces circulating current loss by ...
Gireesh Kumar Devineni   +5 more
doaj   +1 more source

ZVS-Optimized Constant and Variable Switching Frequency Modulation Schemes for Dual Active Bridge Converters

open access: yesIEEE Open Journal of Power Electronics, 2023
This paper proposes two modulation schemes for Dual Active Bridge (DAB) converters, with the aim of maximizing Zero Voltage Switching (ZVS) operation over a wide operational range.
Dingsihao Lyu   +4 more
doaj   +1 more source

Novel Soft-Switching Integrated Boost DC-DC Converter for PV Power System

open access: yesEnergies, 2020
This paper presents a novel soft-switching boost DC-DC converter, which uses an edge-resonant switch capacitor based on the pulse width modulation PWM technique.
Khairy Sayed   +2 more
doaj   +1 more source

A deep‐sea sulfate‐reducing bacterium generates zero‐valent sulfur via metabolizing thiosulfate

open access: yesmLife, 2022
Zero‐valent sulfur (ZVS) is a crucial intermediate in the sulfur geobiochemical circulation and is widespread in deep‐sea cold seeps. Sulfur‐oxidizing bacteria are thought to be the major contributors to the formation of ZVS.
Rui Liu   +4 more
doaj   +1 more source

Dynamic Level Changing for Full Range ZVS in Flying Capacitor Multi-Level Converters

open access: yesIEEE Open Journal of Power Electronics, 2022
This paper presents a control technique for flying capacitor multi-level (FCML) converters to achieve zero-voltage switching (ZVS) across the full range of duty cycles, with application in high power density and high efficiency power converters. Previous
Margaret E. Blackwell   +2 more
doaj   +1 more source

A T-Type DC-DC Converter With Reduced Middle-Leg Switch Current Stress and Improved Light-Load Efficiency

open access: yesIEEE Open Journal of Power Electronics, 2020
The ZVS T-type converter can be used as an alternative to the conventional ZVS-PWM full-bridge (FB) converter for applications where improved light-load operation is required.
Javad Khodabakhsh, Gerry Moschopoulos
doaj   +1 more source

High‐frequency single‐switch PFC with frequency‐modulation controlled class‐E2 converter

open access: yesIET Power Electronics, 2021
This paper presents a single‐switch zero‐voltage switching (ZVS) power‐factor correction converter based on the class‐E2 converter at 1 MHz switching frequency. A design method for ensuring the ZVS for the entire line‐voltage period is proposed.
Wenqi Zhu   +5 more
doaj   +1 more source

A Full Load Range ZVS Isolated Three-Level DC/DC Converter with Active Commutation Auxiliary Circuit Suitable for Electric Vehicle Charging Application

open access: yesApplied Sciences, 2022
The isolated three-level DC/DC converter (ITLDC) can be used to charge electric vehicles. During the constant current charging stage, the ITLDC can be designed to realize nature zero voltage switching (ZVS).
Shaogui Fan   +4 more
doaj   +1 more source

Zero-Voltage-Switching Analysis Model of the Triple-Active-Bridge Converter

open access: yesEnergies, 2023
This study aims to analyze the zero-voltage-switching (ZVS) region of a Triple-Active-Bridge (TAB) converter with five degrees of freedom. A TAB converter is an isolated converter derived from a dual-active-bridge (DAB) converter and composed of three ...
Hyung-Jun Byun   +3 more
doaj   +1 more source

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