Results 121 to 130 of about 403,585 (161)

Dynamic String Interconnection with Buck Converter Topology

2010
Inhomogeneous illumination, e.g. due to partial shading of one photovoltaic module in a photovoltaic string, limits the common current of all modules of the string. Depending on the string configuration, partial shading reduces the output voltage of the string dramatically by bypassing the affected module.
Wurster, T., Merz, R., Schubert, M.B.
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Power factor preregulators based on combined buck-flyback topologies

IEEE Transactions on Power Electronics, 2000
The limitation imposed on the achievable power level by the IEC 1000-3-2 standard in buck-derived power factor preregulators, is overcome by using a combined buck-flyback power stage. Two different step-down converters are proposed in this paper, which incorporate an auxiliary flyback stage.
SPIAZZI, GIORGIO, BUSO, SIMONE
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Fault-Tolerant Design of Three-phase Dual-Buck VSI Topologies

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019
This paper presents fault tolerant topologies for the three-phase dual-buck voltage-source inverter (VSI). Using the proposed topologies, increased reliability is obtained, which is fundamental in many safety-critical applications. The solutions intend to achieve fast changing between main and redundant branches through the combination of several power
Cordeiro, Armando, Fernao Pires, Vitor, Silva, J. Fernando   +2 more
openaire   +3 more sources

A new battery equalizer based on buck-boost topology

2007 7th Internatonal Conference on Power Electronics, 2007
A new technique based on buck-boost topology is proposed to equalize a series-connected battery stack in this paper. The proposed scheme transfers the energy from fully charged battery cell to the weakest charged battery using buck-boost operation. This operation maintains batteries at the same charge and voltage level.
Sang-Hyun Park, null Tae-Sung Kim, null Jin-Sik Park, null Gun-Woo Moon, null Myung-Joong Yoon   +4 more
openaire   +1 more source

New topology for a single-phase buck-boost inverter

2018 IEEE Applied Power Electronics Conference and Exposition (APEC), 2018
This paper presents a new single-phase voltage source inverter based on two Buck-Boost dc-dc. The Buck-Boost inverter is driven by two 180° phase-shifted dc-biased sinusoidal references. This new topology can generate an instantaneous output voltage higher or lower than the input dc voltage without an intermediate power stage or transformer.
Andreas Mattos Pratto Correa, Telles Brunelli Lazzarin, Ivo Barbi   +2 more
openaire   +1 more source

An independent AC-DC converter operating on buck and buck-boost topology for low power harvesting

2017 IEEE International Conference on Power, Control, Signals and Instrumentation Engineering (ICPCSI), 2017
Independent powered devices harvest the ambient energies by micro generators and can perform their Operations without any continuous external power supply. Many types of micro-generators, used in the self-powered devices, are reported in the literature for harvesting different forms of ambient energies.
Syed Mujtaba Mahdi Mudassir, Shaik Mohammed Mukassir, Ahmeduddin Farooqi   +2 more
openaire   +1 more source

Derivation of the buck-boost PWM DC-DC converter circuit topology

2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353), 2003
The derivation of the buck-boost PWM DC-DC converter circuit is presented. The buck and boost converter circuits are cascaded through an inverting stage. Circuit theory and manipulation will be used to simplify the cascaded circuit into the familiar inverting buck-boost PWM DC-DC converter topology.
Brad Bryant, Marian K. Kazimierczuk
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Topological Design and Modulation Strategy for Buck-Boost Three-Level Inverters

2007 IEEE Power Electronics Specialists Conference, 2007
To date, designed topologies for dc-ac inversion with both voltage buck and boost capabilities are mainly focused on two-level circuitries with extensions to three-level possibilities left nearly unexplored. Contributing to this area of research, this paper presents the design of a number of viable buck-boost threelevel inverters that can also support ...
Gao, Feng, Loh, Poh Chiang, Teodorescu, Remus, Blaabjerg, Frede, Vilathgamuwa, Don   +4 more
openaire   +5 more sources

A Zero Voltage Switching Topology for Non-Inverting Buck–Boost Converter

IEEE Transactions on Circuits and Systems II: Express Briefs, 2019
This brief summarizes soft-switching methods for the non-inverting buck-boost converter (NIBBC). Then a new zero voltage switching (ZVS) NIBBC is proposed. This new NIBBC employs a triple coupled inductor, two resonant inductors, and two auxiliary diodes. All transistors of this new NIBBC will work under ZVS conditions.
Xu-Feng Cheng, Yong Zhang 0014, Chengliang Yin   +2 more
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A novel ZVS buck converter topology for VRM applications

2011 6th IEEE Conference on Industrial Electronics and Applications, 2011
The paper presents a novel ZVS buck converter topology. The proposed topology solves narrow duty cycle and hard switching problems of conventional buck converter in lower output voltage and higher output current. At the same times, the voltage stresses across main switches are also clamped at input voltage. In the topology, an adjustable inductor and a
openaire   +1 more source