Results 21 to 30 of about 1,675,720 (296)
Active DC-Bias Mitigation Method for a Single-Phase Transformer-Connected Converter through DC-Link Measurement [PDF]
, 2023 DC-bias in the magnetic flux is a common challenge for transformer-connected converters. Typically, in isolated switched-mode converters, it is induced by a DC current flowing through one or more windings of the transformer.
Baars, Nico H. +3 more
core +1 more source
Applied Sciences, 2020 The DC bias of transformers as a result of geomagnetically induced currents (GIC), monopole operation of high voltage direct current (HVDC) transmission and the increasing power electronic devices in the power grid, creates a high magnitude of ...
Bing Li +3 more
doaj +1 more source
A Novel DC Bias Suppression Strategy for Single-Phase Full-Bridge DC-DC Arc Welding Converter
, 2021 The high frequency transformer in single-phase full-bridge DC-DC converter is prone to saturation because of the asymmetry of circuit parameters. Transformer saturation will increase power consumption, accelerate the aging of winding insulation, and even
Baoqiang Cong +3 more
core +1 more source
IEEE Access, 2021 Loss and temperature increase due to DC bias occurring in power transformers may lead to damage and reduced lifespan. To study the influence of different levels of DC bias on the temperature rise in transformer structural components, 0, 8, and 16 A DC ...
Mingyang Li +4 more
doaj +1 more source
A new approach to improve dynamic characteristics of digitally controlled buck-boost dc-dc converter [PDF]
, 2010 This paper presents a new digital control buck-boost dc-dc converter with bias model to improve dynamic characteristics. The buck-boost converter needs to respond appropriately to changing input voltage and load change with wide input voltage.
Junya Sakemi +7 more
core +1 more source
An Energy-Efficient ADO-OFDM System for Optical Wireless Communication
IEEE Photonics Journal, 2023 This paper proposes an energy-efficient asymmetrically clipped direct-current (DC) biased optical orthogonal frequency division multiplexing (EEADO-OFDM) scheme, which replaces the fixed DC bias of DC biased optical OFDM (DCO-OFDM) branch with a adaptive
Wei-Wen Hu
doaj +1 more source
Design Requirement and DC Bias Analysis on HVDC Converter Transformer [PDF]
, 2021 The converter transformer plays a critical role in the high-voltage direct current (HVDC) transmission system, which connects but separates the AC grids and the converter.
Weijian Peng +9 more
core +1 more source
Stationary Hamiltonian transport with dc bias [PDF]
Europhysics Letters (EPL), 2006 The dynamics of a particle in a symmetric periodic potential under the influence of a time-periodic field is characterized by a mixed phase space with regular and chaotic components. An additional external dc bias transforms the chaotic manifold into a domain with unbounded acceleration.
Denisov, Sergey Vadimovich +2 more
openaire +2 more sources
Prediction Method of DC Bias in DC-DC Dual-Active-Bridge Converter
CPSS Transactions on Power Electronics and Applications, 2019 The dual-active-bridge (DAB) converter attracts more and more attentions due to its ability of bidirectional power transmission and high conversion efficiency. The adoption of high-frequency transformer provides galvanic isolation, but also brings the possibility of dc bias.
Liangcai Shu, Wu Chen, Zhanfei Song
openaire +1 more source
Projecting GaN HEMTs lifetimes under typical stresses commonly observed in DC-DC converters
Power Electronic Devices and Components, 2023 DC-DC converters exist in virtually every application of modern power electronics. Due to small die size, low on-resistance, and low parasitic capacitance, GaN power devices offer superior conversion efficiency and record-setting power density.
Shengke Zhang +9 more
doaj +1 more source