Results 11 to 20 of about 122,819 (262)
Transient DC bias suppression of three‐port isolated DC–DC converter [PDF]
IET Power Electronics, 2020 Three‐port isolated dc–dc converter, as an active exploration and trial of photovoltaic access to dc distribution system, has the advantages of superior control flexibility and high reliability. Due to the changes in the phase‐shift (PS) angle, the conventional PS control method cause transient dc bias in inductor current and magnetisation current ...
Chunming Tu +4 more
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Machine learning for DCO-OFDM based LiFi.
PLoS ONE, 2021 Light fidelity (LiFi) uses different forms of orthogonal frequency division multiplexing (OFDM), including DC biased optical OFDM (DCO-OFDM). In DCO-OFDM, the use of a large DC bias causes optical power inefficiency, while a small bias leads to higher ...
Krishna Saha Purnita +1 more
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Transmitting CMUT Arrays without a DC Bias [PDF]
2019 IEEE International Ultrasonics Symposium (IUS), 2019 This study focuses on design, simulation, fabrication and measurement of transmitting CMUT arrays with unbiased mode of operation. We presented a design procedure considering the radiation pattern, Rayleigh distance and the parameters of the large signal equivalent circuit, which can be applied for different operation frequencies and applications ...
Enhoş, Kerem +4 more
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Self-Test and Self-Calibration of Digital Closed-Loop Accelerometers
Sensors, 2022 For accelerometers targeted in inertial navigation field, the DC bias error is the most destructive system error, affecting the final precision of long-term dead reckoning.
Zhiyuan Sun, Miao Wang
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Energy Reports, 2022 When a transformer is in the DC bias state, a series of consequences will occur. Mainly including excitation current distortion, losses increase, hot spot temperature rise and vibration and noise increase, these consequences are not conducive to the safe
Yidan Hu, Junhao Li
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Dielectric behavior and phase transition in [111]-oriented PIN–PMN–PT single crystals under dc bias [PDF]
Journal of Advanced Dielectrics, 2014 Temperature and electric field dependences of the dielectric behavior and phase transition for [111]-oriented 0.23PIN–0.52PMN–0.25PT (PIN-PMN–0.25PT) and 0.24PIN–0.43PMN–0.33PT (PIN–PMN–0.33PT) single crystals were investigated over a temperature range ...
Yuhui Wan +6 more
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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
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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
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DC-Bias for Optical OFDM in Visible Light Communications [PDF]
IEEE Access, 2019 The requirement of a DC-bias is known to make DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) less energy efficient. This can be improved by asymmetrically clipped optical OFDM (ACO-OFDM), pulse amplitude modulated OFDM (PAM-OFDM) or Flip-OFDM, but these variants use the bandwidth inefficiently.
Xiong Deng +3 more
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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
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