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Research on Transient DC Bias Analysis and Suppression in EPS DAB DC-DC Converter [PDF]
IEEE Access, 2020 During excitation and demagnetization phase for the superconducting magnet, in dual-active-bridge (DAB) converter based power supply, a dc bias may occur in high-frequency transformer and thus lead to the faults.
Tianli Dai +6 more
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Overview of Research Status of DC Bias and Its Suppression in Power Transformers
Energies, 2022 In this article, the sources of DC bias and its effects on power transformers are first summarized. Secondly, the article classifies and summarizes the current DC bias calculation problems of power transformers, and puts forward some interesting ...
Youliang Sun +3 more
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Analysis of Harmonic Instability of Tokamak Power System Caused by Rectifier Transformer Bias
南方能源建设, 2022 [Introduction] The paper aims to effectively suppress the disturbance of non characteristic harmonics to the power grid in the tokamak power supply system, the paper studies the mechanism of low-frequency harmonics in the tokamak power supply system ...
Jiansheng WANG +3 more
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State Identification of Transformer Under DC Bias Based on Wavelet Singular Entropy
IEEE Access, 2021 To identify the DC bias state of transformers, a DC bias state identification method of transformer based on wavelet singular entropy is proposed in this paper. The vibration principle of transformers under DC bias has been analyzed.
Jun Liu +7 more
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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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IEEE Access, 2021 Conventional dc bias suppression strategies mainly rely on a single type of device, such as blocking capacitor or blocking resistance. However, these methods are passive palliatives and cannot restrain dc bias currents from the sources.
Shumin Ma +6 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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