Results 1 to 10 of about 108,208 (213)
Frequency Characteristics of Power Transformer for Isolated DC-DC Converter [PDF]
IEEE Access, 2022 The operational frequency of a transformer is an important factor in the configuration of an isolated DC-DC converter. However, discussions of this frequency are inadequate. This study focuses on the frequency characteristics of the transformers.
Takayuki Nakamura, Toshiyuki Murakami
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DC-compensated current transformer [PDF]
2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%.
Pavel Ripka +2 more
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Study of medium frequency transformer by using ultra‐thin silicon steel sheet in DC‐DC converter
IET Power Electronics, 2022 In order to solve the problems of poor thermal stability and high frequency noise of transformer in traditional DC‐DC converter, the medium frequency transformer in isolated DC‐DC converter is designed and studied, which adopts 0.15 mm ultra‐thin silicon
Dezhi Chen +5 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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DC Transformers in DC Distribution Systems
Energies, 2023 With the rapid development of power electronics technology and its successful application, many demonstration projects of medium/low-voltage DC (M-LVDC) distribution systems have been constructed. The DC transformer (DCT) is the key equipment in the M-LVDC distribution system for interconnecting the MVDC and LVDC buses.
Yangfan Chen, Yu Zhang
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Metrics and Strategies for Design of DC Bias Resilient Transformers
IEEE Open Access Journal of Power and Energy, 2023 Geomagnetic disturbances (GMDs) give rise to geomagnetically induced currents (GICs) on the earth’s surface which find their way into power systems via grounded transformer neutrals. The quasi-dc nature of the GICs results in half-cycle saturation
Akhil Prasad +3 more
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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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Direct usage of photovoltaic solar panels to supply a freezer motor with variable DC input voltage [PDF]
, 2020 In this paper, a single-phase photovoltaic (PV) inverter fed by a boost converter to supply a freezer motor with variable DC input is investigated. The proposed circuit has two stages.
Farzan Moghaddam, Ali +1 more
core +2 more sources
AIP Advances, 2023 The traditional ferromagnetic resonance model of the inductive voltage transformer in the IEC/TR 61869-102 transformer standard ignores the DC resistance of the transformer.
Hongwen Liu +3 more
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DC transformer for DC/DC connection in HVDC network [PDF]
2013 15th European Conference on Power Electronics and Applications (EPE), 2013 This paper presents the modeling and control of a multilevel DC/DC bidirectional converter suitable for medium voltage and power applications, with a special interest in wind-power applications. The proposed multilevel topology has a modular structure constituted by base DC/DC converter cells.
Carrizosa, Jimenez +3 more
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