The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
Huihong Cai - One of the best experts on this subject based on the ideXlab platform.
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optimal design and implementation of high voltage high power silicon steel core medium frequency transformer
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Pei Huang, Chengxiong Mao, Da Wang, Libing Wang, Yuping Dua, Ju Qiu, Huihong CaiAbstract:A 1.5 kV, 35 kW, 1 kHz silicon steel core medium-frequency transformer is designed and prototyped for a 10 kV, 0.5 MW electronic power transformer. This transformer uses 0.18 mm silicon steel as core material due to the advantages of easy processing, high Saturation Flux Density, low noise, and low cost. The detailed design considerations and an optimal design method are presented in this paper. Different from the previous work on medium-frequency transformer design, the proposed approach takes ripples into account. Core loss model under square wave excitation with ripple and winding loss model considering sideband harmonics are established. Besides, two-dimensional finite-element simulations are adopted to obtain ac/dc resistance factors. Finally, the proposed approach is verified by experiments on prototype. The test results show performance better than expected, with desirable no-load loss and power Density of 2.9623 × 106 W/m3.
Pei Huang - One of the best experts on this subject based on the ideXlab platform.
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optimal design and implementation of high voltage high power silicon steel core medium frequency transformer
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Pei Huang, Chengxiong Mao, Da Wang, Libing Wang, Yuping Dua, Ju Qiu, Huihong CaiAbstract:A 1.5 kV, 35 kW, 1 kHz silicon steel core medium-frequency transformer is designed and prototyped for a 10 kV, 0.5 MW electronic power transformer. This transformer uses 0.18 mm silicon steel as core material due to the advantages of easy processing, high Saturation Flux Density, low noise, and low cost. The detailed design considerations and an optimal design method are presented in this paper. Different from the previous work on medium-frequency transformer design, the proposed approach takes ripples into account. Core loss model under square wave excitation with ripple and winding loss model considering sideband harmonics are established. Besides, two-dimensional finite-element simulations are adopted to obtain ac/dc resistance factors. Finally, the proposed approach is verified by experiments on prototype. The test results show performance better than expected, with desirable no-load loss and power Density of 2.9623 × 106 W/m3.
Baolong Shen - One of the best experts on this subject based on the ideXlab platform.
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ductile feni based bulk metallic glasses with high strength and excellent soft magnetic properties
Journal of Alloys and Compounds, 2018Co-Authors: Jing Zhou, Weiming Yang, Chenchen Yuan, Baolong ShenAbstract:Abstract Fe-based bulk metallic glasses (BMGs) have attracted great attention due to their excellent soft magnetic properties and high fracture strength, but few applications have been materialized as structural materials because of their brittleness at room temperature. Here, we successfully synthesized an Fe39Ni39B14.2Si2.75P2.75Nb2.3 BMG which exhibits large plastic strain of 7.8%, high fracture strength of 3.35 GPa and excellent soft magnetic properties, i.e., rather high Saturation Flux Density of 0.88 T, low coercive force of 0.7 A/m and high permeability of 20800. The results indicated that the mutual repulsion between ductility and strength could be renovated in the Fe-based BMGs by the rearrangement of atomic configurations through Ni addition. With proper combination of non-directional metal-metal bonds and directional metal-metalloid bonds, the mechanical properties of FeNi-based BMGs can be improved. Our studies provide a guideline in designing ductile FeNi-based BMGs with high strength, large GFA and excellent soft magnetic properties.
Jianping Wang - One of the best experts on this subject based on the ideXlab platform.
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minnealloy a new magnetic material with high Saturation Flux Density and low magnetic anisotropy
Journal of Physics D, 2017Co-Authors: Yanfeng Jiang, Pranav K Suri, David J Flanniga, Jianping WangAbstract:We are reporting a new soft magnetic material with high Saturation magnetic Flux Density, and low magnetic anisotropy. The new material is a compound of iron, nitrogen and carbon, α'-Fe8(NC), which has Saturation Flux Density of 2.8 ± 0.15 T and magnetic anisotropy of 46 kJ m−3. The Saturation Flux Density is 27% higher than pure iron, a widely used soft magnetic material. Soft magnetic materials are very important building blocks of motors, generators, inductors, transformers, sensors and write heads of hard disk. The new material will help in the miniaturization and efficiency increment of the next generation of electronic devices.
Md Rabiul Islam - One of the best experts on this subject based on the ideXlab platform.
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an amorphous alloy core medium frequency magnetic link for medium voltage photovoltaic inverters
Journal of Applied Physics, 2014Co-Authors: Md Rabiul IslamAbstract:The advanced magnetic materials with high Saturation Flux Density and low specific core loss have led to the development of an efficient, compact, and lightweight multiple-input multiple-output medium frequency magnetic-link. It offers a new route to eliminate some critical limitations of recently proposed medium voltage photovoltaic inverters. In this paper, a medium frequency magnetic-link is developed with Metglas amorphous alloy 2605S3A. The common magnetic-link generates isolated and balanced multiple DC supplies for all of the H-bridge inverter cells of the medium voltage inverter. The design and implementation of the prototype, test platform, and the experimental test results are analyzed and discussed. The medium frequency non-sinusoidal excitation electromagnetic characteristics of alloy 2605S3A are also compared with that of alloy 2605SA1. It is expected that the proposed new technology will have great potential for future renewable power generation systems and smart grid applications.
