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Bandyopadhyay, S. (author), Dong, J. (author), Ramirez Elizondo, L.M. (author), Bauer, P. (author)Inductive power transfer (IPT) is gaining popularity across a wide range of battery charging applications like biomedical, consumer electronics and electric vehicle (EV) charging. One of the major challenges in designing IPT charge pads is determining the optimal physical sizes of the magnetic couplers resulting in efficient power transfer...conference paper 2018
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Asef, Pedram (author), Perpina, Roman Bargallo (author), Barzegaran, M. R. (author), Dong, J. (author), Lapthorn, Andrew (author), Mohammed, Osama A. (author)The paper presents an advanced quasi-FEA technique on the iron losses prediction using Bertotti’s iron loss separation models, in which a curve fitting is taken into account for coefficients calculation of each model. Moreover, the skin effect and saturation consideration are applied in order to check the accuracy through the relative error...journal article 2018
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Wani, F.M. (author), Shipurkar, U. (author), Dong, J. (author), Polinder, H. (author)This paper proposes a simplified approach to model the thermal behavior of the insulated gate bipolar transistors (IGBTs) in a subsea power electronic converter. The models are based on empirical relations for natural convection in water, and IGBT datasheet values. The proposed model can be used in the design of subsea converters and in the...journal article 2018
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Wani, F.M. (author), Dong, J. (author), Yadav, Avinash (author), Polinder, H. (author)Flooded Generators have been proposed as a possible solution to eliminate the risks due to the seal failure, and improve cooling in tidal stream turbine generators. In a flooded generator, the stator-rotor gap is filled with the seawater; this poses a serious corrosion risk to the material inside the generator. For this reason, a can or a...conference paper 2018
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Wani, F.M. (author), Dong, J. (author), Polinder, H. (author)Permanent magnet machines with fractional slot windings are popular because of their shorter end windings, low cost and ease of manufacturing. On the other hand, fractional slot machines have higher eddy current losses in the rotor magnets and sleeve. An accurate calculation of these losses usually involves a time-stepped finite-element analysis...conference paper 2018
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Shipurkar, U. (author), Dong, J. (author), Polinder, H. (author), Ferreira, Jan Abraham (author)Modularity is promising from a view to increasing turbine availability through fault tolerant operation as well as reduced downtimes, especially for offshore wind turbines. This paper focuses on a quantitative analysis of large scale (or extreme) modularity in power electronic converters of wind turbine generator systems. It uses mathematical...journal article 2018
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Dong, H. (author), Zhang, H. (author), Zuo, Y. (author), Gao, P. (author), Ye, G. (author)Mercury intrusion porosimetry (MIP) measurements are widely used to determine pore throat size distribution (PSD) curves of porous materials. The pore throat size of porous materials has been used to estimate their compressive strength and air permeability. However, the effect of sample size on the determined PSD curves is often overlooked....journal article 2018
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Dong, H. (author)Concrete is currently the most widely used material in construction field. A good performance of concrete structures is required for reaching the designed service life. However, the initial scatter in the quality of concrete is unavoidable in practice, possibly resulting from improper design, poor execution, or deterioration due to stresses...doctoral thesis 2018
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Wani, F.M. (author), Shipurkar, U. (author), Dong, J. (author), Polinder, H. (author)Improving availability of tidal turbines has been identified as a key area to lower the levelized cost of energy from tides. One of the approaches suggested to achieve high reliability is to use a flooded permanent magnet (PM) generator. Flooded PM generators are designed to operate with a seawater filled stator-rotor gap in the generator. Using...conference paper 2019
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Dong, J. (author), Viré, A.C. (author), Ferreira, Carlos (author), Li, Zhangrui (author), van Bussel, G.J.W. (author)A modified free-wake vortex ring model is proposed to compute the dynamics of a floating horizontal-axis wind turbine, which is divided into two parts. The near wake model uses a blade bound vortex model and trailed vortex model, which is developed based on vortex filament method with straight lifting lines assumption. By contrast, the far wake...journal article 2019
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Bandyopadhyay, S. (author), Prasanth, V. (author), Dong, J. (author), Bauer, P. (author)Inductive power transfer (IPT) is becoming increasingly popular in stationary electric vehicle (EV) charging systems. In this paper, the influence of the different IPT coupler geometries on the performance factors such as efficiency, power density, misalignment tolerance, and stray field is studied. Four different coupler topologies, namely...journal article 2019
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Guo, Baocheng (author), Huang, Yunkai (author), Peng, Fei (author), Dong, J. (author)This paper proposes an analytical model for the prediction of airgap magnetic field distribution for axial flux permanent magnet (AFPM) machine with partial magnet demagnetization. The AFPM machine geometry is first converted to a polar representation. Consequently, the subdomain model based on current sheet technique is developed. Then...journal article 2019
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Zhang, Wenqian (author), Dong, Wenhan (author), Dong, Shuangyu (author), Lv, Maolong (author), Liu, Zongcheng (author)A novel scheme for disturbance observer is designed for an extended class of strict-feedback nonlinear systems with possibly unbounded, non-smooth, and state-independent compounded disturbance. To overcome these problems in disturbance observer design, the typical slide mode differentiators are improved by introducing hyperbolic tangent...journal article 2019
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Cao, Z. (author), Dong, J. (author), Wani, F.M. (author), Polinder, H. (author), Bauer, P. (author), Peng, Fei (author), Huang, Yunkai (author)A novel controller design procedure is proposed for a 5-degree-of-freedom (DOF) active magnetic bearing (AMB) system, based on sliding mode control (SMC) and neural network (NN). The SMC is used to achieve high robustness and fast response while the NN can compensate unmodeled uncertainty and external disturbance by on-line tuning algorithm. The...conference paper 2019
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Shi, W. (author), Dong, J. (author), Bandyopadhyay, S. (author), Grazian, F. (author), Soeiro, Thiago B. (author), Bauer, P. (author)This paper aims to identify the difference between foreign object (FO) and misalignment in terms of their influence on inductive power transfer (IPT) systems. This is performed through magnetic and equivalent circuit analysis of the mutual inductance, primary input impedance, charging pad terminal impedance and current harmonics. Experiment...conference paper 2019
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Wang, Lu (author), Qin, Z. (author), Dong, J. (author), Bauer, P. (author)In recent years, electrical vehicle (EV) starts showing its unique advantages that the conventional combustion vehicles do not have. Together with the increasing interests on EV, the motor drive with higher efficiency and lighter weight also becomes more attractive. A promising solution is to apply the wide band gap (WBG) components including...conference paper 2019
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Dong, Xichao (author), Hu, Jiaqi (author), Hu, Cheng (author), Li, Y. (author), Sun, Shiyu (author)The sub-satellite track of geosynchronous synthetic aperture radar (GEO SAR) presents the figure "8" or "O", which causes the great changes of platform motion direction and the different projection of anisotropic irregularities along the line-of-sight (LOS) direction. Due to the almost equal angle velocity to that of Earth, the GEO SAR has...journal article 2019
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Guo, Baocheng (author), Huang, Yunkai (author), Peng, Fei (author), Dong, J. (author)In this paper, a new hybrid model is proposed for the prediction of air gap magnetic field distribution (MFD) in interior permanent magnet machines with any rotor configuration. The slotless magnetic field is first predicted by finite-element method (FEM) with automatic scripting in MATLAB to consider saturation in the rotor iron. Afterward,...journal article 2019
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Lu, Y. (author), Dong, Jianzhi (author), Steele-Dunne, S.C. (author)The spatial heterogeneity and temporal variation of soil moisture and surface heat fluxes are key to many geophysical and environmental studies. It has been demonstrated that they can be mapped by assimilating soil thermal and wetness information into surface energy balance models. The aim of this work is to determine whether enhancing the...journal article 2019
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Tieves, F. (author), Willot, S.J. (author), van Schie, M.M.C.H. (author), Rauch, M.C.R. (author), Younes, S.H.H. (author), Zhang, W. (author), Dong, J. (author), Gomez de Santos, P. (author), Hollmann, F. (author)An increasing number of biocatalytic oxidation reactions rely on H <sub>2</sub> O <sub>2</sub> as a clean oxidant. The poor robustness of most enzymes towards H <sub>2</sub> O <sub>2</sub> , however, necessitates more efficient systems for in situ H <sub>2</sub> O <sub>2</sub> generation. In analogy to the well-known formate dehydrogenase to...journal article 2019