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CES Transactions on Electrical Machines and Systems 2022年第3期6卷 288-297页

作者： Yu Li Guangwei Liu Wenping Cao Fengge Zhang the School of Electrical Engineering Shenyang University of TechnologyShenyang and 110870China IEEE the School of Engineering and Applied Science Aston UniversityBirmingham and B47ETUK

High-speed motor has the characteristics of high frequency, high temperature, and more stress, resulting in the field distribution inside the motor being complicated. To better study the electromagnetic characteristics of silicon steel sheet for high-speed motor. In this article, a study on the calculation model of silicon sheet electromagnetic characteristics considers the effects of electromagnetic, stress, and temperature factors. The study is divided into two parts, one is to propose the calculation model of silicon steel sheet’s permeability;the other is to improve the calculation model of silicon steel sheet’s loss. Then, the magnetic field, stress field, and temperature field of a surface mount high speed permanent magnet motor(SMHSPMSM) are analyzed by finite element method(FEM), and the results under the consideration of magnetic, stress, and temperature factors are brought into the calculation model for calculation. Finally, the accuracy of the calculation model for electromagnetic characteristics of silicon steel sheet is verified by comparing the calculated results with the finite element results.

关键词： Calculation model Silicon steel sheet electromagnetic characteristics Magnetic Stress Temperature

Simulation research on scattering characteristics by complex targets

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Journal of Systems Engineering and Electronics 2007年第4期18卷 685-691页

作者： Guo Kunyi Sheng Xinqing Center for electromagnetic Simulation School of Information Science and Technology Beijing Inst. of Technology Beijing 100081 P. R. China

A simulation approach based on a full-wave numerical method is presented to study electromagnetic characteristics by complex targets. How to validate simulation results is considered thoroughly under no analytical and measured data, where a double-check criterion is designed for our simulation approach. As an example, the scattering of F-117A is studied by using our simulation approach under all polarizations, different frequency bands, incident and scattering directions, etc., some of which, such as cross-polarization, bistatic RCS, have not been considered in the previous literature.

关键词： electromagnetic characteristics simulation complex targets hybrid FE-BI-MLFMA.

Effect of octahedron tilt on the structure and magnetic properties of bismuth ferrite

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Journal of Advanced Ceramics 2020年第5期9卷 641-646页

作者： Yang HONG Jun LI Han BAI Zhenjia SONG Ming WANG Zhongxiang ZHOU School of Physics Harbin Institute of TechnologyHarbin 150001China

Multiferroic BiFeO_(3)-based ceramics were synthesized using the rapid liquid-phase sintering *** rare-earth ion(Sm^(3+),Gd^(3+),Y^(3+))doping causes structural distortion without changing the intrinsic rhombohedral perovskite *** analysis shows that the effect of doping on E modes is greater than A1 modes,and the microstructure of FeO_(6) octahedron can be regulated by ion doping.A-site trivalent ion doped ceramics exhibit improved magnetism compared with pure BiFeO_(3) ceramic,which originated from the suppressed spiral spin structure of Fe *** tilt of FeO_(6) octahedron as a typical structure instability causes the anomalous change of the imaginary part of permittivity at high frequency,and doped ceramics exhibit natural resonance around 16-17 GHz.

关键词： bismuth ferrite(BiFeO_(3)) magnetism octahedron tilt Raman spectrum electromagnetic characteristics

Performance Analysis and Comparison for Two Topologies of Flux-Switching Permanent Magnet Machine

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CES Transactions on Electrical Machines and Systems 2020年第3期4卷 190-197页

作者： Xu Zhang Wei Zhang Xingyan Liang Ping Lu Nantong University

Flux-switching permanent magnet(FSPM)machine is a kind of stator-typed permanent magnet machine,which is suitable for driving electric vehicles and hybrid electric vehicles because of their large power/torque density and high *** axial field flux-switching permanent magnet machine(AFFSPMM)and radial field flux-switching permanent magnet machine(RFFSPMM)with H-typed iron cores are reached and compared in this *** the condition of the same outer diameters and total volumes,the electromagnetic performances of the two machines are analyzed and compared by the three-dimensional finite element method,including the air gap flux density,inductance,back electromotive force(EMF),electromagnetic torque and *** finite element results show that the copper loss of AFFSPMM is higher than that of RFFSPMM at the rated load,however,the total loss of AFFSPMM is lower than that of the ***,AFFSPMM has greater torque than RFFSPMM in the constant power *** related experiments are done to validate the finite element results,which are basically consistent with experiment results.

关键词： Flux-switching permanent magnet machine finite element method electromagnetic characteristics torque loss

Optimization Design of Halbach Permanent Magnet Motor Based on Multi-objective Sensitivity

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CES Transactions on Electrical Machines and Systems 2020年第1期4卷 20-26页

作者： Shuangshuang Zhang Wei Zhang Rui Wang Xu Zhang Xiaotong Zhang School of Electrical Engineering Nantong UniversityNantong226019China

The halbach permanent magnet synchronous motor(HPMSM)combines the advantages of permanent magnet motors and halbach arrays,which make it very suitable to act as a robot joint motor,and it can also be used in other fields,such as electric vehicles,wind power generation,*** first,the sizing equation is derived and the initial design dimensions are calculated for the HPMSM with the rated power of 275W,based on which the finite element parametric model of the motor is built up and the key structural parameters that affect the total harmonic distortion of air-gap flux density and output torque are determined by analyzing multi-objective *** the structure parameters are optimized by using the cuckoo search ***,in view of the problem of local overheating of the motor,an improved stator slot structure is proposed and *** the condition of the same outer dimensions,the electromagnetic performance of the HPMSM before and after the improvement are analyzed and compared by the finite element *** is found that the improved HPMSM can obtain better performances.

关键词： Halbach permanent magnet synchronous motor multi-objective sensitivity cuckoo search algorithm electromagnetic characteristics finite element analysis