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RISS 인기검색어
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- 저자 : Ni Youyuan (검색결과 3 건)
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General Analytical Model of Dual-Modulation Permanent Magnet Vernier Machine with Halbach Arrays
Ni Youyuan,Qiu Zhiwei,Xiao Benxian 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1
General analytical model is proposed for dual-modulation permanent magnet vernier machines (PMVM) having consequent pole Halbach arrays at both stator slot opening and rotor slot. From the Laplace/Poisson equations of each region, the subdomain model and the solution process for the dual-modulation PMVM are analyzed. Taking 22p/12 s machines as examples, which having two-segment consequent pole Halbach arrays in both the stator and the rotor, the air gap feld is obtained by solving the matrix equation. The induced electromotive force and the electromagnetic torque are calculated. The relevant fnite element analysis results verify the accuracy of the analytical results. In addition, the optimization results for the Halbach arrays are also presented.
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Ni Youyuan,Zhang Xin,Chen Qiuming,Huang Ya,Wang Qunjing 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3
The electromagnetic performances of surface-inset machines with two layer equal/unequal magnet-arc Halbach magnets are compared. The magnetic feld distribution is analytically obtained by analyzing the outer/inner layer Halbach magnets separately. Through presented analytical technique, the magnetization angles of each layer Halbach magnets are analytically optimized. Considering the practical application of relatively large usage of magnets, the larger the outer layer magnet-arc ratio, the better the performances. The analytical predictions show that the optimal two layer unequal magnet-arc Halbach machine has a much higher sine degree of both the airgap fux density and the back-electromotive force and a much lower torque ripple than the optimal two layer equal magnet-arc Halbach machine. The fnite element analysis and analytical prediction results are compared.
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A Novel Semi-inserted Dual-stator Low-speed High-torque Permanent Magnet Drive Motor
Jiwei Liu,Xiaohua Bao,Youyuan Ni,Mingji Zou Korean Magnetics Society 2018 Journal of Magnetics Vol.23 No.4
Low-speed high-torque permanent magnet direct drive machine (LSPMDM) overcomes the shortcomings of traditional drive system, but its volume is large. In this paper, the numerical relationship between the motor external diameter and the rated speed is deduced, and improvement of the torque density is qualitatively analyzed for a dual-stator motor. Owing to that semi-inserted magnetic circuit structure and auxiliary slots under the poles can further increase the torque density of the motor, the effect of the shape, number and position of the auxiliary slots on the salient pole rate is also studied through comparative analysis. By incorporating the merits of dual-stator motor and semi-inserted magnetic circuit structure with the auxiliary slots, a novel motor topology is proposed, which is verified by finite element analysis with good performance.
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