Prof. Yanfeng Tian Profile

Prof. Yanfeng Tian

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Proceedings Article | 16 June 2023 Paper

Design and cogging torque optimization of yokeless and segmented armature disc motor

Chengyu Nie, Yanfeng Tian, Jixin Zhang

Proceedings Volume 12639, 126390T (2023) https://doi.org/10.1117/12.2681812

KEYWORDS: Magnetism, Design and modelling, Electromagnetism, 3D modeling, Composites, Finite element methods

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Axial flux motor has the advantages of short axial size, flat and compact structure, high efficiency and power density, and has a very broad application prospect in electric vehicle drive, wind power generation and other fields. In this paper, a drive motor for electric vehicles with a power of 25 kW, rated voltage of 200 V and rated speed of 3000 rpm is designed by using the yokeless and segmented armature (YASA) disk structure. Some size formulas are given, and its output characteristics are analyzed. And then, the cogging torque is reduced by the method of the permanent magnet skewing pole and the stator shoe shifting. Finally, the finite element 3-D model and calculation are built by ANSYS. The results show that the electromagnetic scheme design is reasonable, and also verify the availability of the permanent magnet skewing pole and the stator shoe shifting to suppress the cogging torque, which has reference significance for the research of YASA motor.

Proceedings Article | 26 January 2021 Paper

Design of electromagnetic pulse crimping device

Changle Yu, Yuanda Zhu, Hui Zhao, Su Zhang, Wenwen Li, Yanfeng Tian

Proceedings Volume 11767, 117671C (2021) https://doi.org/10.1117/12.2592252

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In the fields of electrical, automation, power transmission and transformation engineering, rail transit, aerospace and other fields, the connection of wires and cables is an important link in the safe operation of electrical lines and the whole system, and the demand for lightweight connection technology is more urgent. Traditional wire and cable connection, this way is not difficult to cause cable joints loose, corrosion and aging phenomenon, there are many potential hazards. Therefore, enhancing the connection method of wire and cable joint and improving the processing quality and reliability of cable joint is essential measures for the technological progress of various enterprises related to wire and cable. In this paper, the principle, characteristics, realization process, forming condition and quality effect of the welding joint are dealt within detail. The experimental results show that the welding effect is very good, the dissimilar materials are closely linked without gap, the welding process takes a very short time, there is no smoke, gas generation, green environmental protection.

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