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SSRN 2024年

作者： Yin, Shubin Huang, Zibin Zhao, Wei Li, Hongming Ji, Wei Tang, Yong Zhang, Shiwei Shui, Qin Huang, Haoyi Intelligent Manufacturing Engineering Laboratory of Functional Structure and Device in Guangdong School of Mechanical and Automotive Engineering South China University of Technology Guangzhou510640 China GuangZhou Light Industry School Guangzhou510650 China Sandvik Coromant Stockholm126 79 Sweden

Permanent magnet synchronous motors (PMSMs) have the advantages of high efficiency, high energy density, high control accuracy, etc., and have been widely applied in electric vehicles. However, with the increasing power density requirement of motors, heat dissipation has become key for further improving the power density. The end winding of the motor faces the worst heat dissipation conditions considering the winding far away from the cooling-housing. To improve the heat dissipation conditions of end windings, this research proposes an efficient heat dissipation strategy for liquid-cooling PMSMs based on a 3D high thermal conductivity network (HTCN). High-efficiency thermal conductivity channels are established between the end winding and cooling-housing based on 3D HTCN to enhance the heat dissipation of the end winding and improve the power density of the motor. The effectiveness of the proposed scheme is proven through a series of simulations and temperature rise experiments. The maximum temperature of the end winding in the present scheme, HTICM-HTCN, is 30.4% and 21.42% lower than that in the TG and HTCIM schemes, respectively, under 90.8A current, and 34.03% and 28.30% lower under 108.8A operating conditions, respectively. Moreover, the equivalent thermal conductivity of HTCIM+HTCN is 150% greater than that of HTCIM © 2024, The Authors. All rights reserved.

关键词： Housing

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Design and Performance Optimization of 3d Vapor Chamber for Thermal Management of Permanent Magnet Synchronous Motors

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SSRN 2024年

作者： Zhang, Shiwei Chen, Boyang Shui, Qin Yin, Shubin Ji, Wei Huang, Zibin Tang, Yong Intelligent Manufacturing Engineering Laboratory of Functional Structure and Device in Guangdong School of Mechanical and Automotive Engineering South China University of Technology Guangzhou510640 China GuangZhou Light Industry School Guangzhou510650 China Sandvik Coromant Stockholm126 79 Sweden Changnengda Technology Development Co. Ltd Guangzhou510700 China

Vapor chamber is a key to further improve the heat dissipation performance of thermal conductive adhesives (TCA) based traditional cooling scheme for permanent magnet synchronous motors (PMSMs). However, practical operating conditions and the heat curing process of TCA impose strict requirements on the VC, such as 3D profile and anti-expansion. To address mentioned issues, this paper introduces a high thermal conductivity 3DVC for PMSMs, designed with special internal support structures to achieve both high thermal performance, anti-expansion and bendability. The simulation results indicate the maximum expansive deformation of the VC with presented structure under 125 °C is 0.066 mm. A series of heat transfer experiments were then conducted to evaluate the bendability of the presented structure and the enhancement of 3DVC on heat dissipation of TCA. The results suggest that the proposed 3DVC achieves an effective thermal conductivity of 4426.73 W/m·K and a thermal resistance of 0.136 °C/W at a 100 W heating load. Moreover, the 3DVC based TCA strategy withstands a heat load of 143.93 W at a cutoff temperature of 90 °C, which is 82.1% higher than traditional scheme. © 2024, The Authors. All rights reserved.

关键词： Adhesives

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UTVC based thermal management of air-cored linear synchronous motor for high-precision CNC machine tool

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Thermal Science and engineering Progress 2025年 63卷

作者： Junxiang Wang Shiwei Zhang Haoyi Huang Hongming Li Shubin Yin Wei Yuan Yong Tang Intelligent Manufacturing Engineering Laboratory of Functional Structure and Device in Guangdong School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 PR China

Air-cored linear synchronous motors, known for their high precision and transmission efficiency, are increasingly used in the high-precision manufacturing industry. However, motor temperature rise leads to thermal deformation of machine tools, introducing unpredictable errors. To mitigate this issue, this study proposes an ultra-thin vapor chamber-based thermal management strategy. The vapor chamber is positioned between the motor windings and the cooling base. A series of thermal tests demonstrate the effectiveness of the proposed strategy. Compared to liquid-cooling and air-cooling methods, the maximum motor temperature is reduced by 37.2 °C and 32.7 °C, respectively, under rated power, while the maximum thrust is increased by 31.7 % and 42.1 %, respectively, at the same temperature limits.

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Manipulating Photonic Spin Hall Split Based on Nonlinear Effect and Surface Plsamon Resonance

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SSRN 2024年

作者： Zeng, Zhimin Liang, Junhang Guo, Liang Deng, Dongmei Zhang, Li Liang, Chengkang Wang, Guanghui Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter School of Information and Optoelectronic Science and Engineering South China Normal University Guangzhou510006 China Guangzhou Panyu Polytechnic School of Intelligent Manufacturing Guangzhou511483 China School of Materials Shenzhen Campus of Sun Yat-Sen University Guangzhou518107 China

In this work, we present a surface plasmon resonance ( SPR ) structure containing AuAl2 and a nonlinear Kerr medium. Based on the modulation of the refractive index of the Kerr medium by pumped light, we analyze the effects of the SPR structure and pumped light on the photonic spin Hall effect ( PSHE ). The numerical result indicate that the thickness of the metal layer exerts a profound impact on the SPR, while the intensity of the pump light ( Ip ) exerts a significant influence on the resonance angle. The transverse shift ( TS ) is very sensitive to the refractive index ( RI ) of the sensing layer after increasing through the SPR. Furthermore, it is observed that the sign of the TS of the PSHE can be modulated according to Ip within a specific angle of incidence. In light of these findings, we put forth a novel optical signal modulation and RI sensing scheme based on PSHE. Our study provides a new mechanism for practical applications of PSHE in optical communication and precision measurement. © 2024, The Authors. All rights reserved.

关键词： Surface plasmon resonance

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