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A Study on the Performance of Bearingless PMSM Based on Rotor Permanent Magnet Arrangement

Transactions of the Korean Institute of electrical Engineers 2025年第4期74卷 739-746页

作者： Noh, Min-Soo Kim, Dong-Hyeon Guo, Youguang Lee, Ho-Joon Dept. of Electrical and Control Engineering Cheonju University Korea Republic of Dept. of Electronics and Electrical Engineering Dankook University Korea Republic of Dept. of Electronic Engineering Cheongju University Korea Republic of School of Electrical and Data Engineering University of Technology Sydney Australia

Magnetic bearing motors are in high demand due to their ability to operate in special environments without mechanical friction and lubrication, effectively avoiding wear and contamination. To overcome the complexity and maximum speed limitations, bearingless PMSMs (Permanent Magnet Synchronous Motors) have been developed. This study explains the electromagnetic driving principles of bearingless PMSMs based on generation conditions and the components of suspension forces. Furthermore, the permanent magnets arranged on the rotor are designed to alter the magnetic flux distribution using various magnetization patterns. FEA(Finite Element Analysis) was conducted for each model, and the derived results were compared and analyzed. This study investigates the performance of bearingless PMSMs based on different rotor permanent magnet arrangements, and draws a comprehensive conclusion. © The Korean Institute of electrical Engineers.

关键词： Permanent magnets

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Implementation of Wireless Synchronous Robotic control in 5G and Edge-Cloud Environments 22

Implementation of Wireless Synchronous Robotic Control in 5G...

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22nd IEEE Consumer Communications and Networking Conference, CCNC 2025

作者： Zhang, Weifan Rodriguez, Ignacio Mogensen, Preben Aalborg University Dept. of Electronic Systems Aalborg Denmark University of Oviedo Dept. of Electrical Engineering Gijon Spain

ISBN: (纸本)9798331508050

5G and Edge-Cloud computing play pivotal roles in fostering the flexibility and intelligence required by Industry 4.0 for modern production systems. This paper presents our investigation into deploying the control logic of two UR5e robotic arms on the Edge Cloud, utilizing 5G for communication and establishing a soft Programmable Logic controller (PLC). Leveraging the Message Queue Telemetry Transport (MQTT) and Network Time Protocol (NTP), the soft PLC coordinates the two robotic arms synchronously, mitigating the impact of the network latency variance. In the context of a concurrent delay-sensitive use case, our measurements reveal that, compared to Ethernet, wireless 5G results in 12 ms and 9 ms increases in the 99.9th percentiles of uplink times and downlink times, respectively. However, the NTP-based coordination mechanism in our implemented solution demonstrates a 77 % reduction in behavior inconsistencies caused by the 5G network latency variance in 99.98 % of cases. © 2025 IEEE.

关键词： 5G Edge Cloud PLC Robotic Synchronous

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Implementation of Wireless Synchronous Robotic control in 5G and Edge-Cloud Environments

Implementation of Wireless Synchronous Robotic Control in 5G...

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Consumer Communications and Networking Conference, CCNC IEEE

作者： Weifan Zhang Ignacio Rodriguez Preben Mogensen Dept. of Electronic Systems Aalborg University Aalborg Denmark Dept. of Electrical Engineering University of Oviedo Gijon Spain

ISBN: (数字)9798331508050

ISBN: (纸本)9798331508067

关键词： Wireless communication Program processors Protocols 5G mobile communication Service robots Robot kinematics Programmable logic devices Manipulators Telemetry Uplink

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Shape Uniformity Analysis of Injection Molded Cooling Fan Using Laser Camera

Shape Uniformity Analysis of Injection Molded Cooling Fan Us...

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International Conference on Autonomous Robots and Agents, ICARA

作者： Won Ho Kim Hyun Sul Lee Jin Ho Kim Division of Electrical Electronic and Control Engineering Kongju National University Cheonan Rep. of Korea Dept. of Industrial Engineering Kongju National University Cheonan Rep. of Korea

ISBN: (数字)9798331509231

ISBN: (纸本)9798331509248

This paper describes quality uniformity inspection of injection molded parts based on 3D laser camera. The shape uniformity of the automotive cooling fan is an important quality control indicator. An algorithm for automatically measuring the groove width and dept. of the injection molded cooling fan is presented and its practicality was evaluated. As result of computer simulation, it was confirmed that the measured two shape parameters of cooling fan can be applied to vision inspection for the classification of defective parts or used as a reliability indicator for quality control.

关键词： Fans Three-dimensional displays Cooling Shape Semiconductor lasers Measurement by laser beam Quality control Inspection Cameras Classification algorithms

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A Novel Multi-Criteria Local Latin Hypercube Refinement System for Commutation Angle Improvement in IPMSMs

arXiv

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arXiv 2025年

作者： Asef, Pedram Denai, Mouloud Paulides, Johannes J.H. Marques, Bruno Ricardo Lapthorn, Andrew Dept. of Electronic and Electrical Engineering University of Bath BA2 7AY United Kingdom Dept. of Engineering and Technology University of Hertfordshire AL10 9AB United Kingdom Advanced Electromagnetics Group Waalwijk Netherlands AE UK Ltd part of AE-Group Nottingham United Kingdom Dept. of Electrical and Computer Engineering University of Canterbury Christchurch New Zealand

The commutation angle, γ, of an interior permanent magnet synchronous motor’s (IPMSM) vector diagram, plays an important role in compensating the back electromotive force (back-EMF);both under phase current variations and an extended speed range, is required by the application. This commutation angle is defined as the angle between the fundamental of the motor phase current and the fundamental of the back-EMF. It can be utilised to provide a compensating effect in IPMSMs. This is due to the reluctance torque component being dependent on the commutation angle of the phase current even before entering the extended speed range. A real-time maximum torque per current and voltage strategy is demonstrated to find the trajectory and optimum commutation angles, γ, where the level of accuracy depends on the application and available computational speed. A magnet volume reduction using a novel multi-criteria local Latin hypercube refinement (MLHR) sampling system is also presented to improve the optimisation process. The proposed new technique minimises the magnet mass to motor torque density whilst maintaining a similar phase current level. A mapping of γ allows the determination of the optimum angles, as shown in this paper. The 3rd generation Toyota Prius IPMSM is considered as the reference motor, where the rotor configuration is altered to allow for an individual assessment. © 2025, CC BY.

关键词： Permanent magnets

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Usage of Reactive Joining Methods on LTCC Substrates: Experiments and Simulation

Usage of Reactive Joining Methods on LTCC Substrates: Experi...

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Thermal, Mechanical and Multiphysics Simulation and Experiments in Micro-electronics and Micro-systems EuroSimE

作者： Erik Wiss Nesrine Jaziri Jens Müller Steffen Wiese Dept. Systems Engineering Chair of Microintegration and Reliability Saarland University Saarbrücken Germany Electronics Technology Group Faculty of Electrical Engineering and Information Technology Technische Universität Ilmenau Ilmenau Germany

ISBN: (数字)9798350393002

ISBN: (纸本)9798350393019

Some applications in electronic packaging suffer from the global heat application used by the conventional joining technologies (e.g. soldering, welding, gluing). In contrast, local heat generation, which could be provided by reactive bonding methods, would not only enable additive joining for 3D build up assemblies, it would also protect temperature sensitive structures from being overheated and thus allows the application of a wider material spectrum (e.g. thermoplastics) in the assemblies. Therefore, it was studied, if reactive bonding methods could be expanded outside the established application areas of Si to Si and metal to metal bonding. One of the targeted material systems have been glass-ceramics like LTCC substrates. The paper gives an overview over the different approaches of simulational and experimental investigations, that had been undertaken to reactively bond LTCC substrate material with each other.

关键词： Temperature sensors Three-dimensional displays Metallization Welding Tin Nonhomogeneous media Silicon Bonding Substrates Thermal energy

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A Comparison Study in Two PMaSynRels with Different Sintered Ferrite Shapes

A Comparison Study in Two PMaSynRels with Different Sintered...

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IEEE Workshop on electrical Machines Design, control and Diagnosis (WEMDCD)

作者： Yuli Bao Shuo Wang Mauro Di Nardo Giampaolo Buticchi Michele Degano Zhenyao Xu Department of Electrical and Electronic Engineering University of Nottingham Ningbo China Ningbo China Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo China Ningbo China Dept. of Electrical Engineering and Information Technology Politecnico di Bari Bari Italy Power Electronics Machine and Control Group (PEMC) University of Nottingham Nottingham UK School of Electrical Engineering Shenyang University of Technology Shenyang China

ISBN: (数字)9798331520748

ISBN: (纸本)9798331520755

Conventional permanent magnet assisted synchronous reluctance motors (PMaSynRels) are characterized by flux barriers partially filled with rectangular sintered ferrite, resulting in barrier shapes constrained to various rectangular combinations. For PMaSynRels with bonded ferrite, flux barriers could be completed filled, but the inferior magnetic properties of bonded ferrite restrict the performance of these PMaSynRels. Thus in the paper, two PMaSynRels with non-rectangular sintered ferrite are investigated and compared to explore the maximum torque potential. Through parameterization and optimization, the final two PMaSynRels are evaluated on torque, power factor, and efficiency across diverse operating conditions. The results prove that PMaSynRel with fluid-shaped sintered ferrite has lower torque ripple than PMaSynRel with circular-shaped sintered ferrite. In terms of power factor and efficiency, the two PMaSynRels do not differ significantly,

关键词： Ferrites Reactive power Torque Fluids Manufacturing processes Shape Permanent magnets Torque measurement Optimization Reluctance motors

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Development and Applications of Periodic Variable Temperature Lifetime Model for Low Voltage Electric Machine

引用

IEEE Transactions on Transportation Electrification 2025年

作者： Zhou, Xuanming Ji, Yatai Giangrande, Paolo Zhao, Weiduo Ijaz, Salman Galea, Michael Key Lab of More Electric Aircraft Technology of Zhejiang University of Nottingham Ningbo China Ningbo315100 China University of Nottingham Power Electronic Machine Control group NottinghamNG7 2GT United Kingdom Tsinghua University Dept. of Electrical Engineering China University of Bergamo Dept. of Engineering and Applied Sciences Dalmine Italy University of Nottingham Ningbo China Ningbo315100 China University of Malta Dept. of Electrical Engineering Msida Malta

For electrified transportation applications, the winding insulation of an electrical machine (EM) is often thermally aged by variable temperature profiles. Considering the high-reliability requirement, the over-engineering approach is commonly adopted, although it conflicts with the high-power density demand. Therefore, a reliability-oriented design (RoD) methodology is preferred to find a balance between reliability and performance. In order to apply the RoD, the physics of failure mechanism of EM windings has to be investigated by performing accelerated lifetime tests (ALTs) on the electrical insulation system (EIS). Life prediction of winding is often based on constant temperature ALTs, which would lead to some inaccuracy for the EM working under variable temperature conditions. Thus, a lifetime model that accounts for aging effects caused by variable temperature profiles is needed. In this paper, the ALTs are performed at both constant and variable temperature conditions. Then, a newly developed lifetime model taking into account the thermomechanical stress is introduced based on experiment results and simulations. In this way, the EM life prediction could be obtained and more accurate in any temperature ranges and periods. Meanwhile, the practical application of the lifetime is illustrated through a case study for an aerospace motor. Then, the application paradigm of irregular temperature situation is also illustrated with a counting algorithm. To conclude, this article developed a more comprehensive life model for the variable temperature conditions, which is able to cope with real-world scenarios and improve the EM design. © 2015 IEEE.

关键词： Electric insulation

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Classification System Based on Data Mining Technique for Flat-Colored Textiles

SSRN

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SSRN 2025年

作者： Zhou, Min Lin, Yukai Hu, Wei Dai, Chai Tang, Guangfa He, Fei School of Information and Intelligent Engineering Guangzhou xinhua University Dongguan China School of Intelligent Control Hunan Railway Professional Technology College Zhuzhou China College of Electrical and Electrical Engineering Hunan University Changsha China Dept. of Pingdingshan Branch of China Mobile Communication Group Henan co. LTD Henan Pingdingshan China Dept.of Physics Electrical and Intelligent Manufacturing Huaihua University Changsha China College of Computer Science and Software Engineering Shenzhen University Shenzhen China

Manual visual inspection for defect detection in manufacturing can lead to high false positive rates. This paper compares data mining techniques for the binary classification of defects in flat products in a relatively open scenario. The background provides context on research into data mining-based detection. The methodology is divided into five sections: data collection, selection, preprocessing and transformation, classification, and model evaluation. Each section details the techniques applied, tailored to the application context, with specifying examples. Experiments apply real-world data sets self-collected from production lines. Statistics like prediction accuracy are generated by established data mining evaluation algorithms. Results indicate the efficacy of data mining for automated defect detection over manual approaches. Finally, conclusions summarize findings and discuss the limitations of the current research and planned future work to address the drawbacks. Overall, the formalized methodology and supportive experimental results demonstrate both the viability and potential areas of improvement for data mining in manufacturing quality control. © 2025, The Authors. All rights reserved.

关键词： Data accuracy

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DECENTRALIZED FEEDBACK controlLERS FOR UNCERTAIN INTERCONNECTED DYNAMIC-systems

引用

IEE PROCEEDINGS-D control THEORY AND APPLICATIONS 1993年第6期140卷 429-434页

作者： TRINH, H ALDEEN, M Control and Power Systems Group Department of Electrical and Electronic Engineering University of Melbourne Melbourne Australia

This paper presents a method for the design of decentralised controllers for interconnected dynamic systems with structured uncertainties. The design problem is formulated as a constrained linear quadratic optimal regulator problem, where the cost function is designed to incorporate the system uncertainties. Conditions are then derived for choosing the state and control weighting matrices that guarantee closed-loop stability in the presence of the uncertainties. Once these matrices are appropriately chosen, a generalised Riccati equation is solved and a robust decentralised controller is obtained. Two numerical examples are given to illustrate the controller design method.

关键词： INTERCONNECTED DYNAMIC systems DECENTRALIZED controlLERS

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