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Analysis of the Comprehensive Physical Field for a New flywheel energy storage Motor/Generator on Ships

Journal of Marine Science and Application 2012年第1期11卷 134-142页

作者： Yali Yu Yuanxi Wang Guosheng Zhang Feng Sun Research Institute of energy storage Technology and Application Harbin Engineering University Department of Automation Harbin Engineering University

A novel flywheel energy storage （FES） motor/generator （M/G） was proposed for marine systems. The purpose was to improve the power quality of a marine power system （MPS） and strengthen the energy recycle. Two structures including the magnetic or non-magnetic inner-rotor were contrasted in the magnetostatic field by using finite element analysis （FEA）. By optimally designing the size parameters, the average speed of FEA results of was 17 200 r/m, and the current was controlled between 62 and 68 A in the transient field. The electrical machine electromagnetism design was further optimized by the FEA in the temperature field, to find the local overheating point under the normal operation condition and provide guidance for the cooling system. Finally, it can be concluded from the comprehensive physical field analysis that the novel redundant structure M/G can improve the efficiency of the M/G and maintain the stability of the MPS.

关键词： marine power system flywheel energy storage Halbach array magnet structure comprehensivephysical field motor/generator finite element analysis

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REVIEW OF flywheel energy storage SYSTEM

REVIEW OF FLYWHEEL ENERGY STORAGE SYSTEM

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2007世界太阳能大会：太阳能与人类居住

作者： Zhou Long Qi Zhiping Institute of Electrical Engineering CAS Qian yan Department P.O.box 2703 Beijing 100080 China

＜正＞As a clean energy storage method with high energy density, flywheel energy storage（FES）rekindles wide range interests among *** the rapid development of material science and power electronics,great progress has been made in FES *** used to fabricate the flywheel rotor has switched from stone, stainless-steel to the latest composite *** the introduction of magnetic bearing and high-efficient motor/generator,FES becomes a powerful competitor to chemical battery and develops wider application fields. This paper describes the latest developments and design considerations of FES ***,bearing suspension system,motor/generator are the key parts of a FES *** main factors like total energy losses, safety,cost control are ***,application area of FES technology is presented including energy storage and attitude control in satellite,high-power uninterrupted power supply（UPS）,electric vehicle（EV）,power quality problem.

关键词： flywheel energy storage rotor magnetic bearing UPS power quality problem.

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Reaserch on Characteristic of the flywheel energy storage Based on the Rotating Electromagnetic Voltage Converter

Reaserch on Characteristic of the Flywheel Energy Storage Ba...

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The 2011 International Conference on Electric and Electronics(EEIC 2011)

作者： Baoquan Kou Haichuan Cao Jiwei Cao Xuzhen Huang School of Electrical Engineering and Automation Harbin Institute of Technology

Rotating electromagnetic voltage converter（REVC） is a new structure voltage conversion *** has many functions including voltage change,reactive power compensation,harmonics isolation and *** energy storage device possesses the characteristic of high-power and fast-speed *** loading the flywheel,REVC can output mechanical energy of the flywheel when sudden power failure or voltage sag happens in the power grid,maintain uninterrupted power output to ensure the normal operation of the *** mathematical model,simulation of the working status of the REVC with flywheel is completed,and the characteristics of REVC with flywheel（REVCF） when a sudden power failure happens in the power grid are ***,the prototype experiment proves the correctness of the simulation results.

关键词： Rotating electromagnetic voltage converter flywheel energy storage mathematical model simulation characteristics

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Failure-analysis of carbon nanotubes and their extreme applications

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Nano Research 2023年第11期16卷 12364-12383页

作者： Mingquan Zhu Yunxiang Bai Runyi Gao Yajing Liu Peng Zhang Hui Zhang Luqi Liu Zhong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The study of material failure is crucial for the design of engineering applications,as it can have significant social and economic *** nanotubes(CNTs),with their exceptional electrical,mechanical,and thermal properties,hold immense potential for a wide range of cutting-edge applications such as superstrong fiber,lightning strike protector,and even space *** review provides an overview of the advancement in understanding the mechanical and electrical failure study of CNTs and their assemblies,serving as a comprehensive reference for utilizing CNTs in various *** begin,we emphasize the importance of studying material failure and provide a brief introduction to ***,we explore the mechanical and electrical failure characteristics of CNTs and their assemblies,along with notable examples of applications that utilize their failure-resistant properties,such as flywheel energy storage and lightning strike ***,we present perspectives associated with analyzing CNT failure and its implications for extreme applications.

关键词： carbon nanotubes failure-analysis flywheel energy storage lightning strike protection

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Multi–physical-field characteristics modeling and structure optimization for kW-level ultra-high-speed PM motors with integrated support system

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Chinese Journal of Aeronautics 2023年第4期36卷 455-467页

作者： Qixing GAO Xiaolin WANG Yan ZHANG College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Intelligence Science and Control Engineering Jinling Institute of TechnologyNanjing 211169China

In the aerospace industry,the low-mass ultra-high-speed flywheel system play a critical *** this paper,a kW-level Ultra-High Speed Permanent Magnet Synchronous Motor(UHSPMSM)as the core component of flywheel system is proposed and analyzed with consideration of multiple physical fields,including electromagnetic characteristics,mechanical strength and rotor *** integrated support structure is put forward to improve rotation accuracy and operation stability of the ***,influence of the integrated support structure on critical speed is explored,and the key parameters such as support position and support stiffness are ***,the rotor strength is analyzed by analytical model developed of rotor stress that can deal with multiple boundary *** and thickness of the sleeve are optimized,and range of interference value is accurately limited based on four extreme operating *** 3-D Finite Element Model(FEM)is used to validate the strength characteristics and stress distribu-tion of rotor.A 1.5 kW-150000 r/min UHSPMSM with integrated support system is manufactured and *** feasibility of UHSPMSM proposed and the accuracy of analysis method are verified through electromagnetic,temperature rise and vibration characteristics *** machine prototype realizes the load operation at rated speed and the multi-physical-field characteristics achieve the design specification.

关键词： flywheel energy storage Integrated support system Multi–physical-field charac-teristics Mechanical strength Rotor dynamics Ultra-high-speed motor

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