Design of a Super HighSpeed Permanent （设计一个超级高速永久性的）.pdfVIP

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Design of a Super HighSpeed Permanent （设计一个超级高速永久性的）.pdf

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Design of a Super HighSpeed Permanent （设计一个超级高速永久性的）

Design of a Super High-Speed Permanent Magnet Synchronous Motor Yang Hu and Prof. Thomas Wu Center for Advanced Electric Machinery University of Central Florida Orlando, FL 32816 Outline 飦 Introduction 飦 Preliminary Sizing 飦 Windings and Slots Design 飦 Rotor and Airgap Design 飦 Optimization and Simulation 飦 Control and Drive 飦 Conclusion Super High-Speed Motors 飦 Applications require high-speed drives, such as centrifugal compressors, vacuum pumps, flywheel energy storage systems, friction welding units, and machine tools 飦 Increasing speed increases power density. 飦 Development of power electronics makes high speed electrical machines possible. Challenges 飦 Super-high speed will 飦 Increase eddy current loss 飦 Increase bearing loss of ball bearings 飦 Increase mechanical stress in the rotor 飦 Increase switching loss due to high frequency 飦 Increase difficulties in control Design Specifications Performance Specifications Value Ouput Power (kW) 3.0 Rated Voltage (V) 50 Mechanical speed (RPM) 150,000 Number of Slots in Stator 24 Number of Poles 2 Material Considerations 飦 Permanent magnet 飦 Nd-Fe-B (neodymium -iron-boron ): the highest energy density, does well above 135 K. 飦 Sm-Co (samarium cobalt): does quite well at both cryogenic temperature and higher temperature. 飦 Winding 飦 Multi-strand Litz-wire to reduce proximity effect and skin effect. 飦 Stator 飦 Laminated low loss silicon steel. 飦 Thin lam