Collaborative Research: Direct-drive Modular Transverse Flux Electric Machine without Using Rare-Earth Permanent Magnet Material

本研究的目标是开发紧凑、高扭矩密度、高能效、无稀土材料的电机，用于替代能源和交通运输。该方法是将横向磁通路径的概念与非传统的“环形”绕组相结合，允许在不降低每极安圈数的情况下增加极数。本研究的目标将通过电磁、结构和热设计、分析和优化，然后制造和测试50kW的样机电驱动。智能优点：建议的横向磁通机采用模块化结构，使用磁通聚焦技术来增加气隙磁通密度，而不必使用高磁通密度材料。磁极的模块化使机器易于组装和扩展。每个模块或相的双绕组为开发创新的控制方法打开了大门。这种结构具有高定子铁心利用率和高容错能力，这是牵引电机和风力发电机非常理想的特点。更广泛的影响：这项研究将建立高扭矩和功率密度电机的设计和设计方法，而不使用昂贵的稀土磁体材料。将设计的实用且成本更低的机器将促进替代交通运输，并提高可再生能源收集技术的渗透率。这项研究将在促进无齿轮机电系统的紧凑型、高扭矩电机领域建立美国的立足点。全面的教育计划包括关于替代能源和交通的讲座和实验室模块，这将有助于培养许多研究生和本科生。

Earth Permanent Magnet MaterialAbstractThe objective of this research is to develop compact, high torque density, energy-efficient, rare-earth-material-free electric machines for alternative energy and transportation applications. The approach is to use the concept of transverse flux paths with the unconventional "ring" winding that allows the increase of pole numbers without the reduction of ampere-turn per pole. The goals of this research will be achieved through electromagnetic, structural and thermal design, analysis and optimization followed by fabrication and testing of a 50kW prototype electric drive. Intellectual Merit: The proposed transverse flux machine has a modular structure that uses the flux focusing technique to increase air-gap flux density without having to use high flux density materials. The modularity of poles allows for easy assembly and scalability of the machine. The double windings per module or phase open the door for developing innovative control methodologies. The structure has high stator core utilization, and high fault tolerance capability, which are highly desirable features in traction machines and wind generators. Broader Impacts: The research will establish designs and design methodologies for high torque and power density electric machines without using expensive rare-earth magnet materials. The practical and lower cost machines to be designed will promote alternative transportation and increase the penetration rate of renewable energy harvesting technologies. The research will establish the US foothold in the area of compact, high-torque motors facilitating gearless electromechanical systems. The comprehensive educational plan built with lecture and laboratory modules on alternative energy and transportation will help train many graduate and undergraduate students.