In the field of ship propulsion, highly reliable propulsion motor is one of the key factors for the stable operation of the drive system. This paper proposes a new modular stator low-speed high-torque fault-tolerant permanent magnet motor (MCS-PMFTSM) for the direct-drive ship propulsion system. The unequal-span winding is used for enhanced fault-tolerant as well as modular operation of the motor. Each module is isolated electrically and mechanically, while the maintenance procedure is greatly simplified by the structure that uses external radiation installation. Introducing the new structure and operating principle of the MCS-PMFTSM, the basic size equation of the motor is derived followed by the analysis for the selection of the number of poles and slots. The rotor structure of the motor is then optimized using the genetic algorithm. The finite element method is used to analyze the motor performance under normal and various fault-tolerant conditions. In addition, the electromagnetic vibration of the proposed motor is also examined under different operating conditions. Finally, a 12 kW 100 r/min 3 × 3 modular prototype is developed to experimentally validate the excellent performance of the proposed motor under both normal and fault-tolerant operating conditions. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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船舶直驱推进用模块化永磁容错电机的设计与分析

在船舶推进领域，高可靠性的推进电机是驱动系统稳定运行的关键因素之一。本文提出了一种用于直驱船舶推进系统的新型模块化定子低速高扭矩容错永磁电机（MCS-PMFTSM）。不等跨绕组用于增强电机的容错性和模块化操作。每个模块之间电气和机械隔离，同时采用外部辐射安装的结构大大简化了维护程序。介绍了MCS-PMFTSM的新结构和工作原理，推导了电机的基本尺寸方程，然后分析了极数和槽数的选择。然后使用遗传算法优化电机的转子结构。采用有限元方法分析电机在正常和各种容错条件下的性能。此外，所提出的电机的电磁振动也在不同的操作条件下进行了检查。最后，开发了一个 12 kW 100 r/min 3 × 3 模块化原型，以实验验证所提出的电机在正常和容错运行条件下的优异性能。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。开发了一个 12 kW 100 r/min 3 × 3 模块化原型，以实验验证所提出的电机在正常和容错运行条件下的优异性能。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。开发了一个 12 kW 100 r/min 3 × 3 模块化原型，以实验验证所提出的电机在正常和容错运行条件下的优异性能。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。