The New Type of Dual-rotor Permanent Magnet Motor for Underwater Propulsion: a Review
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摘要: 为进一步提高电机的效率和功率密度, 介绍了一种中间定子、内外双转子形式的新型对转永磁电机, 详述了这种新型双转子永磁电机的起源和演变, 梳理了当前国内外对其的研究现状, 从提高电机转矩密度、电机效率、机械稳定性、散热效果,改良定子绕组布置等方面分析了其主要优势, 最后对这种新型电机的研究难点进行归纳总结, 认为电磁耦合和转子同步问题应是其研究中的最大难点, 为进一步深入研究新型双转子永磁电机提供参考。Abstract: To further improve efficiency and power density of propulsion motor, a new type of permanent magnet (PM) motor with a stator in center and double contra-rotating rotors at both sides is introduced. The origin and evolvement of the new dual-rotor PM motor are described in detail, its key characteristics are analyzed, and the research status of the motor is summarized. Moreover, the main advantages are summarized with respect to the improvements in motor torque density, motor efficiency, mechanical stability, heat radiating effect, etc. The difficulties in the researches of this new dual-rotor motor are analyzed, and it is found that the problems about electromagnetic field coupling and rotor speed synchronization are more difficult to be solved.
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Key words:
- underwater propulsion /
- permanent magnet motor /
- dual-rotor /
- contra-rotating
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