基于磁热耦合法的提花喷气织机直驱永磁电机设计

针对传统异步电机驱动提花喷气织机传动链冗长、系统效率低、噪音大等问题，提出一种永磁电机直驱系统。为保证布匹质量，采用遗传算法优化转子偏心距和极弧系数，削弱电机转矩脉动。由于提花喷气织机负载不断变化，持续影响电机磁热性能，提出一种瞬态磁热双向耦合逐次逼近稳态温升的计算方法。对比分析了不同功率点下电机温升分布规律及电磁性能，得到最佳功率点。最后研制了一台3.1 kW的样机并进行试验，试验数据与仿真结果基本吻合，验证了所提的采用瞬态磁热双向耦合逐次逼近稳态温升进而选取最佳功率点的合理性，为提花喷气织机直驱永磁电机设计提供了依据。

Design of Jacquard Air Jet Loom Direct-Drive Permanent Magnet Motor Based on Magneto-Thermal Coupling Method

Aiming at the problems of long transmission chain, low system efficiency and high noise of traditional asynchronous motor driven jacquard air jet loom, a permanent magnet motor direct-drive system is proposed. In order to ensure the cloth quality, the genetic algorithm is used to optimize rotor eccentricity and pole arc coefficient and reduce torque ripple. Due to the continuous change of the load of jacquard air jet loom, the magneto-thermal performance of the motor is constantly affected. A calculation method of transient magneto-thermal bi-directional coupling is proposed to approach the steady-state temperature rise step by step. The temperature rise distribution law and electromagnetic performance of the motor at different power points are compared and analyzed, and the optimal power point is obtained. Finally, a 3.1 kW prototype is developed and tested, and the experimental data are basically consistent with the simulation results. The rationality of using transient magneto-thermal bi-directional coupling to approach steady-state temperature rise successively and select the optimal power point is verified, which provides a basis for the design of direct-drive permanent magnet motor in jacquard air jet loom.